Questions related to Mechanical Engineering
A high grade energy can be completely converted into a low grade energy, however visa versa is not possible for a spontaneous process. Since PE can be converted into KE but KE cannot be converted into PE when the process is spontaneous. Therefore should we consider KE is a higher grade energy like work and electrical energy?
I want to show simulation of rotary friction welding process using either Ansys 14 or pro engineer 5.0
Iam doing experimental analysis on friction welded specimen,static,fatigue,compression,torsion,thermal and microstructure
Can anyone help me how to do simulation of friction welding when actually it is happening?????,i actually read a report on this simulation done in abaqus software?
Hello! I have an exercise to do and I am struggling with it for a week ago. I have a 2D flow with the initial velocity at the inlet=0.01m/s. And I want to calculate the numerical results of the velocity which is the function of x and y direction (U(x,y)) in the domain of the water flow. For example if I want to calculate the velocity at the distance x1 and x2 (as in the figure) in the function of x and y., how can I calculate it? Please note that it is incompressible flow. It is fully developed after it passed the entrance length. The height of the domain is 0.02 m and the length is 1 m. Please help me! You can see the following figure. Thank You in advance! I will appreciate your help !
Hi dear researchers
Im trying to model polymeric material, but the elastic module of that is not constant and varies with change in strain, this polymeric strip(membrane element) is embedded in soil as a reinforcement and tensile load will be applied to that, so I wanna know if for my purpose using property >> mechanical >> elastic >>Hyper elastic is suitable or not, because as I know entering stress -strain test data is possible in hyper elastic.
Im wondering if using hyper elastic requires any special conditions or not or any alternative( better) way for my purpose.
I know the procedure of modeling modal analysis to obtain natural frequencies(I mean using Linear perturbation step>>frequency and without defining any other loading....) but the problem is all examples I have seen is just for model made of just one material(most examples for cantilever beam) but my model is consist of two or more material( 2layer soil and layer of polymer between these soil layers), for obtaining natural frequencies in this case, my exact question is: I have to run modal analysis for each material separately or all together?!
I should mention that the polymeric membrane part does not have any type of support and its just in interaction with soil( normal and tangential behaviour), and if I run the modal analysis for this part alone natural frequencies for polymeric membrane is zero. while the soil is fixed at bottom and sides and by running modal analysis once for soil alone and another time soil with polymer,the natural frequencies are the same for both conditions. so i'm willing to know any advise and special point to obtain natural frequencies procedure for model consist of two or more materials in abaqus.
What is the shell orientation mean in ANSYS APDL?
Does it mean that if I have a shell on the XZ plane then I set the orientation as 0 degrees as shown in the pictorial view
and if I have a shell on the XY plane then I set the orientation as 90 degrees?
Or does it mean something else? Like the direction of the fibers in the material?
Looking for a motivated Ph.D. candidate to work in the field of additive manufacturing with the background of mechanical engineering and material science.
Deadline for application: February 14, 2020
I want to determine the Nusselt number (Nu=hDh/k) in the heat exchanger. In calculate of heat transfer coefficient (h=q''/(Tw-Tb)), for the q'' parameter, I use the total heat flux of the channel walls that is the contact with the fluid and use the average temperature of these walls for the Tw parameter. In this equation, I need the bulk temperature (Tb). How can I calculate it in Comsol multiphysics?
I am interested in the mathematical apparatus for this process, as well as the method of step-by-step modeling in the specified FE complex.
i am getting an error whenever i am running the given attached simulation on ansys maxwell 16.0.
This arrangement consists of two electromagnets housed in two coil of copper winding supplied with ac voltage as shown.
I have given excitation voltage in both the winding separately as shown and boundary condition on coil as shown.
I am using transient solution as type of solution.
Any advice you provide me will be highly valuable.
I am presently working on project which alredy created by previous students on ansys workbench, where my work is to automatize set of variables in batch mode to genarate the data.
To do that i craeted small project, recorded python journal file and edited them to feed set of values to parameters eg:Young's modulus and results are printed out to text for each instance by running ansys in batch mode.
reference : https://github.com/kpestov/ParametricStudyAutomation (i follwed almost similar)
The example project worked perfectly fine and achived what i wanted but its not working with my actual projects where if i run the sript there will be no errors/warnings instead, at each iteration it prints out same output which is wrong.
My questions are
1. Does the warnings (not errors since the problem solved with all components with green marks, image1) which are genarated in workbench can cause problem to brakedown the script??
2. I found out that i can see some journal files in session file which named crashed but i cant really able to figure it out whats the problem, do you think these are main source of error for script to brokedown? (image 2)
3. Does anyone faced this problems or experience pleae share your thoughts.
Thank you and I eagerly waiting for your suggetions and helpful answers.
Hi, I am doing LCF analysis using direct cyclic approach in abaqus based on continuum damage mechanics, I am really confused about when the analysis would end?
It seems to me that the LCF analysis always end when the maximum number of cycles is reached. But the User's Guide said 'this process is repeated up to a point in the loading history at which a fatigue life assessment can be made',Does that mean the analysis would end if fatigue life could be made.However, my result showed that some elements were deleted due to failure,that's the fatigue life, why the analysis still went on till Nmax?
Another Question,I find that the 1st cycle always used up all iterations, for instance ,the dafault value of iterations is 200,then, 1st cycle would be obtained after 200 iteration. while subsequent cycles don't, they usually use several iterations. I don't know why.
please give me some advises if you know anything, I really appreciate it. Thank you in advance!
I am doing a metal forming simulation in Abaqus, and I want to create a mesh similar to the one in the attached image. Particularly, on the "Blank" part, where there is a dissimilar mesh transition, going from fine to coarse.
I heard that if I use TIE constraints then this will work. But it is not clear to me how to do this?
How could I use TIE constrains in Abaqus to create and merge dissimilar regions of mesh density within a part?
Thickness and diameter shrinkage percentage of the Al2O3 sample (after sintering):
I can't quite catch the meaning of the definition of "single stiffness ". In the case of helical gears, which plane does c' defined in, the normal plane or the transverse plane? It seems to be in the transverse plane from the definition.
In the equation (80), c’=cth’CMCRCBcosβ. Why the fact for helical gears is cosβ?
cth’ for helical gears is calculated in the normal section (per unit contact line). Should it be cth’* cosβ/ cosβ= cth’ in the transverse section (per unit face width)?
Thank you for your time.
What can cause severe bending conditions on the wind power plant's tower(only the tower part)? I assume that as the wind hits the blades it create a bending moment which vary linearly from wing tip to wing base. This moment will be transferred from blade's base to the top of the tower ( we have then a model like a beam with one end fixed and a bending moment on top). And I think that this moment has larger condtribution to tower's bending than the force coming from the wind as it hits the structure. Correct If I am wrong.
I am simulating a solar powered absorption chiller. But I want to manipulate ots working time. For example, the system will run from 6 am to 10 am, then a break of 4 hours and then again run for four hours and then stop. How do I achieve this ?
how can I find a common related project between chemistry (polymers or biomolecules) and mechanical engineering( for example fluid mechanics )???
I'm using Ansys Fluent software for CFD simulation and I'm gonna to learn CFD coding and optimization and also UDF.
Im modeling test which first phase of that is displacement control (adding constant rate of displacement) and the next phase is load control (adding cycling load) ,more precisely after reaching specified load by constant rate of displacement cycling load must be applied,however something seems wrong.cycling load doesn’t being applied correctly, and in plot stress ,stress stays constant (stress at the end of first phase)in cyclic phase. so I deactivated the displacement control in following step(cyclic phase) but in this situation stress drops to zero, and for the last attempt I activated that again but I modified it too and made the displacement in following step zero but it didn’t help and stress decreased slowly, it must be mentioned I modeled cycling load alone in first step to see if the problem related to that but everything was correct and cyclic load applied correctly in this situation I will be thankful for your help.
i am working as a lecturer in the department of Mechanical Engineering in Pakistan institute of engineering & technology. I have to assign complex engineering problems in my teaching course which is manufacturing processes.
Forming & shaping processes and equipment, material removal, cutting tools, machining processes for producing various shapes, extrusion and drawing, sheet metal forming, forming & shaping plastics & composite materials.
Please suggest complex engineering problems from the above mentioned topics
I am a novice student doing a research project on water absorption in polymer composites with sodium silicate coating.
I want to ask about how to determine the result of the percentage of water absorption which is the sum of the percentage gain in body weight and the percentage of dissolved matter lost
for example, the conditioned weight is 9.76 grams then the wet weight at the time of immersion for 24 hours is 7.05 grams. Because there was a reduction in weight, my specimen was reconditioned with the result that the reconditioned weight was 6.83 grams.
Is it true that the percentage increase in weight was -27.77% and the percentage of dissolved matter lost was 30.02%? Then to determine the percentage of water absorption, just add (-27.77%) + (30.02%)?
Is there something wrong with my calculations?
please help in that case. thank you
I am working with a tool which was originally a solid and I have transformed it to surfaces with Geometry edit --> Face --> Remove. This tool bends a previously imported sheet flange (3D part) . However, the simulation gets aborted when running because :
"The ratio of deformation speed to wave speed exceeds 1.0000 in at least one element. This usually indicates an error with the model definition. The elements contained in element set ErrElemExcessDistortion-Step3 have distorted excessively"
Watching the results, it just seems that my deformed part "surpases" the tool, which makes some elements distort. The simulation works with a solid tool.
My Senior design team is designing a Spring compressor for cars specifically, I was wondering if anyone is able to give me some guidance on what specific variables, or calculation analysis I should make before starting a design. Any help would be appreciated!
I am working on Laser forming simulation using ABAQUS software. I could generate temperature accurately as per the reference paper I am following, but I could not match my results in displacement and bending angles.
Can anyone help me resolve this issue. If anyone is willing, they can contact me at 8074841553, (INDIA) or [email protected]
The paper I am following is attached below.
In daily life single period and multi period inventory system is very necessary things. When the selling period is fixed that is we cant sell things outside that fixed time then it is called may be single period. Lets talk about it what is the actual definition.
Dear Research Gate Members,
Nowadays, everyone is talking about the new variant of Corona virus COVID-19 and its affects are alarming throughout the world.
Please, share your expert suggestions on the following question.
What is your expert opinion/experience/suggestion about the new variant of Novel Corona Virus (COVID-19)?
Thanks & Regards
I have a block of mass 'm' modelled as a spring-mass-damper system. A horizontal force F is acting on the mass as shown.
- spring constant = k;
- damping coefficient = c.
Most of the models I see has a vertical push/pull force on the mass. Then the free body diagrams becomes easy. How do I make a free body diagram in this case? Also, I am mainly interested in Moment induced on the bottom hinge point.
I want to find the rotation per unit length of a thin tube using their stress-strain characteristics in incremental theory.
it means the oil pump to be sometimes able to turn off during the driving cycle, and if it is possible, how efficient would it be? (more particularly in heavy vehicles like a bus).
When it comes to choosing a good journal, it has always been debated which one is more important? Impact factor (IF) or journal quartile (Q)?
I give an example, you have three following journals, which one would you choose?
1- IF: 1.3 & Q1
2- IF: 2.5 & Q2
3- IF: 3.9 & Q3
Please select one of the three journals above and give a reason for that.
The KGR test is done to obtain the shear stress-strain curve for any adhesive according to ASTM D5656 standard. The shear stress is reported to be the average stress. But nothing has been so clear about the corrected shear strain. Is it the average strain or the maximum strain?
Refer the book "Gas Turbine Powerhouse: The Development of the Power Generation Gas Turbine at BBC-ABB-Alstom" by Dietrich Eckardt (available at https://books.google.com/). On page 275 a reference of GT8 rotor damage due to high slenderness ratio is given. I could not find much about such effect in open literature. Does anybody know what is effect of rotor slenderness ratio (L/D) (or rotating body in general-any papers/references)? Few more specific questions:
- What will be the effect of slenderness ratio (other than regular rotor dynamics parameters i.e. critical speed, unbalance response and catenary) on the behavior of steam turbine rotor?
- Is there any allowable limit of slenderness ratio for a steam turbine rotor?
As shear strength of AA2024-T4 alloy is inversely proportional to the temperature. is there any equation to predict shear strength of AA2024-T4 with respect to temperature?
I am a Master of Mechanical Engineering student and I am trying to determine the dimensions (cup size, diameter etc) of the acetabular model (STL) using Matlab and would like to get some suggestions on how I can achieve this.
Thanks in advance
Dear Research Gate Members,
Most of the cities in the world are facing partial or complete Lock Downs due to Pandemic Novel Corona Virus (COVID-19) spread. Millions of people in the world are living in Government or self-administered Quarantines. The world is expecting a long time with it and continuously learning to live with it. In this situation Online Education/Distance Learning and Work From Home (WFH) are the ultimate new realities for many in the world.
Many organizations and Educational Institutions are doing “Online Education/Distance Learning and Work From Home (WFH)” very first time. Google ZOOM and Microsoft TEAMS became the top priorities for most of them. Many organizations and Educational Institutions are still confused in making the choice between Google ZOOM and Microsoft TEAMS. In this scenario, it’s really important to share your expert opinions and experiences.
Please, share your expert suggestions and/or recommendations on the following question.
How do you compare Google ZOOM Vs Microsoft TEAMS for Online Education / Work From Home during Novel Corona Virus (COVID-19) Lock Downs/Quarantines?
Thanks & Regards
I have radial blade centrifugal fan design which will be mounted on exhaust side of electric traction motor.
The fan will be mounted on same motor shaft inside the housing.
How can I verify that due to flow resistances there won't be any restriction to flow inside the motor and thus for cooling.
Yesterday night, I was working on some model in ABAQUS and all of a sudden it gets shut down. When I tried to reopen the model, it was not opening and since then every time I try to reopen it, it always creates new model on its own without showing any of the previous contents of the old model.
Although *.cae file is still of the same size (around 233 MB) and *.jnl file is also there. But I don't know how to run that *.cae file and recover the old model. I would really appreciate any kind of assistance in the above matter as it represents around 6 months of work.
Thanks in advance.
I am modelling a simple pipe flow of a non-newtonian fluid (Ansys CFX). I'm aware that this is an area of developing knowledge.
The viscosity model for the non-newtonian fluid is the Carreau-Yasuda model. The fluid properties are taken from literature (Escudier et al, 2005). I thought it would be interesting to plot the variation of viscosity with shear strain rate in CFX, and compare that to the original viscosity relationship.
The attached image shows this plot. Grey line: Original data (Escudier et al 2005). Yellow line: Original data plotted using CFX slightly modified Carreau-Yasuda equation (I need to look into this separately). Blue line: Laminar flow, approx Re=780. Orange line: Turbulent flow, approx Re= 45000. (N.B. picked these Reynolds numbers for a comparison, they're not arbitrary).
The question is: Why do the CFD results for shear strain rate vs. dynamic (apparent) viscosity deviate so far from the input relationship?
My thoughts are that this is a mathematical issue in the CFX solver. I'm having difficulty pinpointing an explanation though, my knowledge in this area is still developing.
For reference, I'm a Masters student in Mechanical Engineering.
I am currently researching the impacts of components of digital transformation and Industry 4.0 (optimization, automation, digitalization) on the fairly old field of mechanical engineering.
Has mechanical engineering been able to keep up? Are mechanical engineers adapting - taking programming courses/getting involved in something that was once for electrical engineers?
Thank you in advance for any input.
Dear Research Gate Members,
Due to Novel Coronavirus (COVID-19) spread, many cities are facing partial or complete Lock Down. Like other sectors, Higher Education is also affected badly due to these Lock Downs. To overcome this situation either many Higher Educational Institutions (HEIs) have adapted the Distance Learning/E-Learning/Virtual Education or planning to implement it. Many Universities and/or colleges are new to Distance Learning/E-Learning/Virtual Education and are having issues in its implementation as well. In this scenario, it’s really important to share the expert opinions and experiences.
Please, share your expert opinion, experiences and/or suggestions on the following matter.
Which Learning Management System (LMS) is more suitable for Distance/Virtual Education or E-Learning in Higher Educational Institutions (HEIs)?
If you prefer more than one, then please rank them.
Thanks & Regards
I have a problem where I am trying to vary the stiffness spatially across a structured interface. The whole idea is to vary the stiffness vertically, with a bulk stiffness of 8GPa decreasing smoothly over 100 micrometres to 2GPa. To achieve this I have been using the USDFLD subroutine in Abaqus to create a functionally graded material. The base Fortran code Ive started with is attached as txt file.
To vary the stiffness I have created a field variable to relate Young's modulus to the y-coordinate system which would be really easy to get the desired result if it was just one part (as shown in the contour plot). The main issue I have with varying stiffness when both parts are present in the assembly is the area where these intersect each other vertically prevents my current code from working. Im very new to using subroutines, I think it should be fairly easy to create a code to enable the stiffness to vary for both identical parts.
The code I have works for one part, so would it be possible to take the functionally graded component and export it as a part and then assemble and add boundary conditions from there?
Any help would be greatly appreciated!
Dear Research Gate Members,
Online Education / Distance Learning and Work From Home (WFH) are the ultimate new realities for many in the world due to Pandemic Novel Corona Virus (COVID-19) spread. In this situation, many organizations and Educational Institutions are practicing “Online Education/Distance Learning and Work From Home (WFH)” now on regular basis. Google ZOOM and Microsoft TEAMS became the top priorities for most of them. Many organizations and Educational Institutions are still thinking to switch the meeting platforms. In this scenario, it’s really important to share your expert opinions and experiences.
Please, share your expert suggestions and/or recommendations on the following question.
Have you observed the improvements in Online Meeting Platforms during COVID-19? In this context, how will you compare Google ZOOM & Microsoft TEAMS?
Thanks & Regards
I need the following tutorial zip files to learn the basics of the software:
- Using sliding and dynamic meshes
- Modeling solidification
- Using the Eulerian Granular Multiphase Model with heat transfer
- Using the Adjoint Solver – 2D Laminar Flow Past a Cylinder
- Simulating a Single Battery Cell Using the MSMD Battery Model
- Simulating a 1P3S Battery Pack Using the MSMD Battery Model
hi hope you are well in this current climate,
I am doing a project on Catia where i need to design a scissor jack like the one attached. however i wanted to know how i can calculate the dimensions and angles the criteria i have been given is it needs to hold 1.5 ton and have a minimum 30mm lifting capability
I am trying to define/assign initial stress to a coating I modeled on a substrate. I defined the coating using "skin" function. I have tried "predefine filed" in load section. But it only allows me to assign initial stress to the substrate (known as region), not the coating (skin). I appreciate your kind suggestions!
I'm trying to model a multi-layer coating on a substrate in abaqus. The layers are homogenous and isotropic. My question is how should I approach the modeling?
WHAT I'VE TRIED SO FAR:
I used the skin function, but I can only see the latest skin I defined (Can't visualize all the skins to see their position at the same time). So, I can't be sure if all the skins are properly defined!
I tried this approach and was able to define the layers. But this approach requires fiber rotation angle as input while my materials is isotropic and homogenous.
WHAT I PREFER NOT TO DO:
I can partition my model and define the individual layers manually. However, The problem is I then have to mesh each partition (layer). This means the mesh size will be extremely small along normal direction and I get mesh verification warnings.
I appreciate your kind suggestions
I am required to perform turning operation at constant velocity and depth of cut but for different feed using Abaqus. However I can't understand how do I associate feed in my model/simulation.
I am working on a capstone project for my mechanical engineering degree. Our design is an attachment for dental drills that will detect the drilling depth as the procedure is happening and will notify the dentist when the correct drilling depth is achieved. In order for the design to detect the drilling depth (up and down linear movement) there must be a sensor that can measure how deep the drill has moved down into the tooth. This sensor will be wired to a wifi enabled microcontroller which will send the data to an iot platform that is integrated with matlab to process the incoming data. We need to provide a proof of concept as ar real prototype is out of the question due to covid.
TL/DR: Is there a sensor small enough that can be attached to a dental drill that can measure linear position (up and down)?
I am currently looking for ideas for my thesis (Bachelor of Mechanical Engineering) and I am trying to see what possible areas within the 3D printing community would possibly be suitable. Any suggestions would really be appreciated!
Edit: one possibly idea is something regarding using 3D printing to help during a pandemic?
What are some of the current available research grant opportunities(i.e. name of funding organizations, process for availing funds, special eligibility requirements(if any)) for M.Tech (Mechanical) students in India?
Any information regarding it would be highly appreciated.
I would like to compare the environmental load of dry and wet grinding under laboratory conditions (later with the scale-up method also for operating conditions). I have already performed the laboratory measurements for the grindings of the same material and in addition to the grinding parameters. I calculated specific energy requirement values for dry and wet grinding processes. Are there any researchers who have compared the results of dry and wet grinding with possibly LCA analysis? I would have some questions about LCA analysis that I am currently unsure about. Thank you very much. Kind regards, Viktoria Mannheim
I am looking for a formula to calculate specific temperature drop in duct based on airflow, knowing the specific power loss, airflow, thermal properties of the duct, and air temperatures. The goal is to be able to produce the graph attached.
As insulation materials are generally used in the pre melting or much safer temperatures, I am finding difficulty in getting data such as latent heat of fusion of any insulation materials. Can anybody provide me with the latent heat data of any insulation material, glass wool or rock wool?
I am trying to apply material mapping to the vertebral model. I exported image data and surface model (.stl) from the 3D slicer, but when the same are imported IA-Femesh, there is no overlap, so cannot apply the image intensity based properties.
Can you please help me to resolve this issue.
Is it possible to link the IA-FEMesh to 3D slicer?
I am making a LAMMPS simulation for a surface grinding procedure for my final year Mechanical Engineering project. Does anyone know where I could find the parameters (Epsilon and Sigma) for the Lennard Jones interaction?
Maybe eam too but I want to keep the model as basic as I could.
Consider a voltage drop V is applied on two electrodes, which are inserted in the electrolyte solution. When increases the electrolyte concentration, the conductivity of the solution increases. The resistance reduces and the current increases. Imagine a limiting case, the electrolyte concentration is large enough so that the solution acts as a conductor. Thus, the voltage drop V cannot exist. So V=0. Here comes my question: how does the voltage drop change when electrolyte concentration is increasing to such limiting case? It will be great if you can suggest any textbook for reference. Thanks in advance.
MICLASS and DCLASS coding system in group technology follow which type of coding: monocode, polycode or mixcode? Why Opitz classification and coding system is a mixed code. I can understand that there is the feature of polycode, but I cannot find any feature of monocode or hierarchical order in Opitz coding system.
I have done a 3-point bend test experiment.
I have also done a 3-point bend simulation using the true stress strain values obtained from tensile experiments.
The graph output of simulation does not match with the experiment and is it because of the true stress strain (Abaqus) vs the engineering stress strain (experiment).
Thanks in advance.
Jerin Wesley R
I have recently graduated with a BSc in Mechanical Engineering. During my BSc, I assisted research and projects on a variety of fields ranging from nanomechanics of advanced materials (experimental), predictive analysis of stochastics data input for control (MATLAB), human balance control (theoretical), dynamical modeling of fluid/solid coupling problems, and corresponding CFD in OpenFOAM, computational aerodynamics with HPC. Upon my graduation, I joined a research team at ETH Zurich as a scientific assistant to work on vortex kinematics (theoretical and computational).
My main interest areas are:
- Nonlinear Dynamics and Chaos, Stochastic Systems, Machine Learning of Dynamical Systems and Fluid Dynamics, Prediction, Nonlinear Control
- Computational Finance, Financial Analytics
- Numerical Methods, Computing and Algorithm Development
Clearly, all of the fields mentioned above require a decent knowledge of mathematical modeling, analysis, and computation (mostly by parallel computing over HPCs). One can also argue that these areas are not really far from each other as they can be all classified into an umbrella field of Dynamical Systems Theory.
I will soon start my MSc in Computational Science and Engineering at ETH Zurich. However, I am struggling to decide which specialization area I should choose.
As a part of the program I have to enroll at least in two of the following CORE SUBJECTS:
- Advanced Numerical Methods for CSE
- Optimization for Data Science
- Computational Statistics
- Advanced Systems Lab (Fast Numerical Codes)
Of this, I am planning to take all as they are rich in content, relevant to my multidisciplinary taste, and beneficial for my future plans. They are also fairly complementary to one another.
I will also have to take two mandatory subjects as a part of the admission requirement:
- Numerical Methods for CSE
- High-Performance Computing Lab for CSE
*The program requires me to take 5 courses in my selected specialization area. The rest of the credits necessary to graduate can be chosen freely from any department.
ETH is a top-notch institute for education and research in all three of Control & Robotics, Fluid Dynamics, and Applied/Computational Mathematics. This at least ensures that whatever I choose I will still get a quality education and have a chance to do quality research.
As we all know, modern areas such as robotics, data science, software engineering, neuroscience, computational biology and etc. have rather well-defined career paths. These people would not have as many troubles as a multidisciplinary guy (e.g. my MSc program) to decide what subjects to take and what to focus on.
Now, I lost 2 lost years between the high school and university and I believe this has eliminated some of my flexibility in this kind of decision, especially given that I am in a distance relationship of which I have to also take care of. It is likely that I will prefer to stay at ETH for my Ph.D. or work some time here before my Ph.D. I may also choose to do my Ph.D. in one of the other top schools.
I really appreciate your opinions and advice!
Thank you for your time and patience!
I am using Abaqus Python scripting to model the following sketch. The dashed green line (Curve_0) is a half circle and the yellow one (Curve_1) is a circle arc. The center point of Curve_2 (which is another circle arc) named Cen_2 must be located on Curve_1. Assuming the x coordinate of Cen_2 is x_Cen_2, its y coordinate can be easily calculated using the equation of Curve_1. However, this point is not located on Curve_1 which might be due to some graphical complexes or any other reason (please see the figure). In this regard, I have tried several approaches to solve this issue. But none of them has worked. I would appreciate if anyone could kindly advise.
Previously I worked on combustion engines....
But now due to my new adviser, i want to work on nanotechnology...
I want to work on a subject that relates to both nano and engine ...
Do you have any suggestion?
I am doing machining simulations. For any lubrication assisted machining process, lubrication will decrease the coefficient of friction at the workpiece-tool interface and lubricant will also take the heat out of the system. For the heat taken out from the system, to my best knowledge, I have to measure the heat transfer coefficient. But what about the reduction in coefficient of friction? How can I measure the reduced coefficient?
I have start my study about MD simulation of Refrigerant condensation. I am studying the LAMMPS software for my MD simulation. But I am not clear that how I could write a input script in LAMMPS for a particular refrigerant for example R600a in the capillary tube system and how to create the potential file of the Refrigerant?
What according to you should be researched/accessed with respect to WC based solid lubricant tools? What is your view with respect to future research in this area? (For e.g. Tribological study etc..)
Thanks in advance..
To find equivalent static loading of dynamic events, displacement vector of the dynamic analysis could be used as attached picture.
To use this method in Abaqus, how we could export the displacement vector of Dynamic, Explicit analysis result and import it as equivalent static load in another Static, General analysis?
i m working on large industrial centrifugal fan to investigate causes of failure.
How to calculate forces acting on Large industrial centrifugal fan blade to be considered in the Finite Element modelling(specially fluid forces)?
are there any Formulas for calculating fluid force or i should use CFD simulation?
thanks for your recommendations.
As we have seen that most powerful and expensive quadcopters being swept away by prevailing wind gusts and losing connection with the controller, and even that “fail-safe” GPS-enabled Return To Home feature will struggle and oftentimes fail when flying into a strong headwind.
How to make it reliable and robust for sever weather conditions?
Many informal settlements have insufficient capacity to forecast, check, handle and reduce disaster risk. These communities face a growing range of challenges including economic hardship, technological and social impediments, urbanisation, under-development, wildfire, climate change, flooding, drought, geological hazards and the impact of epidemics such as HIV/AIDS and COVID-19, sometimes termed ‘the burden of disease’. The inability of these communities to withstand adversities affects the sustainability of initiatives to develop them.
This is a question I would have asked during my masters degree research on Resilience in Disasters. I would like to know the opinions of other researchers as I would like to properly answer this question in a different research-related topic.