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I want some informations about computational mechanics as i want to do my master's in this field

Hello Everyone,

I am Md. Zahidul Mustakim from Bangladesh. I have graduated in Mechanical Engineering and I want to pursue my Master's Study in the field of Computational Engineering/Mechanics. As i was not familiar with this field in my undergrad study I really dont know much about this subject. I would be really grateful if You please send me some informations about the points mentioned bellow:

1. Is computational Engineering same as Numerical Simulation?

How should one compare material fatigue strength in thin film area?

For several common electroplated materials: Ni, Cu, Au and Al, which one has strongest fatigue strength? We know the mechanical properties of thin films are different with their bulk counterparts due to the so called "size effect", and material properties depends largely on the microstructure and processing technique. But is there some mateiral laws or guidelines for designers to choose the "best material" as for fatigue resistant? Yield limit? ultimate tensile strength? or elongation? How could one compare material candidates without doing time-consuming test?

What are the criteria for the decomposition of the total strain into elastic and plastic parts?

We know that total strain is the symmetric part of the displacement gradient. Total strain can be represented by the sum of the elastic and plastic (eigen) strains. Let consider a dislocation in an arbitrary solid. Suppose we computed the displacement filed, therefore the total strain can be obtained immediately. What are the criteria for the decomposition of the total strain into elastic and plastic parts?

 

Aaron Goh's picture

Academic Positions in the Department of Mechanical Engineering, Curtin University Sarawak

Applications are invited for full-time, continuing academic positions in a number of areas in the Department of Mechanical Engineering, Curtin University Sarawak.

Please see website for information : www.curtin.edu.my

Konstantin Volokh's picture

Nice and low-cost introductory texts

There are two very nice companion texts on continuum mechanics and nonlinear elasticity printed by Dover recently: "Continuum mechanics" by Spencer and "An introduction to the theory of elasticity" by Atkin and Fox. Great and fairly affordable reading!

reflection boundary condition

I am planning on using finite difference coding to solve a wave equation. The domain is a rectangular domian with wave reflection on the boundaries. Does anyone know how to set the reflection boundary condition?

Ning Wang's picture

Noncovalent bonds dictate cell rheology

Over the last ten years, a peculiar behavior of living cells is revealed: their modulus increases weakly with loading frequency (the so-called weak power law behavior) (for a pure elastic solid, the slope is 0; for a viscous fluid, the slope is 1).  The underlying mechanism is not clear at all; although a phenomenological soft glass rheology model (a model based on a disordered structure system) has been proposed, it cannot explain the multi-power laws at different loading frequencies (see Stamenovic et al, Biophys J Letter, 2007). 

The Change of Microstructure at low temperature

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Recently, we do some work about the dynamic strain aging. In order to investigate the function of solute clouds and precipitates in DSA, we do some experiments. The solution treated LY12 alloys are tested on MTS at low temperature (173K), and the Portevin-Le Chatelier phenomenon disappeared as we expected. But, we need more information about the change of microstructure under the low temperature, what is more the micro-optical observation should be finished in a very short time when we consider the effect of natural aging. Obviously the TEM can not meet our needs.

Equilibrium and stability of dielectric elastomer membranes undergoing inhomogeneous deformation

Dielectric elastomers are capable of large deformation subject to an electric voltage, and are promising for uses as actuators, sensors and generators. Because of large deformation, nonlinear equations of state, and diverse modes of failure, modeling the process of electromechanical transduction has been challenging.  This paper studies a membrane of a dielectric elastomer deformed into an out-of-plane, axisymmetric shape, a configuration used in a family of commercial devices known as the Universal Muscle Actuators. 

Recommending a book on FSI with recent discussion on Immersed Boundary/Continuum Methods

I am writing to recommend my book “Fundamentals of Fluid-Solid Interactions-Analytical and Computational Approaches” recently published by Elsevier Science.  The book is available in amazon.com webpage  or Elsevier Science webpage.  The following is

contact & Geometric non linearity

I am looking for acadmic material to address contact & Geometric (Large deformation) non-linearity problem. Can anyone provide the material to address these two concept in details.

Thanks

Ritesh Parikh

Computational Mechanics PhD opportunities for Top Class Chinese Students

Dear Chinese students interested in a PhD in computational mechanics, 

You will find below some information on a fellowship you can apply for.  

http://www.gla.ac.uk/studying/scholarships/internationalscholarships/...

China Scholarships Council

Deformation gradient in VUMAT of ABAQUS

Dear All,

     In ABAQUS manual, it is said for hyperelastic material, it is better to define it by stretch tensor U. But if I need to use deformation gradient F in the material model directly, I need to rotate the stress back to corotational frame. How should I do that?  Should I make a polar decomposition of F=R*U first, and then apply Rt*S*R? or I can use the relative spin increment already provided to do that? If so, how?

ABAQUS beam elements

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Every engineers,

I am Homo and go to learn ABAQUS, but I have many questions, i.e.:

What is difference between Section points and Integration point in ABAQUS(espesialy in beam elements )?

Waiting for your kindly response

Homo

Scholarships for Computational Mechanics in the UK for non-EU students

Dear non-EU students who want to study in the UK,

You are encouraged to look at the fellowship offers below. If you qualify for these and are interested in working in a dynamic group in computational mechanics in Glasgow, please contact me directly stephane dot bordas at gmail dot com

 Our department has a growing team of PhD students (more than 20 at the moment) working in cognate disciplines, which will give you a unique opportunity for a strong PhD in computational mechanics. 

Zhigang Suo's picture

iMechanica will be down briefly at 10 am this Friday

Just got a message from Lesley Lam, iMechanica user number 1, as follows.  Harvard School of Engineering and Applied Sciences IT is in the process of moving our servers to a faster, newer host.  As part of this process, I would like to take down iMechanica for about 10 minutes on Friday October 3rd at 10am.  I am hoping this will improve performance and reliability on the machine as well.

Call for fellowship applicants PhD ORSAS

Dear international, non EU students,

 I am looking for high quality applicants for the following prestigious fellowship:  http://www.orsas.ac.uk/

If you have experience in computational mechanics or numerical methods and would like to join a vibrant research group in Glasgow, UK, if you already have international publications in leading journals, then, send me 

- your CV

- a statement concerning why you think you are the best candidate 

- a list of three references

Three MSc + PhD positions available on Multi-Scale and Biomechanics Parallel Simulations on HECToR.

Dear all,

 Three positions are available for a unique MSC + PhD on massively parallel processing for computational mechanics in the field of multi-scale, XFEM and biomechanics. 

 Details here:  http://www.gla.ac.uk/departments/civilengineering/postgraduatestudy/rese...

 Experience in Finite Elements or numerical methods and mechanics is *essential*. Please do not apply if you do not have this experience.

chimaney silencer + acoustic + ASME standard

Dear All my friends,

I have to design silencer at chimaney outlet. The silencer can be easily designed for mechanical strength as per ASME section VIII standard. But now I have to design the silencer from acoustic point of view as I have to consider the db level of the sound generated due to very high velocity flue gases.

 please tell me which ASME standard can I follow to meet the requirement from acoustic point of views.

thanks in advance,

 Regards,

Abhijit Nalawade.

 

Necking Analysis of Strain Softening Materials ...

Hi all.

I'm studying the high temperature viscoplastic behavior of titanium alloys. It is well known that at high temperature range, deformation induced dynamic recrystallization (DRX) causes dramatically strain softening. Such strain softening behavior is also treated as plastic instable according to literatures.

Journal Club Theme of Oct. 1 2008: Fluid - Structure Interaction, an overview of current trends and challenges

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Starting with a solid mechanics background, I have been recently interested in fluid-structure interactions for applications in biomechanics of soft-tissues; and thought that the iMechanica Journal Club forum would be a good opportunity to share my personal experience and start a discussion on this challenging inter-disciplinary subject.

PhD and Post Doc Positions

One post doc position and two PhD student positions are available immediately at Composite Vehicle Research Center, Michigan State University.

Research background in atleast one of the following key areas preferred

1. Experimental Mechanics

2. Composite Materials - Design, characterization or damage mechanics

3. Biomimetic Design - Analytical or Computational experience with interest in experimental validation

Postdoc research associate and PhD student positions available

One postdoc and several PhD student positions are available at Clarkson University. Research background in at least one of the following areas is preferred.

1. Fatigue and fracture of materials and structures, computational mechanics and numerical methods

2. Probabilistic methods, engineering statistics, random process theory

3. Structural dynamics, health monitoring, signal processing, system identification

About basics of FEM

I am mahantesh, i am doing Mtech in design engg.  please tell me which books or articles i have to reffer so that i get good and depth knowledg of Finite element method.

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