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Postdoctoral position - nonlinear dynamics

Indian Institute of Technology Gandhinagar (IITGN) invites applications for a postdoctoral position from motivated individuals interested in modeling and simulation research in Nonlinear Dynamics (supervised by Profs. Pratyush Dayal and Gaurav Srivastava). These applications are sought under Post-Doctoral Fellowships Program of IITGN. The candidate will be required to develop a fully functional suite of computational tools to perform multiphysics modeling and simulation studies on soft materials.

Amit Pandey's picture

Seminal research work: in-situ mechanical testing under electron microscope

A lot work has been done/published in the area of in-situ mechanical testing using electron microscopy. Please list which, according to what you feel has had a significant impact. Here are two in my opinion:

 Uchic, M. D., Dimiduk, D. M., Florando, J. N., & Nix, W. D. (2004). Sample dimensions influence strength and crystal plasticity. Science, 305(5686), 986-989.

iMechanica has been upgraded

Harvard IT has recently upgraded iMechanica to a new server.  In addition, iMechanica is now powered by a new version of Drupal.  These changes may affect your use of iMechanica.  Please let us know if you find something wrong.  Thank you.

Zhigang Suo's picture

Bioinspiration and biointegration

The nervous system has long been an inspiration for the engineer.  Here is an example in a popular textbook on neuroscience.  When a person steps on a nail, the sensor in his foot sends a signal to his brain, the brain sends a signal to his muscle, and he lifts his foot.  The example illustrates the sensor, actuator and processor in the nervous system.

EPFL - Faculty position in Structures and Materials

Faculty position in Structures and Materials


postdoctoral position - isogeometric analysis

IMATI-CNR and the Mathematics Department of the University of Pavia offer a postdoc position on isogeometric analysis. This research project focuses on the design and implementation of innovative isogeometric methods for solid/fluid mechanics.  In particular the target applications are related to

- nearly-incompressible and fibered materials

- fluids in geological formations

This research project is partially supported by the private sector, and is supervised by Annalisa Buffa and Giancarlo Sangalli.

Looking for a Postdoc position in the filed of vibration aided fault diagnosis

I am going to finnish my Ph.D. of mechanical engineering with a thesis in the field of vibration assisted fault diagnosis in about 3 months. My main field of research is vibration and I have worked extensively on gear systemes vibration modeling and diagnostics. 

Currently I am looking for a postdoc position at which I can continue my researches in the abovesaid fields.

my Email address is


Cohesive Zone Model in ANSYS

Hello Everyone,

I am trying to model a propagation of fluid-driven crack in ansys apdl and I have the following questions:

positional finite element

hello Dear friends

positional fem is introduced by H.B. Coda for studing geometrically nonlinear analysis of 2D beam. I need some information about implementing of this there anaone who can help me.

best regards.

VUMAT of Drucker Prager, help needed please..

Hi Everyone,

                    I have written Drucker Prager in VUMAT version as shown below..but still there are some deviation with the original in built version of ABAQUS. I have all the notes how i derived these equation.could you please show me where the code has gone wrong or have i missed a critical point in here..i tried my best to spot the error but could not..may be you all experts could find it. Thank you very much. 


subroutine vumat(

c Read only -

     1  nblock, ndir, nshr, nstatev, nfieldv, nprops, lanneal,

Vadim Silberschmidt's picture

Lecturer in Mechanics of Materials - Loughborough University, UK

Loughborough University, UK - Wolfson School of Mechanical and Manufacturing Engineering Lecturer in Mechanics of Materials / Full Time Salary: £34,233 to £45,954 Closing date: 17 August 2014 The School is one of the largest and most successful engineering departments in the UK. Applicants should hold a Doctorate or equivalent experience in Engineering, Computational Mechanics or a related discipline.

mmalekan's picture

Run Abaqus from a Java code

Dear all:


Is it possible to run Abaqus from a Java code? or is there any communication way between Abaqus and Java?

I want to simulate a simple problem and pass some info from Abaqus to Java code and vice versa.



M. Malekan


XFEM for crack propagation


I am new in Abaqus XFEM and I am stuck at geting a crack propagation in XFEM ,working for my Master thesis, the crack doesnt propagate. In some examples its gets opened/widened, but its not propgating.

Can any one please advise me on this or help me with simple input file for checking.

I have attached a input file of mine , it owuld be of great help if someone could have alook and advise.

Thanking in advance



Andres Lahe's picture

EST method with GNU Octave

The EST method -- -- is a general computational method, for solving boundary value problems for the structural analysis of frames, beams, and trusses. Differential equations are considered here together with a set of boundary conditions.  Compatibility equations for joint displacements and equilibrium equations for member end forces at joints serve as boundary conditions.

Case Study Effect of Pore Size on Pellet-Based Catalyst Flow

We have a new case study on our website based on research at Imperial College into multiscale tomography and calculating permeability for catalysts. The project involved studying the influence of pore structure on fluid flow across large length scales in silica-alumina pellet-based catalysts.

3D data at different length scales was obtained from XMT, DBFIB-SEM and ET scanning and segmented into a binarised dataset.

W. Brocks's picture

elastic follow-up

This is the story of threefold failure, which doubtlessly is the subject of fracture mechanics, a story of failure in various regards, however. First, it comments on an article dealing with failure assessment, second it reports on the personal failure of the blogger to understand this article, and finally it bemoans the failure of a seminal idea.


corotational concept

hello Dear friends

I have one question about corotational concept. is it possible to obtain tangent

stiffness matrix by TL approach and updating degrees of freedom(including displacement and

rotation by corotational. please aware me of related papers.

best regrads



Abaqus Fictitious Surfaces for Beams -- Help


Hello. Looking to create a fictitious surface around an Abaqus model that uses beam elements for the purpose of transferring pressure loads from CFD to the beam. We are restricted to using beam elements; indeed, structure is a very long and thin beam.  

What is the easiest way to do this?

Most grateful for your help.

atefe.geramian's picture

keywords error in vumat

Dear all,

     I constructed a VUMAT subroutine which including 4 state dependent variables, so I wrote "*Initial Conditions, Type=Solution" in keywords. But, when I run the simulation I get this error:

in keyword *PERMEABILITY, file "Job-vumat2.inp", line 102: The keyword is misplaced. It can be suboption for the following keyword(s)/level(s): material


Analysis Input File Processor exited with an error.

    Could anybody help me? Thanks a million.

    I copy my keywords as follows.

Fan Xu's picture

3D finite element modeling for instabilities in thin films on soft substrates

Spatial pattern formation in stiff thin films on compliant substrates is investigated based on a nonlinear 3D finite element model. Typical post-bifurcation patterns include 1D sinusoidal, checkerboard and herringbone shapes, with possible spatial modulations, boundary effects and localizations. The post-buckling behavior often leads to intricate response curves with several secondary bifurcations that were rarely studied and only in the case of periodic cells.

Lallit Anand will receive the 2014 Drucker Medal

Lallit Anand will receive the 2014 Drucker Medal.  There will be a symposium in his honor at the International Mechanical Engineering Congress & Exposition, 14-20 November, Montreal, Canada.  See you there.

WaiChing Sun's picture

AGU Fall Meeting Session: Digital Rock Physics and 3D Printing

Dear Colleagues, 


   I want to invite you to submit abstracts to our session "Digital Rock Physics, 3D Printing and More" in the upcoming AGU Fall Meeting at San Francisco, December 15th to 19th, 2014. The details are listed below. 


Best Regards,




Session ID#: 3129


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