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sandeep@iit_guwahati's picture

A new time integration scheme for dynamic problems

An extension to an implicit time integration scheme of Silva and Bezerra has been proposed . It is proposed to combine the Newmark scheme with the three point backward Euler scheme to have more user controlled numerical properties like high frequency dissipation. Also, the stability, accuracy, and dissipation of the proposed scheme have been studied. This is achieved by studying the spectral radius, period elongation, and amplitude decay.

A PHD position in QCM-based gas sensors

A PHD Research Assistantship is available in the Department of Material Science and Engineering, University of North Texas-Denton in the fields of modeling and experiment of QCM (Quartz crystal microbalance)-based gas sensor. The position will start from Spring, 2016. Candidates should have a Bachelor/Master's degree in engineering mechanics, mechanical engineering or electrical engineering with good academic standing and should have some experiences in the following:

Crushable Foam Model Calibration


I am currently facing difficulties in calibrating abaqus crushable foam model with my experimental results.
I think I am bit confused about what values needs to be input in the model. 
Right now my elastic properties are: E=400 MPa, v=0 (because its crushing)
In plastic under crushable foam I use compression yield stress ratio =1
and hydrostatic yield stress ratio =0.1.

Yuhang Hu's picture

1st Midwest Mechanics of Materials and Structures workshop at UIUC campus on Aug. 26th 2015

The departments of Mechanical Science and Engineering and Civil and Environmental Engineeing at University of Illinois Urbana Champaign will be cohosting the first Midwest Mechanics of Materials and Structures workshop at UIUC this Summer (Aug. 26th, 2015).

BICTAM Short Course on Insights from Nanomaterials in Beijing in Aug. of 2015

An intensive three-half-day short course on nano materials will be organized by BICTAM from August 11th to 13th in Beijing this summer.

OA Journal—Theoretical & Applied Mechanics Letters Volume 5, Issue 4 online now!


Dear everyone,

The third issue in 2015 (Volume 5, Issue 4) of Theoretical and Applied Mehcanic Letters (TAML) is now online.

Welcome to this OA journal or for rapid publication of your exciting results. 


OA Journal—Theoretical & Applied Mechanics Letters Volume 5, Issue 3 online now!

Dear everyone,

The third issue in 2015 (Volume 5, Issue 3) of Theoretical and Applied Mehcanic Letters (TAML) is now online.

Welcome to this OA journal or for rapid publication of your exciting results.


How to determine the Centre of rotation in Abaqus/CAE

I need to determine the centre of rotation of the head of the femur and acetabular bones using Abaqus.
How can I find the centre of rotation for a sphere and a concave surface (the head of the femur and acetabulum bones) in Solid Edge?

Thank you.

bitamendi's picture

Looking for a VUMAT programmer to share publication with

Dear researchers,


I’m Joseba Mendiguren, researcher at the Advanced Manufacturing Group of Mondragon Unibertsitatea. I’m currently working on advanced yielding/hardening models for metals.
I’m in the middle of a paper writing work but I cannot find time to sit down and program the VMAT that I need to run some simulations for the paper. I’m looking for a VUMAT programmer researcher willing to work on the topic and share the publication authorship on return.

Ductile crack modeling with XFEM and Damage criterion in Abaqus

Good mourning, i'll ask a quick and strightforward question abour Abaqus fracture analysis capabilities, in case of a crack in a ductile material, when one want to use arbitrary path crack propagation with XFEM, what's the suitable damage initiation criterion to use for this case?

Node rotation in UEL definition

Hi everyone,

I'm working on UEL and recently I've developed a shell element. To define an element in input file, I'm using counter-clockwise rotation for nodes. When it's just one element everything is good.

exponential softening cohesive zone (ABAQUS)

Hi everyone,

what is the exponential curve used in ABAQUS to model the softening (damage evolution) for cohesive interaction? Reading the documentation, I find the equation for D (damage variable) in linear and exponential cases. But the exponetial curve is not given there (maybe it is not given explicitly).



Dargazany's picture

PhD position in Mechanics of High Performance (bio)Materials

Our Group of High Performance Materials in Enviormental & Civil Engineering Department at Michigan State University has an openings for PhD positions to work on Multiscale Modeling of Soft Materials starting Spring 2016.


Clarification on creep


My work is related to creep in ceramics. Often I find the relation between the creep strain rate and stress as:

creep_strain_rate = constant x stress x other_factors                  (1)


"stress" is a general term here. Sometimes this relation (1) is applied along the principal stress direction; stress then refers to principal stress. In other cases stress is used to represent the effective stress which is expressed as following (not sure if this is complete/correct definition):


Giorgio Carta's picture

Dynamic response and localisation in strongly damaged waveguides

In this paper, we investigate the formation of band-gaps and localisation phenomena in an elastic strip nearly disintegrated by an array of transverse cracks. We analyse the eigenfrequencies of finite, strongly damaged, elongated solids with reference to the propagation bands of an infinite strip with a periodic damage. Subsequently, we determine analytically the band-gaps of the infinite strip by using a lower-dimensional model, represented by a periodically-damaged beam in which the small ligaments between cracks are modelled as ‘elastic junctions’.

Acta Mechanica Sinica's picture

Theme Articles on Micromechanics may Interest you ——Published on Acta Mechanica Sinica

Dear everyone!

Welcome to theme articles on Micromechanics published on SCI-indexed journal


Theme Articles on Micromechanics

Guest editors: Qi-Chang He, Geng-Kai Hu

Can Ayas's picture

Postdoc position in computational mechanics

A postdoc position on process modelling of additive manufacturing is availble in Delft University of Technology in the Netherlands. Please see the attached document for details and how to apply. 

Ask for Hosford and AH. Cottrell book

hello Dear friends

for doing my phd thesis I need two books titled" mechanic of crystals and textured polycrystals" from W.F. Hosford and " dislocation and plastic flow in crystals" from AH. Cottrell. if anyone has these books please send for me or direct me to related links.

best wishes.

Dincoz's picture

Could you tell me know which criteria if satisfied, the abaqus give this error "one of your elements distorted excessively"?

For test reasons of abaqus work, I have defined my material properties (stress-strain behaviour) up to strains of 15! However, even in this condition some of my elements reaches this strain value and distorted. I want to know which calculation the abaqus software is using to report a distortion error? 

Actually can we define our material behaviour in a way that, it would not distorted at all?




Zhigang Suo's picture

Friends of Extreme Mechanics Letters

When I traveled in China in June, I was once again irritated by the Internet.  It was often slow and broken.  Many important services are inaccessible, blocked by someone.  Why would someone do that?

But I found my Chinese colleagues extremely well interconnected.  Everyone has a cell phone.  They actually use their cell phones!  

2 PhD positions in Rock Mechanics at The University of Adelaide

We are seeking 2 highly motivated PhD candidates for a research project supported by Australian Research Council (ARC) with an Industry partner, OZ Minerals, based in South Australia.

TongLi's picture

PhD position at QUT (Australia) Biomechanics

Phd student position in 'Multiscale Modelling for the Biomaterial/Protein Interaction' currently exists in the Modelling&Simulation Group at Queensland University of Technology.

Shanghai University Overseas Job Fair

Shanghai university launched a new recruitment program (see attached file), which aims to recruit top global talents. Both full time and part time applications are welcome.

People from mechanics and related fields, who are interested in the program, are kindly invited to send me an email (


Frederick Gosselin's picture

Focus Session on Reconfiguration at APS/DFD in Boston (Nov. 22-24, 2015)

Dear colleagues,
We would like to bring to your attention the upcoming Division of Fluid Dynamics Meeting of the American Physical Society in Boston, MA (Nov. 22-24, 2015). We are pleased to announce that we are organizing a Focus Session on Reconfiguration. We thus invite you to submit an abstract and come present your work in Boston.


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