iMechanica

TitanX is strengthening its numerical simulation capabilities. As part of this process, we are looking for two additional FE Analysts.

The exact scope and location of each position can to some extent be adjusted, function of the applications we will receive. We therefore encourage anyone looking for new challenges and exciting opportunities in the field of simulation to send their CV to our Group Simulation Manager, Jean-Baptiste Leydet. E-mail: jean-baptiste.leydet@titanx.com

Please, give a look to my research activity at: http://www.ing.unitn.it/~bigoni/

If you are strongly motivated to work with a very active group (http://ssmg.unitn.it) in Solid Mechanics, we have a post-doc position for 2 years available not before October 2012.

The position is on a EU grant (http://intercer2.unitn.it/) and is addressed to constitutive/numerical/theoretical modelling of ceramics.

For details on the application see:

Applications are invited for a Post-Doctoral position in Isogeometric Analysis at the University of Pavia. 

The ninth biennial International Conference on Fatigue Damage of Structural Materials IX will be held in scenic Cape Cod at The Resort and Conference Center at Hyannis, Massachusetts from the 16 - 21 September 2012.

Register today to book your place at this prestigious conference, which has attracted over 290 abstracts. The conference will bring together delegates from around the world to discuss how to characterize, predict and analyse the fatigue damage of structural materials.

There is an immediate opening for a Ph.D. student in the Department of Materials Science and Engineering at Missouri University of Science and Technology (Missouri S&T - formerly University of Missouri-Rolla). The Metallurgical Engineering program at Missouri S&T is one of the largest and most respected in the U.S. (http://mse.mst.edu).

The Ph.D. research project is about developing a coupled phase-field crystal plasticity model for predicting stress-strain-microstructures relations during deformation.

Attached herewith a classical paper by Hart on introducing a concept of constant hardness curves refuting that absolute strain should not be considered as a state variable.

The interesting part is he uses a stress relaxation test to prove the same. Stress relaxation test, here refers to a tensile test, where the test is stopped after say certain amount of plastic deformation. The stress drops a little, but the total strain is constant. However, it is argued that there is a small inelastic deformation, which is the cause of this load or stress drop.

please help me on selection of enrichment function for modeling of hole in XFEM and how to added the additional degree of freedom to the enrichment nodes and also on implementation of XFEM please help me

Thanks in advance

New book on Damage and Failure in Composite Materials written by Prof. Ramesh Talreja (Texas A&M Univ.) and Prof. Chandra Veer Singh (Univ. of Toronto)

Publishers:  Cambridge University Press.

ISBN:9780521819428

20% discount code: EN12DFCM (Offer expires 7/1/2013)

Visit www.cambridge.org/us/9780521819428

1 PhD student position is open in the Department of Mechanical Engineering (MEK), Technical University of Denmark (DTU).

Hi,

In a novel design of lithium-ion batteries, hollow electrode particles coated with stiff shells are used to mitigate mechanical and chemical degradation.  In particular, silicon anodes of such core-shell nanostructures have been cycled thousands of times with little capacity fading.  To reduce weight and to facilitate lithium diffusion, the shell should be thin.  However, to avert fracture and debonding from the core, the shell must be sufficiently thick.

Hi Everybody, 
I'm using Mohr-Coulomb with Cohesion Hardening  in Abaqus and I'm wondering how can I postprocess the state of Cohesion in the field?

Tanks ahead,
-Ali
 

Dear all,

Could anyone help to give me some advice on how to implement a kind of nonlinear interaction relevant to relative velocity in ABAQUS? The interaction force has a quadratic function with the relative velocity between two nodes. Thanks.

Hi all,

How to check normals for 3D elements in abaqus 6.11

when all the inclusions with similar shape are embeded into the matrix, the 
 Mori_Tanaka effective Stiffiness/Compliance Tensor can be , respectively, given by

L ={∑cr(L0*+Lr)-1}-1-L0*

M={∑cr(M0*+Mr)-1}-1-M0* 

where,

L0*=L0(S0-1-I),

M0*=[(I-S0) -1-I]M0

Can anyone show me  the
 positive definiteness of the Stress Polarization Tensor  Pijkl, i.e.,

τij* Pijkl τkl*≥o,

and further, 

τij* Mijkl τkl*≥τij* Pijkl τkl*,

where, 
Mijkl is the elastic compliance tensor,  τij* is arbitrary stress polarization with τij*=−Lijkl  εkl*.

Many many thanks.

Dear
Colleagues & Friends:

International Journal of Computational Materials Science and Engineering (IJCMSE) is a
quarterly journal which aims to promote international exchange of new knowledge
and recent developments in all aspects of computational materials science and
engineering. By this means, we would like to invite you to contribute to IJCMSE
with your forthcoming research manuscripts.

Dear colleagues,

I kindly ask for advice on the following problem:

I simulate the uniaxial compression of a heterogeneous cylinder representing bone. Thus, it is not the visible solid exterior rim of the bone, but represents a porous structure within the bone, so-called trabecular bone, see the figure underneath.

The simulation is done in ABAQUS. The sample contains 164175 elements of type C3D4. The heterogeneous, porous structure makes it impossible to use axisymmmetric elements. The constitutive behavior is ELASTIC.

hi all,

        i am very new to abaqus and i want to simualte sliding wear between a pin and a disc. i found from the literature that by using user subroutines we can calculate the wear. i am not getting how to use a user subroutine , can any one expain how to use user subroutines in the CAE. is there any simple example problems in understanding this user subroutine functions. thanks in advance.