Blog posts

Postdoc Position - Additive Manufacturing (University of Pittsburgh) -- January 2016

Submitted by ravishm on Mon, 08/03/2015 - 18:23

job

POSTDOCTORAL ASSOCIATE POSITION

Department of Industrial Engineering

University of Pittsburgh

Journal Club Theme of August 2015: Nonlocality and yield in granular materials

Submitted by David Henann on Mon, 08/03/2015 - 17:21

Introduction:

how can the plastic strain be greater than unity?

Submitted by student on Mon, 08/03/2015 - 13:39

Does anyone know how can the plastic strain be greater than unity? Such as in the benchmark manual 3.2.10 Indentation of a crushable foam plate:

*CRUSHABLE FOAM HARDENING

0.2000E6, 0.0000

0.2577E6, 0.0094

0.2760E6, 0.0258

0.3053E6, 0.0452

0.3267E6, 0.0655

0.3623E6, 0.1084

0.3891E6, 0.1540

0.4250E6, 0.2405

0.4568E6, 0.3812

0.4738E6, 0.4600

0.5170E6, 0.6391

0.5862E6, 0.8570

0.6503E6, 0.9857

Errors in FRANC3D software

Submitted by Mojtaba1990 on Sun, 08/02/2015 - 14:36

Hello to all,

My project is crack propagation in expander wheel.

I did static analysis in abaqus and i used FRANC3D for crack modelling.

I insert crack in FRANC3D, surface meshing is done but not volume meshing.

It gave me this error:

backtracking stagnating: restarting contraction

What is this error?

Can anyone help me?

I attach 2 pictures. First picture shows the meshing and another shows crack location.

In crack location i have two seed size of elements because of model geometry.

PhD Opening-Fall 2015 (position closed)

Submitted by Nastaran Ghazi on Fri, 07/31/2015 - 15:19

job

(Use the subject line: F15 Candidate)

Contradiction in calculating Logrithmic strain from ABAQUS

Submitted by student on Fri, 07/31/2015 - 09:14

Hi,

I am trying to extract logrithmic strains from Abaqus and then trying to compare with the experimental ones but I am getting different results. I found out the in Abaqus it uses slightly different formula then what I use theoretically.

In abaqus it computes LE from the following formula:

LE = plastic strain - true stress/E

But what I believe is that it should be like:

LE = plastic strain - yield stress/E

Can any one highlight why abaqus is using the first formula for LE calculation?

Positions in CAEP Software Center for High Performance Numerical Simulation (Beijing, China)

Submitted by Rong Tian on Fri, 07/31/2015 - 01:51

The newly setup "CAEP software center for high performance numerical simulation", located in Beijing, China, is recruiting.

The center is focused on large-scale numerical simulation on petaflops systems such as Tianhe-2 etc.

The R&D of the center spans broad areas of high performance numerical simulation including preprocessing (CAD, mesh generation), parallel visualization, high performance middleware, computational mechanics (nonlinear FEM, GFEM/XFEM, SPH/MPM), mental and energetic materials, nuclear physics, electromagnetics etc.