Blog posts

Double effective stress of porous media (by Li chuanliang)

Submitted by S.H. Zhu on Wed, 09/15/2010 - 12:32

opinion

At present, the concept of effective stress has undergone three periods:

1. Terzaghi's effective stress

σ_eff= σ-p

2. Biot’s effective stress

σ_eff= σ-αp

3. Double effective stress

Applying Cyclic Load in ANSYS

Submitted by tzirakian on Wed, 09/15/2010 - 04:06

Any ideas/references/examples on how to apply cyclic loading in ANSYS?

Discrepancy of numerical results from analytical solution for an nonlinear viscoelasticity model

Submitted by aquis_mech on Tue, 09/14/2010 - 19:05

software

nonlinear viscoelasticity

I have written a Fortran code for nonlinear viscoelasticity according to the Hughes' recurrence algorithm based on a total Lagrangian formulation. And a relaxation test is made. There is some deviation from the analytical solution(Theoretically the stress response should be an exponential decay plus a constant, isn't it?). The numerical ultimate stress is larger than the analytical one. As a larger initial strain is applied, the deviation is smaller. For a inital strain of 10%, there is almost no difference between the num. and analy. solution. What can account for this?

Full Professorship in Mechanics - TU Dortmund/Germany - Mechanical Engineering

Submitted by andreas.menzel… on Tue, 09/14/2010 - 10:28

job

The Technische Universitaet Dortmund in Germany is advertising a full professorship (W3) in Mechanics in the Institute of Mechanics at the Faculty of Mechanical Engineering.

S-N curve

Submitted by basak.pradip on Tue, 09/14/2010 - 06:35

education

Plasticity

I am working on plastic behaviour of metal. I am using Abaqus 6.7 for simulation of uniaxial ratcheting of steel under cyclic loading. Modelling and job submission/completion has been done successfully. But I cann't understand where the data for Stresses(S) & number of cycle(N) is strored to draw S-N curve. Please suggest.

Contact and XFEM?

Submitted by mikechy on Mon, 09/13/2010 - 23:51

contact

pre-stress

cohesive/XFEM

Hi,

Initially, I asked this question to the Yahoo Group COMSOL
(FE package for multi physics simulation) because I thought, that there I
can find someone who is familiar with both COMSOL and Abaqus.
Unfortunately, among the experts of COMSOL I did not find an expert in
Abaqus.

COMSOL has an example 'Tube Connection' - a flange with four prestressed
bolts is subjected to tensile forces. To compute the influence of the
tensile force on the stress level in the bolt, the model includes a

Compression-after-impact response of woven fiber-reinforced composites

Submitted by Arun Krishnan on Mon, 09/13/2010 - 15:27

We have conducted an integrated experimental and numerical analysis to study the compression-after-impact (CAI) response of woven fiber-reinforced composites.

Hourglass reduced integration

Submitted by adarshchatra on Mon, 09/13/2010 - 12:37

Hourglass reduced integration

Hi,

What is the meaning of hourglass reduced integration used in ABAQUS.

Hourglass stifness?

Reduced Integration?

Thank You very much in advance

Conference on Sustainable Construction and Design

Submitted by Reza Talemi on Mon, 09/13/2010 - 11:40

conference

On 16 and 17 February 2011 the Conference on Sustainable Construction and Design will take place. This event now comes to its third edition. Coming from a one-day event (called "Day of Research") where the research of our industrial and academic partners was presented, the conference has now grown to a scientific platform where the industrial and academic communities can exchange the latest research developments in following fields: