research

Plastic strain data

Submitted by Shabeer Khan on Fri, 02/04/2011 - 13:05

Dear All

I am working on Abaqus simulation for thermo-visco-plasticity, especially on necking problem in circular bar.

I need the plastic strain data to add in the material properties table of Abaqus.

And, any help in this regard would be appreciated.

Thanks

Shabeer Khan

MSc Computational Mechanics

Plotting the Johnson-Cook strength model

Submitted by HS_impact on Thu, 02/03/2011 - 21:59

research

Plasticity

materials modeling

Johnson Cook Plasticity Model

Johnson Cook Model

I'm trying to plot the stress-strain curve described by the Johnson-Cook strength (and eventually damage) models. The strength model is defined as:

σ=[A+Bεⁿ][1+C ln(ε_dot*)][1-T*^m]

where A, B, C, n, and m are material constants, ε_dot* is the non-dimensionalized strain rate, and T* is the homologous temperature where T*=(T-T0)/(Tmelt-T0)

Journal Club February 2011: Challenges of Fluid-Structure Interaction Problems Involving Incompressible, Viscous Flow

Submitted by ylyoung on Wed, 02/02/2011 - 16:56

research

fluid-structure interaction

Reliability and engineering mechanics

Submitted by Biswajit Banerjee on Tue, 02/01/2011 - 01:20

The word "failure" can mean different things to different people. Over the past couple of years, my interactions with various groups from industry has shown me that for some people failure means catastropic fracture/buckling while for others it can mean highly localized plastic yielding. Even for relatively simple sandwich composite structures, there is no clearly agreed upon definition of the word.

UMAT code for crystal plasticity

Submitted by Panos Efthymiadis on Mon, 01/31/2011 - 17:14

research

Crystal plasticity

UMAT code

Dear all,

I would like to ask you something about prof.
Huang's subroutine. I want to verify the code, by using published
stress-strain data. But when I am plotting my stress -strain curve I am
always getting a straight line instead of a curve that shows the hardening effect. What could be a reason for this problem?

Regards,

Panos

p.s. I am using a single crystal, single element, and only modify the crystal orientation

IOSO Multiobjective Optimization Technology for Research and Investigations Program

Submitted by IOSOnier on Sun, 01/30/2011 - 19:12

Hello,

We start a three-year program for academician researchers, PhDs and etc. We suppose that our multiobjective IOSO optimization technology may help you in your research and investigations.

What we offer for you:

Academic licenses of unique and powerful design optimization software based on IOSO optimization technology for free.

What we anticipate from you:

References to IOSO in your publications, conference presentations and other types of your research results.

Plastic Collapse for a pressurised vessel

Submitted by Jad Antonios Jelwan on Sat, 01/29/2011 - 05:15

research

damage plasticity

Hi there ,

I'm a researcher from UNSW sydney .

I'm working on the elastic-plastic-creep based on the exhaution of energy density.

I've came with a new idea for plastic collapse ,which is based on the exhausion of enrgy .

The work is not yet publish , because I would like to ask your help here .

Does anyone know or would like to help me to have an APDL file for plastic collapse analysis in ANSYS

Thanks for advance

JOEFFREY

Convergence Analysis of the Wolf Method for Coulombic Interactions

Submitted by arash_yavari on Fri, 01/28/2011 - 20:09

research

A rigorous proof for convergence of the Wolf method for calculating electrostatic energy of a periodic lattice is presented. In particular, we show that for an arbitrary lattice of unit cells, the lattice sum obtained via Wolf method converges to the one obtained via Ewald method.