Blog posts

Several questions for VUMAT

Submitted by meshfreer on Tue, 07/27/2010 - 02:49

Hi all, I am a new ABAQUS VUMAT user. Recently I try to define the matreial behavior in stamping of sheet metal through the VUMAT. there are several questions about VUMAT.

（1）accoring to the ABAQUS user manual，for plane stress problem，stressnew(nblock,ndir+nshr), where ndir=3,nshr=1, but in fact,there are 5 stress commponents: sigma_{11},sigma_{22},sigma_{12},sigma_{23},sigma_{31}. how to match stressnew(*,i)(i=1,2,3,4) with the stress commponents: sigma_{11},sigma_{22},sigma_{12},sigma_{23},sigma_{31}?

Good book(s) on beam and plate theory.

Submitted by priyadd84 on Mon, 07/26/2010 - 21:12

research

book

Hi all ... can somebody suggest me good book(s) on plate/beam theroy? The book should start for a novice and should go till large deformation part. Step by step explanation atleast for first few chapters should be there. Thank you.

Abaqus Help Needed for heat analysis in beams

Submitted by pkoonjul on Mon, 07/26/2010 - 17:49

Hello, I am trying to model a steel beam subjected to elevated temperatures using the ISO834 curve.

Wave-Structure-Foundation interaction (Fluid-Str-Porous Media int.)

Submitted by Anonymous (not verified) on Mon, 07/26/2010 - 16:54

Dear all,

can anyone direct me to litrature in which modelling the diffusion equation of fluid porous flow is unified with the free fluid flow. I mean that the porous media is considered deformable and equilibrium conditions are solved simultanouesly with diffusion eq. for porous flow and at the same time fluid velocities inside and outside porous media are linked together in a poroelastoplatic framework; where porosity and geometry are updated with each time step!

Thank you in advance!

Hisham El Safti

Finite Element Method.

Submitted by Gallardo560 on Mon, 07/26/2010 - 11:08

Finite element method.

Hello,

I would like to develop a Program for finding the Stiffness of a stabilizer bar using FE methods.

I have a fairly good idea about FE methods as to how to proceed but the books i referred to mostly dealt with symmetric solids.

Can someone throw light on FE procedure for such component with a complicated shape(or some books that deal with 3D assymmetric solids)..??

Thanks.

Drilling of CFRP-Ti stacks Simulation reg

Submitted by santhoshmurugan on Mon, 07/26/2010 - 04:48

hi everyone, i'm new to Abaqus software. i need to simulate the drilling process in abaqus software. can anyone help me out in it....

Paper of necking

Submitted by claudioacareglio on Sat, 07/24/2010 - 23:25

I am searching the paper "Evaluation of stress distribution in the symmetrical neck of flat tensile bars" of J. Aronofsky published at Journal of Applied Mechanics (1951).

ANSYS LS-DYNA time integration

Submitted by mechanicaldesign on Sat, 07/24/2010 - 19:56

Good afternoon,

I have a trouble when I want to made a simulation using ANSYS LS-Dyna, because first of all my model implicate couple 200000 elements, which means 2 parts in contact and second part which must interact with first 2 part.

I made a surface to surface contact using automatic contact. After that I made an array table where I put time (0,1) and accereration of gravity (0,9.81). Other applied constrants are on nodes where the component is fixed. So, I used for output frequency 50 .