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2D Contact Problem In AINDA84

Submitted by chenjinghao on

ADINA84 is an open source code which can solve contact problem.

My model is shown in the picture below:

 

Pipeline and seabed are both 2D 2-node beam element and seabed is rigid surface.

I define one contact pair,two contact surface and each surface has 99 nodes .Two surface's nodes have same coordinate.

The program'erro is"CONDITIONS OF CONTACT INADMISSIBLE DUE TO DETECTION OF GROSS OVERLAP".

 Who can tell me the reason?

Several questions for VUMAT

Submitted by meshfreer on

Hi all, I am a new ABAQUS VUMAT user. I am defining the material behavior in stamping of sheet metal through VUMAT. But 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}?

Several questions for VUMAT

Submitted by meshfreer on

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}?

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

Submitted by Anonymous (not verified) on

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