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Convergence problem of cohesive element in abaqus

Submitted by Guodong Guo on

Hello, 

Would there will be anyone like to share the experiences of using cohesive element in Abaqus. Recently I come across some trick proplems while using the cohesive element with bilinear cohesive law to model the slide of interface.

First,I don't know if there is a exact meaning of the stiffness, but it seems that it is related to the convergence. After many times of trial, I find I can only get a convergent result by using a couple of values. Nevertheless, I don't know the meaning of the stiffness.

quasi-static indenation test simulation in ansys Question ?

Submitted by Ahmed wagih on

Dear all,
 
I have aproblem with contact peoblem.
I am working in indentation in composite laminate plate the simulation was done using ANSYS. i define surface to surface contact between the rigid indneter and the laminate plate. then, a small displacemnt is applied to the indenter (.005mm) to check the conatct condition.
THE problem?
 
when applying this small displacemnt i get very large penetration of indneter in the specimen. and i don't know why?
 

Postdoc position in Solid Mechanics at Lund University, Sweden

Submitted by HHallberg on
job
computational mechanics
computational materials science

The postdoc position is mainly focused on
development of advanced computational models of microstructure evolution
in metallic materials, with particular focus on recrystallization and
related phenomena. Some experimental activities may also be part of the
work.



The employment is for one year with a possible extension to two years.

A more detailed job description and procedures for
application can be found here .

Adding static/dynamic library to an Abaqus user subroutine

Submitted by salingerv on
UMAT
Abaqus subroutines



I want to use an external subroutine in my umat but I have not been able to do that so far. Having created a dynamic library project in Visual Studio 2008, I have created a .dll and .lib files and copied the .lib file into the working directory of my abaqus job and the .dll file to exec folder. I have also added the directory of the .lib file in the LIB environmental variable. But I get these errors from ABAQUS: 



[quote]LINK : fatal error LNK1181: cannot open input file 'Dll2.lib' 

Nonlinear analysis using ANSYS

Submitted by Anonymous (not verified) on

 

Hi ,

 

I am performing a nonlinear analysis (ANSYS) of GRP pipe which is subjected to diametral compression ,

 i am appling a line load in steps of 0.05 increments until load  reaches a maximum value  of 40kN in  20 steps 

i have got convergence till 13 steps but unable to get convergence in next further steps , i am getting error as LSSOLVE looping is stopped because solution is unconvergent and NCNV, 1set

  

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