Hi All,
many a times in abaqus, we get numerical singularity warnings. which are mainly due to rigid body motion in one or more directions. This will generally happen when there is contact closing and opening phenomenon is happening. How can we resolve these numerical singularities? Please post if you have any additional information.
Thanks and Regards
Ravitej
I want to model torsion of a homogeneous hollow cylinder in ANSYS. I changed to cylindric coordinate system also. But each time I run the program the result is that of bending. I have attached the mac file and output file for reference. Please advise.
finish
/clear
/PREP7
!*
ET,1,SOLID92
!*
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,70e9
MPDATA,PRXY,1,,0.3
CSYS,1
CYL4,0,0,1, ,2, ,10
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hello all,
I am carrying out a metal forming simulation in ABAQUS using ALE with Explicit solver. I have used plastic properties of material. Though ALE are designed for mesh smoothening advection sweeps (that is ALE is supposed to take care of mesh smoothening); I am facing a problem. ABAQUS gives me an error "excessive element distortion".
I am trying to call VUSDFLD subroutine before VUMAT. I need to access some variables which are not available in VUMAT. Does anyone know how I can force ABAQUS into calling VUSDFLD before VUMAT? Thanks.
Ahmad
hello everybody
i want to develop a constitutive law for fiber reinforced composite. so i am using umat subroutine to simulate it in abaqus.
when i begin analysis i got error code 144.
my question is: is jacobian matrix DDSDDE can be to cause for this error??
and i read that i can use uhard subroutine for isotropic and combined hardening.
using this subroutine we can get yield surface from hardening curve, so we must enter some value in abaqus^material^(yield stress with corresponding strain)
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