bilinear constitutive law
bilinear constitutive law
(OP)
hello
Does anyone know how to define a bilinear constitutive low in Abaqus?
Does anyone know how to define a bilinear constitutive low in Abaqus?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
bilinear constitutive law
|
RE: bilinear constitutive law
It is very simple. First thing is to convert from engineering stress and strain to true stress and strain. Following formulas will help:
Stu=Su(1+e)
et=ln(1+e)
I think the symbols are self explanatory. ABAQUS asks for two points to define the bilinear curve. Of course one point (0,0) is already known. Therefore add the following points:
0, Sy
et, Stu.
Gurmeet
RE: bilinear constitutive law
but i didnt find a material that can define it.i can only approach it by an hyperelastic material. How can we enter the curve except by a subroutine?
Lina
RE: bilinear constitutive law
Gurmeet