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UMAT

Pordon me if i couldn't reach my intention correctly. 

You know that I have the functional dependence. For every elastic plastic property I have its termal function.

for example:

E=E(T), NU=NU(T), Syield=Syield(T).

But my question is that is it correct to define:

T=temp 

and then

write Those function as props 

Props(1)=E(T), etc.

or I ought to dedine the properties at several temprature separately and then define the strains and stresses respectively??

for example:

at T=T0

E=(*), NU=(*), etc.

at T=T1

E=(*1), NU =(*2), etc.

my main propblem is that my termal functionality is parabolic form and is not linear which can define at two point.

sorry for that, i think it's because I don't have its ability in english as much as enough I have to be to reach my intention.

thank you in advanced

sincerely 

 

 

 

Comments

Frank Richter's picture

*ELASTIC
Data lines to define isotropic elasticity (TYPE=ISOTROPIC):
First line:
Young's modulus, E.
Poisson's ratio
Temperature

*PLASTIC
First line:
Yield stress.
Plastic strain.
Temperature.


You provide data points under these two commands, sufficiently close to approximate the functional dependence.
No subroutine required.

------------------------------------------
Ruhr-University
Bochum
Germany

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