nonlinear simulation in optistruct - plastic analysis

[ale_.93]

Bye to all,
these days I had to perform a rupture analysis of a component to dimensional it so that it does as a weak element and breaks under a certain load. I worked in hypermsh with the optistruct solutor.
I obviously performed non-linear field analysis going to insert the curve of the material.
I interpreted the results going to see the plastic strain of the stressed section and the tension that came out so I made a somewhat (let me pass the term) "manual" of the result, going to compare these values with the curve of the material.
This is because in the result I have achieved convergence even in cases where I have found deformations and therefore tensions that exceeded the breaking limit. can you tell me if there is hidden in some cards how to set a limitation in terms of strain and/or stress?
Thank you.

 

[Sampa]

which card did you use to model the material?
However in general should be there. I know a little radios.

 

[GiCor]

Hello, the only true stress curve - true strain of the material does not implement the fracture mechanism, ductile or fragile that is, which triggers at the level respectively microstructural or crystallographic leading then to the macroscopic breakage of the component. abaqus, in order to say of a mainstream commercial fem, allows to implement in addition to the true stress curve - true strain also various patterns of fracture, for example the gurson-tvergaard-needleman for the ductile fracture that allows to intercept the nucleation point of the microstructural voids that happens to a certain value of the true plastic strain obtained experimentally through standard comparable test, voids that then grow and a weak examination between their

 

[ale_.93]

which card did you use to model the material?
However in general should be there. I know a little radios.

I used mats1:
tid=table with the two values
type=plastic
typstrn=1