Drucker Prager Hardening model and Shear damage

[Vxxxxx]

Hi everyone,

First, I would like to ask about the conversion between compressive and shear yield strength.

is it possible to convert compressive yield strength to shear yield strength for D-P criteria?

Second, for shear damage, the fracture strain means fracture strain from a shear test or compression/tensile test? or any one of them?

Thank you very much.

 

[FEA way]

For such material models you need data from tests carried out with specific stress state induced in the sample. The following documentation chapters discuss this in detail for Drucker-Prager hardening and shar damage:
1) "Extended Drucker-Prager models —> Hardening and rate dependence"
2) "Damage initiation for ductile metals —> Damage initiation criteria for fracture of metals —> Shear criterion"

 

[Vxxxxx]

Okay thank you very much FEA way.