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Drucker Prager model

Drucker Prager model for Silicon dioxide powder in ABAQUS

Submitted by Hui.Chen on
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Drucker Prager model
Cap model

Hallo, everyone,

I am PhD student in material processing. I have a project of using silicon dioxide powder as forming media for tube hydroforming process. I read some literatures about the material model of granular materials. It seems that the Cap model in ABAQUS should be suitable for prescribing the material behavior in FE model. But it is not easy to do the triaxial test for silicon dioxide powder.

Could anyone help on Drucker-Prager model?

Submitted by Botao on
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Plasticity
Drucker Prager model

I am using exponent Drucker-Prager model at the moment, is there anyone can tell me where the follow exponent D-P eqation comes from originally?

(σ e)(σ e)=λ(σt)(σt)-3(λ-1)σmσt

Where λ= is hydrostatic stress sensitivity parameter and equal to σc/σt, σe is effective stress, σm is hydrostatic stress, σc, σt are stresses under compression and tension, respectively.

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