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Dear members,
I need some information about the implication or significance of J1 and J2 in granular materials not mathematical represantation which I have.Your feedback will be highly appreciated.Thanks in advance.
P = Mean stress or Hydrostatic stress = (σ11 + σ22+ σ33)/3
J1 = -3 * p
J2 = 1/6*{(σ11 - σ22)2 + (σ22 - σ33)2 + (σ33 – σ11)2}
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