Damage criteria |
If D=1, then failure. If 0≤D<1, D then no failure.
With D=Max(F1,F2,F3,F4)
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If D=1, then failure. If 0≤D<1, D then no failure.
With D=Max(F1,F2,F3,F4)
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Tensile/shear fiber mode |
F1=(⟨σ11⟩σt1)2+(σ212+σ213σf122) |
F1=(⟨σ11⟩σt1)2+(σ212+σ213σfa2) F2=(⟨σ22⟩σt2)2+(σ212+σ223σfb2)
With, σfa=σf12,σfb=σf12σt2σt1
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Compression fiber mode |
F2=(⟨σa⟩σc1)2 With σa=−σ11+⟨−σ22+σ332⟩
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F3=(⟨σa⟩σc1)2 With σa=−σ11+⟨−σ33⟩
F4=(⟨σb⟩σc2)2
With σb=−σ22+⟨−σ33⟩
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Crush mode |
F3=(⟨p⟩σc)2 With p=−σ11+σ22+σ333
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F5=(⟨p⟩σc)2 With p=−σ11+σ22+σ333
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Shear failure matrix mode |
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F6=(σ12σm12)2 |
Failure matrix mode |
F4=(⟨σ22⟩σt2)2+(σ23S23)2+(σ12S12)2 Where,
S12=σm12+⟨−σ22⟩tanϕS23=σm23+⟨−σ22⟩tanϕ
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Delamination mode |
F5=S2del⎡⎣(⟨σ33⟩σt3)2+(σ23˜S23)2+(σ13S13)2⎤⎦ Where,
S13=σm13+⟨−σ33⟩tanϕ˜S23=σm23+⟨−σ33⟩tanϕ
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F7=S2del⎡⎣(⟨σ33⟩σt3)2+(σ23S23)2+(σ13S13)2⎤⎦ Where,
S13=σm13+⟨−σ33⟩tanϕ˜S23=σm23+⟨−σ33⟩tanϕ
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