Maximum strain failure analysis (3D)

Failure Index

This software provides all six failure index values, F, for solid laminate plies that have a specified maximum strain criterion. The following table lists the equations used to compute these values.

Failure index value	Maximum strain criterion
F1	ε1/XTε if ε1>0ε1/XCε if ε1<0
F2	ε2/YTε if ε2>0ε2/YCε if ε2<0
F3	ε3/ZTε if ε3>0ε3/ZCε if ε3<0
F4
F5
F6

For variable definitions see Laminate failure analysis nomenclature.

Margin of Safety

All six margins of safety, MS, are computed as follows:

where FS is the specified factor of safety.

Strength Ratio

All six strength ratio, SR, are given by:

Look up more details

Laminate failure analysis nomenclature

Hill failure analysis (2D)

Hill failure analysis (3D)

Hoffman failure analysis (2D)

Hoffman failure analysis (3D)

Tsai-Wu failure analysis (2D)

Tsai-Wu failure analysis (3D)

Maximum stress failure analysis (2D)

Maximum stress failure analysis (3D)

Maximum strain failure analysis (2D)

LaRC02 failure analysis (2D)

Puck failure analysis (2D)

Von Mises yield and Von Mises ultimate failure analyses (2D and 3D)

Maximum transverse shear stress

Core ply material failure analysis

Interlaminar failure analysis (2D and 3D)

Laminate failure analysis references

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Maximum strain failure analysis (3D), Simcenter 3D 2021.1 Series

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