Interlaminar failure analysis (2D and 3D)

Failure Index

Depending on the interlaminar failure theory you specify and on the way you define the allowables, different equations are used to compute the failure index, F.

Transverse shear with laminate allowable

Sb is the shear stress allowable for bonding that you define for the whole laminate.

Transverse shear with material allowable for isotropic materials

For 2D laminates: For 3D laminates:

Transverse shear with material allowable for orthotropic materials

For 2D laminates: For 3D laminates:

Normal stress with laminate allowable

Sn is the normal stress allowable for bonding that you define for the whole laminate. Normal stress interlaminar failure theory is only available for 3D laminates.

Normal stress with material allowable

The normal stress interlaminar failure theory is available only for 3D laminates.

The material property of the bottom ply applies for the bonding between two plies.

Margin of Safety

Margins of safety, MS, are computed as follows:

Strength Ratio

The strength ratio, SR, is:

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)

Maximum strain failure analysis (3D)

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

Laminate failure analysis references

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Interlaminar failure analysis (2D and 3D), Simcenter 3D 2021.1 Series

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