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Effective fracture toughness in phase-field models for mode-II interface fracture: A maximum energy envelope method
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DOI：10.1016/j.tafmec.2026.105666.png)
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Abstract
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• Model enables efficient pre-computation of mode-II effective fracture toughness. • Anisotropic split of analytical strain energy density to match numerical method. • New maximum energy envelope method derived for history function prediction. • Captures true peak strain energy density in asymmetric shear fields. • Effective fracture toughness model validated on various shear-loaded configurations.
Keywords:
Effective fracture toughness
Phase-field models
Mode-II interface fracture
Maximum energy envelope method
Strain energy density
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