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A unified sharp-diffusive phase-field model for bulk and interfacial cohesive fracture
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DOI：10.1016/j.engfracmech.2026.112509.png)
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Abstract
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• Unified sharp-diffusive phase-field model for bulk and interface fracture. • Localized source term enables independent control of interface toughness. • Interfacial strong discontinuities are captured by a single element layer. • Unified parametric equations govern both bulk and interfacial cohesive laws. • Predicted multiphase fracture paths match experimental observations well.
Keywords:
Phase-field method
Interfacial failure
Sharp-diffusive Ω2-model
Multiphase materials
Cohesive fracture
Mixed-mode traction–separation law
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