Derivation of Path Independent Coupled Mix Mode Cohesive Laws from Fracture Resistance Curves
Source abstract
Abstract
A generalised approach is presented to derive coupled mixed mode cohesive laws described with physical parameters such as peak traction, critical opening, fracture energy and cohesive shape. The approach is based on deriving mix mode fracture resistance curves from an effective mix mode cohesive law at different mode mixities. From the fracture resistance curves, the normal and shear stresses of the cohesive laws can be obtained by differentiation. Since, the mixed mode cohesive laws are obtained from a fracture resistance curve (potential function), path independence is automatically satisfied. The effective mix mode cohesive law can have different shape and cohesive law parameters at different mode mixities so that the approach can be applied to various material failure models.
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Research context
OpenAlex topics: Numerical methods in engineering · Fatigue and fracture mechanics · Rock Mechanics and Modeling
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References (26)
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