A criterion for ductile fracture based on continuum modeling of energy release rates
Source abstract
Abstract
A continuum model of ductile fracture initiation is presented which is based on consideration of the work done on the system sufficient to cause release of the binding energy necessary for crack formation. The fracture criterion is posed for plastic materials with no pre-existing crack as a critical state reached when the energy release rate of the bulk system is balanced by the energy release rate associated with the fractured medium. Two fracture modes are considered which are commonly addressed in fracture mechanics: mode I crack opening perpendicular to the fracture plane and mode II shear rupture tangential to the fracture plane. A study of the use of the criterion for a plastic material with power law hardening is examined and compared with published experimental data and empirical criteria.
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Research context
OpenAlex topics: Metal Forming Simulation Techniques · High-Velocity Impact and Material Behavior · Metallurgy and Material Forming
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