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Meshfree simulations of thermo-mechanical ductile fracture. (English) Zbl 1162.74052
Summary: We use a meshfree method to simulate thermo-mechanical ductile fracture under finite deformation. A Galerkin meshfree formulation incorporating the Johnson-Cook damage model is implemented in numerical computations. We are interested in the simulation of thermo-mechanical effects on ductile fracture under large scale yielding. A rate-form adiabatic split is proposed in the constitutive update. Meshfree techniques, such as the visibility criterion, are used to modify the particle connectivity based on evolving crack surface morphology. The numerical results have shown that the proposed meshfree algorithm works well, the meshfree crack adaptivity and re-interpolation procedure is versatile in numerical simulations, and it enables us to predict thermo-mechanical effects on ductile fracture.

MSC:
74S30 Other numerical methods in solid mechanics (MSC2010)
74R20 Anelastic fracture and damage
74F05 Thermal effects in solid mechanics
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