Abstract
We present a meshfree approach to model dynamic fracture in thin structures. Material failure is modeled based on a stress-based criterion and viscoplastic is used to describe the material behavior in the bulk material. Material fracture is simply modeled by breaking bonds between neighboring particles. The method is applied to fracture of cylindrical thin structures under explosive loading. The loading is modelled by a pressure-time history. Comparisons between the computational results and experimental data illustrate the validity and robustness of the proposed method.
Highlights
Modeling dynamic fracture of thin-walled structures remains a challenging task in computational mechanics
We present a meshfree approach to model dynamic fracture in thin structures
Thermal effects are incorporated into the constitutive model as they are crucial in dynamic fracture simulations of thin structures as presented in this paper
Summary
Modeling dynamic fracture of thin-walled structures remains a challenging task in computational mechanics. Meshfree method commonly exploits Lagrangian formulation [35,36,37,38,39,40,41,42,43] for both fluid and structure but does not suffer drawbacks of Lagrangian based finite element methods They can handle large deformation and fracture in a natural manner [44,45,46,47,48,49,50,51]. The first meshfree thin shell method for fracture was proposed by Rabczuk et al [2] This method was developed for linear and nonlinear materials and applied to static and dynamic problems.
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