Transactions of Nanjing University of Aeronautics & Astronautics
Dynamic Phase Field Description on Ductile Fracture Process
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Abstract:
In comparison to discrete descriptions of fracture process， the recently proposed phase field methodology averts the numerical tracking strategy of discontinuities in solids， which enables the numerical implement simplification. An implicit finite element formulation based on the diffuse phase field is extended for stable and efficient analysis of complex dynamic fracture process in ductile solids. This exhibited formulation is shown to capture entire range of the characteristics of ductile material presenting J2-plasticity， embracing plasticization， cracks initiation， propagation， branching and merging while fulfilling the basic principle of thermodynamics. Herein， we implement a staggered time integration scheme of the dynamic elasto-plastic phase field method into the commercial finite element code. The numerical performance of the present advanced phase field model has been examined through several classic dynamic fracture benchmarks， and in all cases simulation results are in good agreement with the associated experimental data and other numerical results in previous literature.
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This work was supported by the National Natural Science Foundation of China （No. 12302176）.
Clc Number:
O341
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