扩展有限元法在断裂力学相场模型中的应用

doi:10.7527/S1000-6893.2021.25976

Abstract

Abstract: Both phase-field and Extended Finite-Element Methods (X-FEM) are important means of simulating crack propagation. In this work, we propose combining these two approaches to utilize their individual benefits based on a novel medial-axis algorithm. Consequently, we can still capture complex crack geometries while having crack surfaces explicitly modeled by modifying the mesh with the X-FEM. The key idea of the medial-axis algorithm is to construct auxiliary mesh, connect the intersection points of the auxiliary mesh and phase-field isocontour and eventually generate medial axes which are composed of piecewise line segments. A numerical example shows the consistency of load-displacement curves before and after medial-axis based mesh cutting, which validates the feasibility of combing X-FEM and phase-field approaches.

Key words: X-FEM, phase-field model, medial axis, crack propagation, fracture mechanics

CLC Number:

V222

ZHANG Ziyu, HAO Lin. Application of X-FEM in a phase-field model for crack propagation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 225976-225976.

References

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Application of X-FEM in a phase-field model for crack propagation

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