A 2D Adaptive Finite Element-Discrete Element Coupling Algorithm for Impact Dynamics

Articles in Press

Document Type : Research Paper

Authors
Zhibin Li
Xu Cheng
Banghai Jiang
College of Science, National University of Defense Technology, Changsha, Hunan 410073, PR China
10.22055/jacm.2026.49257.5844
Abstract
Meshfree methods offer excellent adaptivity, versatility, and robustness, and show great potential for solving problems intractable to conventional numerical methods. In the present study, an adaptive two-dimensional finite element (FE)-discrete element (DE) coupling algorithm is developed by incorporating the discrete element method (DEM) into continuum analysis and synergistically combining the finite element method (FEM) with DEM. By employing the Mohr-Coulomb fracture criterion, the adaptive transition from continuum to discontinuum is realized within the proposed FE-DE framework. The accuracy and effectiveness of the present method are validated through numerical simulations of the dynamic response of a two-dimensional plate under impulsive loading. Furthermore, the applicability and performance of the adaptive FE-DE algorithm are further examined via simulations of dynamic fracture in notched semi-circular rock specimens and penetration of concrete targets by rigid projectiles. Numerical results demonstrate that the proposed method is feasible and competent for simulating impact-induced failure and dynamic fracture processes.
Keywords
FE-DE Coupling
FEM
DEM
Adaptive Transition
Dynamic Failure
Subjects

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Available Online from 28 May 2026