A method, system, and medium for simulating solid fracture fragmentation

By using a shared-node coupling method between finite element and discrete element methods, the problem of simulating the entire process from continuous deformation to discrete fracture is solved, achieving accurate simulation of brittle materials. This method is applicable to the simulation of damage and multi-crack propagation in materials such as rock and concrete.

CN120781594BActive Publication Date: 2026-06-23INST OF MECHANICS CHINESE ACAD OF SCI
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF MECHANICS CHINESE ACAD OF SCI
Filing Date
2025-06-05
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing technologies struggle to simulate the entire process from continuous deformation to discrete fracture in solid materials, and suffer from problems such as complex mesh generation and insufficient energy conservation interpretation.

Method used

A finite element and discrete element coupling method based on shared nodes is adopted to achieve seamless coupling between the finite element and discrete element methods through shared nodes. A macroscopic constitutive model and a contact key constitutive model are set respectively, and the contribution factor is dynamically adjusted to control the contribution of nodal forces. The motion is calculated by combining Newton's laws to realize the simulation of the whole process from continuous deformation to discrete fracture.

Benefits of technology

It improves simulation accuracy and can accurately describe the failure process of brittle materials under multi-stage stress, including compression, tension, shear and dynamic fracture behavior, ensuring the physical consistency between continuous media and discrete fracture behavior.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120781594B_ABST
    Figure CN120781594B_ABST
Patent Text Reader

Abstract

The application relates to a method, system and medium for simulating solid rupture and fragmentation. The method comprises the following steps: discretizing a research area, generating finite element units and discrete element particles based on shared nodes; setting constitutive models and material parameters of the finite element units and the discrete element particles respectively; setting boundary conditions of the finite element units, and the mass and boundary conditions of the discrete element particles are inherited from the finite element units; calculating deformation forces of the finite elements and contact forces of the discrete element particles; calculating contribution factors of the finite element units and the discrete element particles respectively; calculating contribution values of the finite elements and the discrete element particles to node forces of the shared nodes; calculating resultant forces of the shared nodes; calculating motions of the shared nodes according to Newton's law; updating strain matrices of the finite element units and contact topological relations of the discrete element particles respectively; and performing a loop until an exit condition is met. The application can effectively predict the whole-process mechanical response from continuous deformation to discrete fragmentation.
Need to check novelty before this filing date? Find Prior Art