A semi-homogeneous numerical analysis method and system for interface failure analysis of porous materials

CN122157913APending Publication Date: 2026-06-05HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HOHAI UNIV
Filing Date
2026-05-08
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing finite element methods exhibit stress singularities when dealing with defective boundaries, and the Poisson's ratio limitation exists within the bond-based near-field dynamics framework, making it difficult to accurately describe the multidimensional deformation of complex structures and to precisely characterize interface defects in multiphase materials.

Method used

By identifying cross-interface interaction bonds through spatial distance and phase property determination, a random fracture mechanism is introduced to determine the proportion of cross-interface bonds. Combined with a conventional state-based near-field dynamics framework, the interface defects of multiphase materials are simulated, avoiding the explicit establishment of massive microporous meshes and achieving efficient simulation.

Benefits of technology

Breaking through the limitations of Poisson's ratio, this method accurately characterizes interface defects, efficiently simulates crack initiation and evolution in multiphase materials, reduces computational costs, and conforms to realistic mechanical responses.

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Abstract

The application belongs to the field of computational mechanics and engineering simulation, and discloses a semi-homogeneous numerical analysis method and system for interface damage analysis of porous material, which comprises the following steps: step one, a discretized material point numerical model containing different material phases and physical interfaces is established, material parameters are input, and the cross-interface interaction bonds connecting different material phases are identified through space distance and phase attribute determination; step two, based on the identified cross-interface interaction bonds, an interface defect characterization algorithm is introduced to randomly break a given proportion of the cross-interface interaction bonds to characterize the original interface defects; step three, based on the generated defect-containing cross-interface bond set and pure phase bond, the force state based on the defect-containing bond set and phase identification is solved; and step four, based on the bond type identification, dynamic integration and multi-phase microscopic elastic-brittle fracture evolution are carried out.
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