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公开(公告)号：US20230325560A1
公开(公告)日：2023-10-12
申请号：US18024780
申请日：2022-06-22
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
IPC: G06F30/23
CPC classification number: G06F30/23 , G06F2119/02
Abstract: A peridynamics-based finite element method (PeriFEM) for an structural damage analysis, comprising the following steps: A1: generating finite elements of a structure, A2: generating peridynamic elements based on the finite elements; A3: calculating a global load vector; A4: calculating a global stiffness matrix; A5: formulating and solving a linear algebra equation about the global node displacement vector; A6: evaluating whether the result satisfies the convergence criteria; if so, go to step A7, if not, return to step A4; A7: increasing the external load successively and loop A3-A7 after that, until the external load exceeds the maximum external load; A8: plotting the results. The implementation of PeriFEM in software includes the following operations: B1: generating the peridynamic elements for inputting into the software; B2: programing the formulation of the element stiffness matrix in step A4 as a subroutine; and B3: setting a method for the updating the subroutine.
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公开(公告)号：US20220075911A1
公开(公告)日：2022-03-10
申请号：US17431433
申请日：2020-12-01
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Fei HAN , Yongwei WANG , Gilles LUBINEAU
Abstract: A method for predicting a structural failure by a strength-criterion-driven peridynamic model is provided. By building a peridynamic model driven by the strength-criterion of structural materials and then applying geometric and material parameters and working conditions of a structure, a life period from a deformation to a complete break of the structure is predicted. The method is of a high reliability, a wide application range, and a high calculation efficiency. The method simulates an initiation and a propagation of multiple cracks on complex structures under complex load conditions until the structure is destroyed.
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