A damage plasticity constitutive calculation method of concrete polymorphic material based on a double driving architecture

By employing a damage-plastic constitutive calculation method based on a dual-drive architecture, the compatibility problem of multiple types of concrete materials in finite element analysis was solved, achieving accurate simulation and stable calculation results for special materials, thus improving the accuracy and stability of finite element analysis.

CN122201569APending Publication Date: 2026-06-12SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Filing Date
2026-05-15
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing technologies are difficult to integrate with various special materials that are not ordinary concrete in finite element analysis, resulting in physical and logical conflicts in the parameter matrix. They cannot accurately simulate the stiffness degradation and hysteretic energy dissipation of materials under cyclic loading, and there is also a mesh sensitivity problem.

Method used

A damage plastic constitutive calculation method based on a dual-drive architecture is adopted. The dual-drive parameter cascade derivation engine is activated through the material matrix determination mechanism, the empirical formula binding is removed, customized fracture energy data is read, the crack zone theory is introduced to transform displacement-type damage, and the variable strain ratio coefficient is dynamically calculated to reconstruct the nonlinear unloading-reloading stiffness degradation trajectory.

Benefits of technology

It achieves accurate simulation of multi-state concrete materials, eliminates mesh dependence, improves the stability and convergence rate of finite element analysis, and enhances the accuracy of mechanical response prediction under cyclic loads such as earthquakes.

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Abstract

The application discloses a damage plastic constitutive calculation method of a concrete polymorphic material based on a double driving architecture. The calculation method comprises the following steps: obtaining material physical basic information and a characteristic length of a finite element grid; activating a double driving parameter cascade deduction engine based on a material matrix determination mechanism; introducing a crack band theory to perform displacement type damage conversion, converting cracking strain into crack opening displacement based on the characteristic length, and adaptively correcting an exponential softening coefficient; performing parallel calculation of tension and compression to obtain a tensile damage variable and a compressive damage variable; reconstructing a nonlinear unloading-reloading stiffness degradation trajectory, deducing a tensile-compressive asymmetric residual plastic strain, and dynamically giving a loading-unloading pinch coefficient; and data cleaning, cutting and numerical interface formatting output. The method breaks the limitation of traditional empirical formula, enables a single system to be downward compatible with low-strength extremely brittle materials, and expands the material application range of nonlinear finite element simulation.
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