Material constitutive model numerical analysis method taking damage accumulation effect into consideration

Abstract

The invention discloses a material constitutive model numerical analysis method taking damage accumulation effect into consideration. The method includes: step A, defining damage variable D; step B, acquiring material monotonic loading mechanical performance according to a stress-strain curve of a material; step C, calculating damage parameters beta, zeta 1 and zeta 2 according to a hysteretic curve of a material different in strain amplitude; step D, acquiring undetermined parameters m0, m1, m2 and m3 according to the hysteretic curve of the material, and building a material circulation constitutive model taking damage accumulation effect into consideration; step E, through ABAQUS finite element software, substituting related parameters of the material into a material user subprogram VUMAT to accurately simulate damage of the material under circulation load action. By the method, difficulty of accumulation damage model application at the present stage can be solved effectively, damageparameters can be specified, calculation accuracy can be improved, application of the material constitutive model taking damage accumulation effect in the finite element software is realized, and damage to the material under the circulation load action can be simulated accurately.

Description

technical field [0001] The invention relates to civil engineering, in particular to a numerical analysis method of a material constitutive model considering damage accumulation effect. Background technique [0002] Most of my country's high-rise buildings and large-span spatial structures are built in earthquake zones, facing serious earthquake disaster threats. Steel structures are widely used in industrial and civil buildings, especially in high-rise building structures and long-span space structures. Therefore, how to accurately simulate the damage of steel structures under earthquakes is of great significance. At present, the structural damage analysis of steel structures under the action of seismic cyclic loading usually does not consider the influence of material damage accumulation effect, which reduces the accuracy of the analysis results to a certain extent, and the existing damage models are usually based on the macro scale, which has no physical meaning. It is cl...

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Problems solved by technology

At present, the structural damage analysis of steel structures under the action of seismic cyclic loading usually does not consider the influence of material damage accumulation effect, which reduces the accuracy of the analysis results to a certain extent, and the existing damage models are usually based on the macro scale, which has no physical meaning. It is clear and inconsistent with the actual situation of material damage accumulation effect; in addition, the existing general finite element program does not provide a material constitutive model considering the damage accumulation effect, or the specific parameters of the provided damage constitutive model are not given, making the damage accumulation effect It is difficult to realize the numerical simulation analysis of

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