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

A constitutive model, cumulative effect technology, applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., can solve the problem of unclear physical meaning, reduce the accuracy of analysis results, damage the constitutive model parameters are not given and other problems, to achieve the effect of expanding the scope of application, accurate results, and improving usability

Active Publication Date: 2018-11-30
TIANJIN UNIV
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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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  • Material constitutive model numerical analysis method taking damage accumulation effect into consideration
  • Material constitutive model numerical analysis method taking damage accumulation effect into consideration
  • Material constitutive model numerical analysis method taking damage accumulation effect into consideration

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Embodiment 1

[0109] In the following, an example is used to illustrate the superiority of the numerical analysis method of the material constitutive model considering the damage accumulation effect of the present invention in practical application.

[0110] The specific process of step A is: In this embodiment, the numerical analysis of the constitutive model of the cast steel material considering the damage accumulation effect is carried out, and the damage variable D index of the cast steel material is based on the maximum equivalent plastic strain and the equivalent plastic strain increment in the cycle process is the internal variable, and the undetermined parameter is the damage parameter β related to the material. The damage variable D index is shown in formula (1).

[0111] The specific process of step B is:

[0112] Step B1: According to the numerical analysis method of the material constitutive model considering the damage accumulation effect of the present invention, obtain the ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/13G06F2119/06G06F2111/10
Inventor 韩庆华冯飞达芦燕刘铭劼黄倩文
Owner TIANJIN UNIV
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