Dynamic progressive failure analysis method for composite material multi-scale model

Abstract

The mechanical response and progressive damage behaviors of the composite material laminated plate structure generated under the dynamic working condition are studied. Firstly, different mechanical behaviors of fibers and a matrix in a microscopic state are considered, and a three-dimensional multi-scale dynamic progressive damage evolution law model based on a microscopic failure theory is provided. Based on micro-component degradation elastic parameters in a typical representative volume unit model, a novel fiber and resin matrix damage evolution rule model and a failure unit auxiliary deletion criterion are provided; and secondly, a relationship model of macroscopic stress and representative volume unit microcosmic stress in the composite material model is built by adopting a stress amplification coefficient, and thus simulating in-layer and interlayer damage behaviors of the composite material under the cutting action of the dagger drill in combination with a bilinear cohesive force unit model.

Description

Technical field [0001] The invention relates to the field of mechanical response and progressive damage generated under dynamic load conditions of a composite material laminated plate structure. Background technique [0002] In order to reduce damage to composite structures under dynamic loading conditions, traditional and simple and direct research methods rely on experimental analysis, but traditional methods still have a lot of shortcomings, such as long preparation time, large material consumption, The cost is higher, and more importantly, it is impossible to observe and understand the mechanism of mechanical processing deformation and material failure from the microscopic view. Summary of the invention [0003] The present invention provides a three-dimensional multi-scale dynamic progressive damage evolution model based on micro-failure criteria. The relationship between macro-stress and micro-stress is established by using the stress amplification factor, and the structural...

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Problems solved by technology

[0002] In order to reduce the damage to the composite material structure under dynamic load conditions, the traditional and simple and direct research method relies on experimental analysis, but the traditional method still has a lot of shortcomings, such as long preparation time, large material consumption, The cost is high, and more importantly, it is impossible to observe and understand the mechanisms of mechanical deformation and material failure from a microscopic perspective

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