Composite material and method for multiscale response analysis of structure thereof

Abstract

The invention discloses a composite material and a method for multiscale response analysis of the structure thereof. The method comprises the steps that a meso-analysis model of the composite material to be analyzed is established, and the meso-analysis model is converted into a model required by multiscale analysis; a macroscopic analysis model of the composite material to be analyzed is established; the macroscopic analysis model is analyzed, and the meso-analysis model is called; the macroscopic analysis model transmits first transmission information to the meso-analysis model; the meso-analysis model conducts corresponding operation according to the first transmission information; response analysis of the meso-analysis model is conducted; the meso-analysis model feeds second transmission information back to the macroscopic analysis model; the macroscopic analysis model provides a new strain vector and a Jacobian matrix according to the second transmission information; the steps are repeated till integral points in the whole model are analyzed and convergence is achieved, and then the next incremental step is executed till the whole analysis process is finished. By the adoption of the method, the accuracy of multiscale response analysis of the composite material can be improved greatly.

Description

technical field [0001] The invention relates to the technical field of mechanical response analysis of composite materials, in particular to a multi-scale response analysis method of composite materials and their structures. Background technique [0002] Composite materials are materials with new properties macroscopically composed of two or more materials with different properties through physical or chemical methods. From a structural point of view, composite materials have multi-scale characteristics and contain at least three scales, namely, the macroscale corresponding to the composite material, the mesoscale corresponding to the component materials, and the microscale corresponding to the characteristics of pores and microcracks. . For structures made of composite materials, on the above-mentioned scale, a structural scale higher than that of the material is also added. Due to the inherent multi-scale characteristics of composite materials / structures, their structura...

AI Technical Summary

Problems solved by technology

However, the main problem of the above method is that it ignores the microscopic characteristics of composite materials, lacks the understanding of the nature of damage and failure processes of composite materials, and needs to develop corresponding phenomenological theories for different materials, and the application range and accuracy of the method are limited.

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