Laminated glass impact resistance prediction and structure optimization method

Abstract

The invention discloses a laminated glass impact resistance prediction and structure optimization method. The method comprises the following steps: acquiring structural parameters and material performance parameters of glass and an interlayer film, and external impact load parameters; taking the obtained parameters as the input of a pre-constructed impact resistance prediction model to obtain theoutput of the impact resistance prediction model, i.e., the impact resistance result of the laminated glass; discretizing the laminated glass solid model into a series of spatial material points basedon a near-field dynamics theory, and generating spatial coordinates of the material points; based on the space coordinates, constructing a constitutive relation considering glass brittleness characteristics and PVB viscosity characteristics in the laminated glass; determining the contact relationship between the impact object and the laminated glass and the contact relationship between the glassand the PVB film; and determining boundary conditions of the laminated glass solid model, and performing prediction calculation to obtain an impact resistance result of the laminated glass. The methodcan effectively predict and analyze the mechanical behavior and damage problem of the laminated glass under impact damage.

Description

technical field [0001] The present invention relates to a method for predicting the impact resistance performance of laminated glass and optimizing its structure, in particular to a method based on state-type peridynamics method for predicting and analyzing the whole process of laminated glass under dynamic impact from crack initiation to expansion to destruction. It belongs to the field of composite material engineering technology and the field of structural engineering of high-strength explosion-proof laminated glass materials. Background technique [0002] As a widely used composite material, laminated glass not only has the ability to prevent wind, rain, heat and sound, but also plays an important role in infrastructure and military fields. The viscous characteristics of PVB film in laminated glass can effectively absorb glass shards and reduce the harm caused by glass shards splashing when it is damaged by impact. Therefore, it is more and more widely used in engineerin...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of dynamic discontinuity mechanics in the traditional continuum mechanics method, which leads to deviation and inaccuracy in the prediction of the impact resistance of laminated glass, and to provide a method for prediction of the impact resistance of laminated glass and structural optimization , the technical scheme is as follows:

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