Approximate model technology based composite foamed plastic interface phase mechanical test method

Abstract

The invention discloses an approximate model technology and calculation mesomechanics based composite foamed plastic interface phase mechanical parameter test method in the composite material field. The direct experiment measurement of the interface phase is avoided against the difficult experiment measurement of the interface properties of a composite foamed plastic which is a composite material filled by hollow spherical particles and the accurate and reliable interface parameter support lack of an interface phase mechanical model in the researches on the macromechanical performances of the composite foamed plastic, and the elastic stiffness constant and the thickness of the interface phase of the composite foamed plastic are identified by utilizing the approximate model technology through the combination of the macromechanical experiments and microscopic finite element simulation. The method disclosed in the invention overcomes an obstacle that the interface performances of materials of the above type cannot be directly obtained, provides accurate and reliable mechanical parameters for the interface phase modeling, and lays a foundation for the accurate prediction of the macromechanical performances of the materials of the type.

Description

technical field [0001] The invention relates to a method for testing mechanical parameters in the field of composite materials, in particular to a method for testing the interface phase mechanics of composite foam plastics based on approximate model technology. Background technique [0002] During the production and preparation of composite materials, due to complex thermal effects, chemical effects, and crystallization effects, an interface will be formed between the matrix and the reinforcing phase, also known as interface phase or interface layer. The interface phase is obviously different from the component materials (matrix, reinforcement phase) both in chemical composition and in mechanical properties. With the rapid development of composite mechanics, it is increasingly recognized that the performance of composite materials is not only closely related to the matrix and reinforcement phase, but also the interface plays a crucial role. The mechanical properties of comp...

AI Technical Summary

Problems solved by technology

Therefore, in the study of predicting the macroscopic mechanical properties of syntactic foams, the mechanical model of the interface phase lacks accurate and reliable interface parameter support, which eventually leads to a large deviation between the predicted results and the actual values.

Images