Numerical simulation of fatigue failure of composite materials under compression

Mark Petrov,V Fomin,L Placidi

doi:10.1051/epjconf/201922101040

Abstract

The process of fatigue fracture of carbon fibres reinforced plastic under compressive loads is considered from the standpoint of the theory of reaction rates. Numerical simulation is based on rheological structural models of the material, which reproduce thermodynamic processes of local plastic deformation and failure occurring in time. The prediction of longevity of composite materials under compressive loads is similar to the solution of the problem for metal alloys under tensile loads when temperature and stresses are arbitrary functions of time.

Highlights

Fracture under variable loads, called fatigue, and the solution of the problem of assessing the longevity of materials under these conditions is a special case in the general problem of strength
The composite material (CM) can be considered as a heterogeneous medium, which has same properties as any other material, but at the same time it is necessary to take into account peculiarities of its behaviour as a structure
Kauzmann was the first to apply the theory of reaction rates to the flow of solids [3]

Summary

Introduction

Fracture under variable loads, called fatigue, and the solution of the problem of assessing the longevity of materials under these conditions is a special case in the general problem of strength. The final fracture of both specimens occurred from compression at almost same stress values, and residual strains at the same time had opposite signs.

Results

Conclusion