Detection technique progress of the residual stress in epoxy composites

doi:10.19936/j.cnki.2096-8000.20240828.015

Abstract

Abstract: Epoxy composites are widely used in the core components of electrical equipment. However, the mismatch between the thermal and mechanical parameters of the reinforcement material and the resin matrix during the molding process can lead to significant residual stress, which directly affects the components’ mechanical properties and service life. Therefore, accurate and effective residual stress detection and characterization methods are of great significance for optimizing the component molding process and improving the reliability of electrical equipment. This paper first introduces the formation mechanism of residual stress in reinforced epoxy resin composites, summarizes the principle and application scope of several residual stress detection methods based on the curvature measurement method, delamination method, flexibility method, drilling method, photo-elasticity method, X-ray scattering techniques method, Raman spectroscopy method, optical fiber method, and acoustic-elasticity method, and discusses the research progress of residual stress affecting the mechanical properties of epoxy resin components. Finally, the residual stress detection methods for epoxy resin composite materials were prospected. The relevant summary in this article helps grasp the distribution law of residual stress in components and provides a reference for optimizing molding processes.

Key words: electrotechnical equipment, epoxy composite, residual stresses, detection techniques, stress analysis

CLC Number:

TB332

RONG Yapeng, CHEN Yun, WANG Yaxiang, LI Tianhui, CHEN Rong, LI Jin. Detection technique progress of the residual stress in epoxy composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(8): 110-118.

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