摘要
环氧树脂复合材料被广泛应用于电工装备核心构件制造,但成型过程增强材料和树脂基体的热学、力学参数不匹配会导致内部存在较大残余应力,对构件机械性能和使用寿命产生直接影响,因此准确有效的残余应力检测表征手段对于优化构件成型工艺和提高电工装备可靠性具有重要意义。本文首先介绍了增强型环氧树脂复合材料残余应力的形成机理,综述了基于曲率测量法、去层法、柔度法、钻孔法、光弹性法、X射线衍射法、拉曼光谱法、光纤法和声弹性法几种残余应力检测方法的原理及其适用范围,讨论了残余应力影响环氧树脂构件机械性能的研究进展,最后对环氧树脂复合材料残余应力检测方法进行了展望。本文相关总结有助于掌握构件残余应力分布规律并为成型工艺优化提供参考。
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.
作者
荣亚鹏
陈允
王亚祥
李天辉
陈荣
李进
RONG Yapeng;CHEN Yun;WANG Yaxiang;LI Tianhui;CHEN Rong;LI Jin(School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China;China Electric Power Research Institute,Beijing 100192,China;Pinggao Group Co.,Ltd.,Pingdingshan 467000,China;State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,China;State Grid Tianjin Electric Power Research Institute,Tianjin 300384,China)
出处
《复合材料科学与工程》
CAS
北大核心
2024年第8期110-118,共9页
Composites Science and Engineering
基金
国家自然科学基金(51807136)。
关键词
电工装备
环氧树脂复合材料
残余应力
检测技术
应力分析
electrotechnical equipment
epoxy composite
residual stresses
detection techniques
stress analysis
