摘要
利用声发射技术实时监测四点弯曲载荷作用下含纤维断裂玻璃纤维增强复合材料胶接修补后试件的损伤演化过程,结合声发射信号统计分析方法,研究贴补片尺寸对修复效果的影响。结果表明,弯曲载荷作用下,两类贴补修补试件破坏模式均以贴补界面开裂为主,随着胶接修补贴补面积的增加,试件失效载荷呈增大趋势。贴补修补片长度为90mm时,其破坏载荷约为未修补试件破坏载荷的2倍。修补试件损伤破坏过程与对应声发射特征表现出良好的相关性,声发射信号统计性描述方法能够有效用于评估胶接修补复合材料试件的微损伤演化行为。
Acoustic emission（ AE） testing technology was used to monitor the process of damage evolution of glass fiber reinforced composite specimens with fiber breakage after repaired under four-point bending tests in real time. According to the statistical analysis method of acoustic emission signal,the influences of patch size on the repair effects were investigated. The results show that the failure modes of two kinds of patch specimens are mainly the patch interfacial cracking under bend loading. As the bonding repair area increases,the failure load of specimens increases. Compared with the specimen without defect,double failure load of repaired specimen was obtained when the length of patch is 90 mm. The damage and failure process of adhesive bonded repair specimen shows a good correlation with the corresponding acoustic emission characteristics,and the method of statistical description of acoustic emission signals could be effectively used to evaluate the micro-damage evolution behavior of adhesive bonded composite specimens.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2016年第7期9-13,共5页
Fiber Reinforced Plastics/Composites
基金
国家自然科学基金资助项目(11502064)
河北大学大学生创业训练计划项目(2015171)
关键词
复合材料
贴补修补
有限元
声发射
统计分析
composite material
patch repair
finite element analysis
acoustic emission
statistic analysis
