作　　者： (郝敏娟）; (谢中朋）; (岳忠）;

机构地区： 首都经济贸易大学安全与环境工程学院,北京100070

出　　处： 《玻璃钢／复合材料》 2017年第8期25-29,共5页

摘　　要： 为探索玻璃纤维增强复合材料在四点弯曲载荷作用下分层演变行为及分层缺陷对复合材料承受负荷能力和服役期限的影响,经过设置相异位置的人为分层缺陷,在万能试验机上对试样实施四点弯曲试验,由声发射记录全过程,并通过试样的撞击累积-时间-幅度历程图、载荷-时间-相对能量历程图、声发射撞击信号定位图等判断复合材料分层损伤的破坏程度。结果表明,接近试件表面的分层缺陷加快了材料破坏扩展进程,分层缺陷所在的位置很大程度地改变了复合材料的弯曲性能,分层缺陷越靠近试件表面,对试件损害力度越大,试件服役能力越差。 In order to investigate the effects of stratified evolution and delamination on the load capacity and service life of the composite materials under the four-point bending load,the artificial tectonic defects of the different positions were set up.The four-point bending test was carried out,the whole process was recorded by acoustic emission,and the degree of damage for the composite material was judged by the collision accumulationtime-amplitude history diagram,load-time-relative energy history diagram,acoustic emission impact signal location diagram and so on.The results show that the stratification defects near the surface of the specimen accelerate the process of material failure and expansion.The location of the delamination defect changes the bending performance of the composites to a great extent.The closer the stratification defects are to the surface of the specimen,the greater the damage,the worse the service capacity of the specimen.

关 键 词： 复合材料 分层损伤 四点弯曲 声发射