半厚度Z-pin植入对层合板弯曲性能的影响研究  

Effect of Half Thickness Z-pin Implantation on Flexural Properties of Laminates

作　　者：严斌 陈汉元 周举 代悦 刘维伟[1] YAN Bin;CHEN Hanyuan;ZHOU Ju;DAI Yue;LIU Weiwei(Northwestern Polytechnical University,Xi’an 710072,China;AECC Guiyang Engine Design and Research Institute,Guiyang 550081,China;Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西北工业大学,西安710072 [2]中国航发贵阳发动机设计研究所,贵阳550081 [3]西安理工大学,西安710048

出　　处：《航空制造技术》2021年第22期97-101,共5页Aeronautical Manufacturing Technology

摘　　要：通过三点弯曲试验研究了Z-pin在半厚度植入条件下其材质、直径和加捻状态对Z-pin增强复合材料层合板弯曲性能的影响。结果表明,采用Z-pin半厚度植入工艺相比于未增强对照组试件,增强组试件的弯曲强度、弯曲模量及弯曲应变能都有所提升。Z-pin材质、直径和加捻状态对试件弯曲强度、模量和弯曲应变能的影响甚微,究其原因为增强组试件界面X、Y处潜在的分层缺陷扩展严重,分层损伤主导了弯曲过程中试件的破坏。但Z-pin直径对层合板的失效模式有着重要影响,表现为小直径Z-pin增强试件分层裂纹扩展较为严重,但萌生裂纹数量较少,试件损伤多表现为受单一裂纹控制;大直径Z-pin增强试件裂纹扩展相对一般,但萌生裂纹数量较多,试件多表现为多重裂纹的损伤。The effects of material,diameter and twisting state of Z-pin on the bending properties of Z-pin reinforced composite laminates were studied by three-point bending test.The results show that the flexural strength,flexural modulus and flexural strain energy of the reinforced laminates with Z-pin half thickness implantation process are significantly improved compared with the control group.The material,diameter and twisting state of Z-pin have little effect on the flexural strength,modulus and strain energy of the specimens.The reason is that the potential delamination defects at the interface X and Y of the reinforcement group expand seriously,and the delamination damage dominates the failure of the specimen in the bending process.However,the Z-pin diameter has an important influence on the failure mode of laminates.The results show that the delamination crack propagation of small diameter Z-pin reinforced specimens is serious,but the number of initiation cracks is small.The damage of specimens is mostly controlled by a single crack.The crack growth of large-diameter Z-pin reinforced specimens is relatively common,but the number of initiation cracks is more,and the specimens are mostly multi crack damaged.

关 键 词：复合材料 Z-PIN 弯曲性能 桥联作用 弯曲应变能 

分 类 号：TB33[一般工业技术—材料科学与工程]