高强纤维复合材料典型胶接接头抗弹性能研究  

Research on ballistic performance of typical adhesive joints of high-strength fiber composites

作　　者：吴伟 李典[1] 侯海量[1] 李永清[1] 姜安邦 朱锡[1] WU Wei;LI Dian;HOU Hailiang;LI Yongqing;JIANG Anbang;ZHU Xi(Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, China)

机构地区：[1]海军工程大学舰船与海洋学院,武汉430033

出　　处：《兵器装备工程学报》2022年第6期147-154,共8页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金项目(51979277);“十三五”预研(41422010902,30203010202)。

摘　　要：胶接接头作为纤维增强复合材料的典型连接结构,在舰船抗弹防护工程中应用广泛,但胶接接头部位通常因纤维不连续引起抗弹性能减弱等问题。为了解决该类型接头的等效防护问题,以高强聚乙烯纤维增强复合材料胶接接头为研究对象,采用瞬态非线性有限元分析和高速破片冲击试验方法,研究了典型10 mm、15 mm厚高强聚乙烯层合板胶接接头的抗弹过程和失效机理,并对连接接头的抗弹性能进行等效防护设计。结果表明:典型平板胶接接头抗弹失效过程可分为3个阶段:局部分层、渐进拉伸破坏、整体剪切破坏;接头补强层的失效机理主要为剪切穿孔破坏、双向拉剪破坏以及拉伸破坏;通过背衬补强层的方式可实现高强聚乙烯层合板胶接接头抗弹性能的等效防护设计,其补强层厚度不得小于0.3倍层合板厚度,拼缝两侧补强宽度范围不得小于40倍弹径。As a typical connection structure of fiber-reinforced composite materials,adhesive joints were widely used in ship anti-ballistic protection projects.However,the discontinuity of the fibers at the adhesive joint always leads to the weakening of ballistic performance.In order to solve the equivalent protection problem of adhesive joint,high-strength polyethylene fiber reinforced composite material adhesive joints were taken as the research object.The ballistic process and failure mechanism of adhesive joint with the thickness of 10 mm and 15 mm were studied by using nonlinear finite element analysis and high-speed fragment impact test,and the structure of adhesive joint for ballistic equivalent protection was designed too.The results show that the ballistic failure process of typical flat glued joints can be divided into three stages:local delamination,progressive tensile failure,and overall shear failure;the failure mechanism of the joint reinforcement layer is mainly shear perforation failure,bidirectional tensile shear failure,and tensile failure;the equivalent protection design of the adhesive joint ballistic performance can be realized by backing reinforcement layer,and the thickness of the reinforcement layer is more than 0.3 times the thickness of the laminate,and the width of the reinforcement layer on both sides of the seam is more than 40 times the projectile diameter.

关 键 词：纤维增强复合材料 胶接接头 抗弹性能 破坏形貌 侵彻 

分 类 号：O347.3[理学—固体力学]