填充物、胶膜和Z-pin对复合材料T型接头强度影响对比  

Effects of adhesive,filler and Z-pin on strength of composite T-joint

作　　者：孙文博 马玉娥[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《复合材料学报》2018年第1期110-116,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(11572250)

摘　　要：为提高复合材料T型接头结构的拉伸强度,对接头中胶膜属性、圆弧区填充物属性和Z-pin增强三种结构参数对T型接头强度的影响进行了研究。设计了两种不同胶膜属性、两种不同填充材料和有无Z-pin的同尺寸试验件,完成拉伸试验,测得极限位移和极限拉伸强度,并进行了对比分析,同时研究了不同T型接头的损伤演化过程。结果表明:J299胶膜复合材料T型接头的极限位移和极限载荷相比于J116B胶膜分别提高了57.8%和64.7%;ZXC195增强芯复合材料T型接头的极限位移和极限载荷相比于单向带材料分别提高了51.7%和30.3%;Z-pin钉对复合材料T型接头的极限位移和极限载荷分别提高了190.8%和31.9%。三种结构参数均只影响接头的极限载荷和极限位移的大小,接头的整体刚度没有改变。胶膜属性对接头极限载荷的提高影响最大,而Z-pin对接头的极限位移提高影响最大。In order to improve the strength of composite T-joint,effects of adhesive,filler and Z-pin on enhancing strength of composite T-joint were studied.Same size samples with two different adhesives,two different fillers and Z-pinned and Un-pinned composite T-joints were designed,Tensile tests were performed and then ultimate displacement and ultimate strength were obtained and compared.Damage evolution of T-joints was analyzed.It is shown that the ultimate displacement and strength of J299 adhesive composite T-joint are 57.8% and 64.7% higher than that of J116 Bjoint,and the ultimate displacement and strength of ZXC195 enhanced core composite T-joint are51.7% and 30.3% higher than that of unidirectional core joint,and Z-pin increases the ultimate displacement and strength of composite T-joint by 190.8% and 31.9%.These three structure parameters can only alter the ultimate strength and displacement of composite T-joint,but the structure stiffness keeps unchanged.Adhesive property has the largest effect on the ultimate strength,while Z-pin has the largest effect on the ultimate displacement.

关 键 词：复合材料T型接头 拉伸强度 胶膜 芯材 Z-PIN 

分 类 号：TB332[一般工业技术—材料科学与工程]