层合板预紧螺栓搭接孔边应力分析  

Hole-Edge Stress Analysis of Composite Laminate Lapped with Preloaded Bolt

作　　者：张永杰[1] 孙秦[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《应用力学学报》2009年第2期389-392,共4页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(10477018);西北工业大学科技创新基金(W016143)

摘　　要：针对复合材料层合板预紧螺栓单板搭接和双板搭接结构,分别建立了全尺寸三维有限元模型,应用非线性接触算法模拟螺栓连接,采用Prets179预紧力单元施加螺栓预紧力。通过分析两种搭接形式在不同预紧力下的孔边应力分布,得到了预紧力与孔边拉应力以及预紧力与孔边层间应力的关系曲线。分析表明:随着螺栓预紧力增加,层合板孔边拉应力水平不断降低;双板搭接的孔边应力明显低于单板搭接的孔边应力。For composite laminate lapped with preloaded bolt,3D full-size single-plate lapped model and double-plate lapped model are established.Nonlinear contact arithmetic is applied in finite element model,and prets179 preload element is employed for simulating bolt preload.With varying bolt preload,the hole-edge stress of two lapped models,and the relationships of preload with hole-edge tension stress and hole-edge interlaminar shear stress,are obtained.It is shown that the 3D contact finite element model is reliable and applicable to simulate composite laminate lapped with preloaded bolt.

关 键 词：复合材料层合板 接触算法 搭接 预紧螺栓 

分 类 号：TB330[一般工业技术—材料科学与工程]