夹持力对填充孔复合材料层合板层间应力的影响分析  

IMPACT ANALYSIS OF BOLT-CLAMPING FORCE TO FILLED-HOLE LAMINATES INTERLAMINAR STRESS

作　　者：曹勇[1] 冯蕴雯[1] 薛小锋[1] 朱鲜飞[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《机械强度》2015年第5期904-909,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金(10577015);国家青年科学基金(51105315)资助~~

摘　　要：提出了采用螺栓填充孔形式研究复合材料层合板连接接头孔边层间应力分布规律,并建立了含零厚度界面胶层的三维有限元模型对受面内拉伸载荷的层合板孔边层间应力进行求解。结果表明:层间正应力沿孔分布主要受螺栓夹持力影响,相同夹持力下,不同界面层的层间正应力集中在同一范围内波动;层间剪切应力既受到螺栓夹持力影响又与界面层的类型有关系,如[-45/90]和[0/-45]界面层层间剪切应力整体取值大于其他界面层;螺栓夹持力引起的层间正应力主要为压应力,对层间强度有益,但同时产生的层间剪切应力不利于层间强度的提高,因此存在合适的螺栓夹持力使复合材料接头具有良好的孔边层间强度。Using composite laminates with a bolt-filled hole were proposed to study interlaminar stress distribution of laminates joints hole-edge, and a 3D finite element model with a zero-thickness cohesive element was established for solving hole- edge interlaminar stress of laminated plate in tension. The results show that interlaminar normal stress distribution along the hole mainly affected by the bolt-clamping force, under the same bolt-clamping force,interlaminar normal stress value ranges is close; The interlaminar shear stress impact both by the bolt-clamping force and interface ply parameters, such as interlaminar shear stress of [ -45/90 ] and [ 0/-45 ] interface is larger than others; Interlaminar normal stress caused by bolt-clamping force was mainly compressive stress, and it is beneficial for the interlaminar strength, but interlaminar shear stress generated in the same time is not help to improve the interlaminar strength, therefore, a reasonable clamping force can enhance the interlaminar strength for bolt composite joints.

关 键 词：复合材料层合板 层间应力 填充孔拉伸 螺栓夹持力 分层失效 黏聚力模型 

分 类 号：TB33[一般工业技术—材料科学与工程] O343.8[理学—固体力学]