论文部分内容阅读
为提高复合材料单搭接头的连接性能,制备了不同参数的Z-pin增强单搭接头,通过拉伸试验,研究了Z-pin体积分数、直径以及植入角度对单搭接头连接性能的影响规律,分析了Z-pin对单搭接头性能的增强机理。结果表明Z-pin能明显提高复合材料单搭接头的连接性能:植入角度为90°、Z-pin直径为0.5mm时,在0%~3.0%体积分数范围内,单搭接头强度随着Z-pin体积分数的增加呈线性增加,含3.0%Z-pin的接头剪切强度为16.76MPa,比无Z-pin的接头强度提高了33.2%;Z-pin体积分数为1.5%、植入角度为90°时,Z-pin直径变化对单搭接头强度影响不大;含Z-pin体积分数为1.5%、直径为0.5mm时,随着Z-pin植入角度(背离搭接末端)的增加,单搭接头强度先增加后下降,失效模式从Z-pin拔出失效转变为Z-pin剪断失效;在植入角度为40°时,剪切强度最大(21.04MPa),比无Z-pin的接头剪切强度提高了67.1%。Z-pin植入角度(倾向于搭接末端)对单搭接头强度无影响。
In order to improve the connection performance of composite single-lap joints, Z-pin reinforced single-lap joints with different parameters were prepared. Through the tensile test, the influence of Z-pin volume fraction, diameter and implantation angle on single lap joint connection performance Law, analyzed the Z-pin on the single lap joint performance enhancement mechanism. The results show that the Z-pin can obviously improve the connection performance of single-lapped composite joints: the single-lap joint strength increases with the implantation angle of 90 ° and the Z-pin diameter of 0.5mm within the range of 0% -3.0% The volume fraction of Z-pin increased linearly with the shear strength of the joint containing 3.0% Z-pin at 16.76 MPa, which was 33.2% higher than that without Z-pin and the volume fraction of Z-pin was 1.5% When the angle is 90 °, the change of the Z-pin diameter has little effect on the strength of the single-lap joint. With the Z-pin volume fraction of 1.5% and the diameter of 0.5 mm, with the Z-pin implantation angle (away from the lapped end) , The strength of the single-lap joint first increased and then decreased, and the failure mode changed from Z-pin pull-out failure to Z-pin shear failure. At the implantation angle of 40 °, the shear strength was the highest (21.04 MPa) -pin joint shear strength increased 67.1%. The Z-pin implant angle (which favors lapped ends) has no effect on the strength of single-lap joints.