铺层结构对复合材料层合板拉伸性能的影响

Effect of Layered Structure on Tensile Strength of Composite Laminates

设计并制备了6种不同铺层结构的层合板,通过对其进行拉伸试验,研究了不同铺层角度及不同铺层比例对层合板拉伸性能的影响。通过试验获得了6种复合材料层合板在拉伸试验中所能承受的极限拉伸强度,损伤特征以及载荷-位移曲线。结果表明:随着偏轴角增大,复合材料层合板拉伸强度逐渐降低,当45°和90°铺层体积分数相同时,45°铺层的层合板拉伸强度高于90°铺层的层合板;[0°/45°]铺层在表面可有效减小分层面积,由于内部剪切作用[0/90°]铺层更易出现分层。验证了复合材料层合板可通过改变铺层角度设计其力学性能。

The laminates of 6 different layers structure were designed and prepared,meanwhile the effects of the angle of different layer and different one-way zone volume mass fraction on the tensile properties of laminated plates were studied through the tensile test.The tensile ultimate strength,damage characteristics and load-displacement curves of 6 kinds of composite laminates under tensile test were obtained through experiments.The results show that the tensile strength of composite laminated plates decreases with the increase of eccentric axis angle.When the volume fraction of the 45°and 90°is the same,the tensile strength of the laminated plate in the 45°layer is higher than that of the laminated plate in the 90°layer.The delamination area can be effectively reduced on the surface of the[0°/45°]layer,and the layer is more prone to be layered because of the[0/90°]of internal shear.It is verified that the mechanical properties of composite laminated plates can be designed by changing the angle of lamination.