论文部分内容阅读
针对Z-pin增强复合材料层合板的拉伸性能进行了试验研究及模拟分析。拉伸试验研究了3种铺层方式的层合板:[0]6;[90]12;[45/0/-45/90]2S。模拟分析将根据引入Z-pin造成的复合材料层合板微观结构变化建立单胞模型来进行,通过调整单元材料坐标系的1方向来模拟Z-pin周边纤维偏转。通过试验研究和模拟分析得出了Z-pin对3种层合板拉伸强度的影响程度。研究表明Z-pin引入造成的面内纤维含量降低(由树脂富裕区引起)和纤维方向偏转(包括纤维面内偏转和厚度方向卷曲)是层合板拉伸性能降低的主要原因。通过模拟分析进一步得出:对于[0]6铺层层合板,Z-pin插入引起的纤维面内偏转是面内拉伸强度降低的主要因素;对于准各向同性层合板,Z-pin插入产生的树脂富裕区(降低了纤维含量)是面内拉伸强度降低的主要因素。
Tensile properties of Z-pin reinforced composite laminates were studied and simulated. Tensile tests were conducted on three laminate plies: [0] 6; [90] 12; [45/0 / -45 / 90] 2S. The simulation analysis will be based on the introduction of Z-pin composite microstructure changes of composite laminates to establish a single cell model, by adjusting the direction of the unit material coordinate 1 direction to simulate Z-pin peripheral fiber deflection. The influence of Z-pin on the tensile strength of the three kinds of laminates was obtained through experimental study and simulation analysis. Studies have shown that the decrease of the in-plane fiber content (caused by the resin rich area) and the deflection of the fiber direction (including the fiber surface deflection and the thickness direction curl) caused by the introduction of the Z-pin are the main reasons for the decrease of the tensile property of the laminate. It is further obtained through simulation analysis that for [0] 6 laminated laminates, the in-plane deflections caused by Z-pin insertion are the main factors for the decrease of in-plane tensile strength; for quasi-isotropic laminates, Z-pin insertion The resulting resin-rich zone (reduced fiber content) is a major factor in the reduction of in-plane tensile strength.