二维编织碳纤维增强树脂复合材料一步法铺层展开

One-step spreading for 2D woven carbon fiber reinforced plastics

二维编织碳纤维增强树脂复合材料的铺层展开质量对铺覆过程和产品质量有直接且显著的影响。本文针对二维编织碳纤维增强树脂复合材料铺层展开问题进行了研究,建立复合材料材料、随体和全局坐标系,并基于连续介质理论根据坐标系间的转换关系构建了非正交各向异性本构模型;完成了二维编织碳纤维增强树脂复合材料力学性能试验,包括测量复合材料拉伸性能的单向拉伸试验和测量剪切性能的镜框剪切试验;开发了二维编织碳纤维增强树脂复合材料一步法铺层展开算法并基于FORTRAN语言编写了自主可控的一步法铺层展开求解器。计算了口盖零件展开构型,展开构型轮廓线与实验结果分布趋势相同且最大误差仅为5.0 mm,相对误差仅为1.9%;剪切角计算结果与实验分布趋势一致且最大误差仅为4°,验证了一步法铺层展开算法和求解器的有效性。

Draping for 2D woven carbon fiber reinforced plastics(CFRPs) influences the quality of final composite parts directly and significantly. The problems of laying reinforced carbon fibers in the manufacturing of 2D woven CFRPs were studied. A material coordinate system, a global coordinate system and a body coordinate system were built. A non-orthogonal constitutive model according to coordinate transformation relation was proposed based on continuum theory. Mechanical properties of 2D woven CFRPs were tested by uni-axial tensile tests for measuring the tensile properties and picture-frame tests for measuring the shear properties. A one-step plies spreading algorithm for 2D woven CFRPs was developed and an independent one-step plies spreading solver was developed. A cover part was spread. The result shows great consistency that the maximum error is only 5.0 mm which is a 1.9%margin of error. The carbon fiber shear angle distributions by calculation are consistent with experimental results and the maximum error is only 4°. The one-step spreading algorithm of 2D woven CFRPs was verified by calculations and experiments.