面外波纹对复合材料层合板弹性性能的影响

基于经典层合板理论（CLT），提出一个多参数解析模型，定量研究了面外波纹缺陷对含波纹缺陷的复合材料层合板弹性模量、剪切模量和泊松比等弹性性能的影响。 结果表明:面外波纹对主弹性模量、Z向弹性模量、X - Z平面剪切模量和面内泊松比都产生了显著影响；对于碳纤维/环氧树脂材料体系算例，在特定波纹比和波纹区域范围内，面内泊松比出现了负值。该建模方法为研究波纹缺陷对复合材料层合板弹性性能影响提供了参考。 

Influence of out-of-plane waviness on elastic properties of composite laminates

Based on the classical lamination theory (CLT), a multi-parameter analytic model was developed to quantitatively investigate influence of out-of-plane waviness defect on the elastic properties (i.e. elastic modulus, shear modulus and Poisson's ratios) of composite laminates with waviness. The results show that out-of-plane waviness has strong effects on the major elastic modulus, Z-direction elastic modulus, shear modulus in X-Z plane, and in-plane Poisson's ratio. The negative in-plane Poisson's ratio occurs in a particular range of the waviness ratio and wavy region for the example of carbon fiber/epoxy resin material system. The present approach provides a useful reference to evaluate the effects of out-of-plane waviness on elastic properties of composite laminates.