【摘要】 采用真空辅助灌注成型工艺与热压罐成型工艺,分别制备不同增强材料的标准压缩试样和含缺陷的压缩试样。压缩测试实验结果表明,压缩载荷下波纹缺陷引起压缩弹性模量和强度显著减小,并且对压缩强度的影响更加明显;同时,均一波纹对复合材料板材的压缩强度与压缩弹性模量的影响比梯度波纹更大;此外,波纹对碳纤维预浸料增强复合材料的力学性能影响更大,层间剪切破坏是试样主要失效机制,并且在纤维波纹的最大偏转角处,试样易发生横向剪切破坏。更多还原

【Abstract】 We adopted VARI process and the autoclave molding process to manufacture compression samples with different reinforced fibers and compression samples with fiber waviness defect. The results of the compression tests showed that Young’s modulus and compressive strength degraded seriously with the increase of fiber waviness ratio,and fiber waviness had greater influence on compressive strength. Meanwhile,uniform waviness had a greater effect on compressive strength and Young’s modulus than graded waviness. Interlaminar shear stress was found to be the dominant failure mechanism. Moreover,the samples are prone to have transverse shear failure on the position of maximum misalignment angle.更多还原