【摘要】 目的研究用纤维的不同铺层方式缠绕的CFRP圆管拉伸与压缩强度的特性.方法采用各向异性弹性力学的方法,结合复合材料层合理论,研究了纤维缠绕层合圆管的应力分析和变形分析方法,分析了由碳纤维复合材料(CFRP)构成的圆管的强度.并采用纤维缠绕成型工艺,设计了两种尺寸的CFRP圆管,铺层方式均为[(900/00)2]S,通过对CFRP圆管进行压缩和拉伸实验,着重研究CFRP圆管在这两种受力状态下直至破坏的应力-应变关系,极限强度以及材料宏观破坏模式.结果铺层方式为[(900/00)2]S的CFRP圆管抗拉极限强度和应变远大于其抗压极限强度和应变,但这两种状态下CFRP圆管的弹性模量大致相当,且破坏模式均为脆性破坏.结论理论分析结果与试验结果进行比较,验证了理论分析结果是可靠的.更多还原

【Abstract】 Firstly,the stress and strain analysis method of filament winding tube is investigated according to anisotropic elasticity theory and lamination theory of composite material.Secondly,the strength of carbon-fiber-reinforced epoxy tubes is obtained.Then,two types of CFRP tubes are designed using the filament winding forming technology.These tubes are wound by carbon fibers with a filament winding pattern of [(900 /00)2]S.The compression and tensile test are also carried out to investigate the stress-strain relation-ship,ultimate strength and macroscopic failure mode of the former CFRP tube.The results demonstrate that the former CFRP tube has a much larger ultimate tensile stress and strain than compressive stress and strain.However,the elastic modules of CFRP tubes under tension and compression are similar and the failure mode of these CFRP tubes is brittle under compression and tension.In addition,the comparison of theoretical analysis results and experimental results show that the theoretical analysis results are reliable.更多还原