多角度纤维缠绕复合材料圆筒张力设计

Tension design for composite cylinder with multi-angle layers

缠绕张力是纤维缠绕复合材料圆筒设计的一项重要研究内容,它对纤维缠绕复合材料圆筒的质量起着关键作用。基于三维各向异性弹性力学,提出了一种针对多层复合材料纤维增强树脂基圆筒的张力设计方法。模型中将张力诱导残余应力作为复合材料缠绕层初始应力,基于Tsai-Wu失效准则获得内压作用下给定铺层顺序的使得爆破压强最大的复合材料圆筒最佳张力制度。研究结果表明:对于单层螺旋缠绕,当缠绕角一定的情况下,随着张力的增加,圆筒爆破内压先增加后减小,不同缠绕角下对应的最佳张力值不同,随着缠绕角从0°~90°的增加,最佳张力值先减小后增加;对于多层螺旋缠绕,铺层模式确定的情况,随着缠绕张力的增加,爆破压强先增加后减小。因此,对于给定铺层模式,需要合理确定其缠绕张力,以保证最大限度地发挥纤维的承载能力。

Filament winding tension design is an important research field in the design of filament winding pipes and it plays an important role in the quality of filament winding products.A method was proposed for composite cylinder with multi-angle layers based on three dimensional anisotropic elasticity theory.In the model,the tension-induced residual stress was used as the initial stress of the composite winding layer.The model adopted the Tsai-Wu failure criterion to design the winding tension for maximum the burst pressure when the stacking sequence of composite cylinder was given.The results show that:for the single spiral winding,as the tension increases,the internal pressure of the cylinder blasting increases first and then decreases.When the winding angle is certain value.Different winding angles correspond to different optimal tensions.With the winding angle increasing from 0°to 90°,the optimal winding tension decrease then increase.For the multi-layers spiral winding,burst pressure of the composite cylinder increase then decrease with the increasing of winding tension when the stacking sequence is given.Therefore,for a certain composite cylinder,optimal tension should be find to maximize load carrying capacity.