论文部分内容阅读
建立钛基复合材料叶环三维循环对称有限元模型,分析其应力分布和超转失效。重点研究纤维体积分数、增强面积、热残余应力及2种不同温度对叶环应力分布的影响。通过分析在一系列转速下叶环的环向应力得到其极限转速。结果表明:在2种不同温度下,纤维体积分数和增强面积对叶环应力的分布和大小影响不同。研究结果为叶环的结构设计提供了一定的建议。当考虑热残余应力时,在较高的温度下,较大的增强面积对叶环的设计是有利的。
A three-dimensional circular symmetrical finite element model of the leaf ring of titanium-based composite was established and its stress distribution and over-rotation failure were analyzed. Focus on the fiber volume fraction, enhanced area, thermal residual stress and two different temperature on the leaf ring stress distribution. The ultimate speed is obtained by analyzing the hoop stress of the ring at a series of speeds. The results showed that under the two different temperatures, the influence of fiber volume fraction and area on the distribution and size of leaf ring stress were different. The results provide some suggestions for the structural design of the leaf ring. When considering thermal residual stresses, the larger area of reinforcement is beneficial for the design of the leaf ring at higher temperatures.