长管拖车复合材料气瓶内胆点蚀处剩余壁厚的研究  

Research on remaining wall-thickness at pitting of the liners of hoop-wrapped composite cylinders for tube trailers

作　　者：王静娴[1] 邓贵德[2] 段滋华[1] 梁海峰[1] 

机构地区：[1]太原理工大学化学化工学院,山西太原030024 [2]中国特种设备检测研究院,北京100013

出　　处：《大连工业大学学报》2015年第3期191-195,共5页Journal of Dalian Polytechnic University

基　　金：国家公益性行业(质检)科研专项项目(201210020)

摘　　要：采用有限元软件ANSYS对气瓶内壁存在不同尺寸凹坑缺陷的环缠绕复合材料气瓶及全金属气瓶在各载荷步下进行了计算,其中应用了单元生死技术来控制凹坑出现的时间。基于Goodman平均应力修正方程,计算复合气瓶有点蚀凹坑相对于无点蚀凹坑的等效交变应力幅增量,并与钢制气瓶有点蚀凹坑相对于无点蚀凹坑的等效交变应力幅增量进行比较。计算结果表明,点蚀处剩余壁厚为75%的设计壁厚对于复合材料气瓶来说偏于保守,认为复合材料气瓶点腐蚀处剩余壁厚不得小于设计壁厚的50%较为合理。Finite element method was used to analyze the stress of hoop-wrapped composite cylinders or steel cylinders with pit defects of different sizes,in which the time of pit appearance was determined by element birth and death method.The incremental of the equivalent alternating stress amplitude in composite cylinder with pits against no pits was calculated based on Goodman stress correction equation,and compared with the increments of the seamless steel cylinder.Numeral results suggested that to set the remaining wall thickness as 75%of the design of wall thickness is more conservative for composite cylinders.The percentage can be reduced properly,and 50%is suitable.

关 键 词：长管拖车复合材料气瓶 点蚀 有限元分析 单元生死 

分 类 号：TQ053.2[化学工程]