Analyzing Plastic Limit Load of Elbow Pipe under Internal Pressure with Triple-shear Unified Yield Criterion
-
摘要: 在变壁厚椭圆截面弯管应力分析的基础上,运用三剪统一屈服准则,对承受内压作用的弯管进行了极限载荷分析,推导出考虑弯管截面壁厚变化和弯管椭圆度的变壁厚椭圆弯管的塑性极限压力统一解析解。弯管的极限载荷随着弯管壁厚和弯管椭圆度的不同而变化。Abstract: Based on the bending stress analysis of the elliptical cross section of an elbow pipe with wall thickness variation,we use the triple-shear yield criterion to derive the plastic limit load formula that considers the variation of the wall thickness of the elbow pipe under external pressure and the bending elliptical variation. The plastic limit load of the elbow pipe changes with the wall thickness and ovality of the elbow pipe.
-
Key words:
- calculations /
- elastoplasticity /
- load limits /
- pressure vessels
-
[1] 郭茶秀,王学生,王定标. 复杂载荷下无缺陷弯管的塑性极限载荷[J].压力容器,2002,(04):8-11. [2] Chair R. Factors influencing the strength differential of high strength steels[J].Metallurgical Transactions,1972,(02):365-371. [3] Drucker D C. Plastic theory,strength differential (SD) phenomenon and volume expansion in metals and plastics[J].Metallurgical Transactions,1973,(03):667-673. [4] 丁伯民,黄正林. 化工设备设计全书-化工容器[M].北京:化学工业出版社,2002. [5] 吴迎. 高压弯管应力计算[J].化工设计,2006,(04):25-26. [6] 蒋家羚,徐方成,林兴华. 弯管应力计算的一种组合模型[J].化工装备技术,1994,(06):6-9. [7] 胡小荣,俞茂宏. 双剪统一强度准则修正及土压计算[J].岩土工程学报,2005,(03):283-287. [8] 胡小荣,张文完. 三剪统一屈服准则在柱形孔扩张问题中的应用[J].南昌大学学报(工科版),2010,(03):260-264. [9] 段志祥,沈士明. 内压作用下弯管塑性极限分析与试验研究[J].压力容器,2004,(08):1-4.
点击查看大图
计量
- 文章访问数: 129
- HTML全文浏览量: 21
- PDF下载量: 4
- 被引次数: 0