基于孔洞长大理论的多轴蠕变设计模型及其工程应用

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基金项目:

国家自然科学基金(E05010404,50225517)

Multi-Axial Creep Design Models Based on the Cavity Growth Theory and Its Applications in Engineering

School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

摘要: 多轴蠕变是高温构件失效的重要原因,工程设计中必须予以考虑。本文介绍了以孔洞长大理论为基础的多轴蠕变设计方法;探讨了孔洞长大的基本原理;讨论了基于该理论的5个常用模型;分析了这些模型在R5、ASME III、RCC-MR及VGB-R 509L中的应用,指出了高温构件多轴蠕变设计的困难,并对进一步的工作提出了建议。
- 蠕变设计 /
- 多轴状态 /
- 孔洞长大理论 /
- 工程应用
Abstract: Multi-axial creep is one of the major reasons for the failures of high temperature components,and it is an important factor to be considered in the engineering design.In this paper,the multi-axial creep design approach based on cavity growth mechanisms is generalized.The basic theory for cavity growth is in-multi-axial creep design of elevated temperature components are pointed out and advices for its further re-search are presented.troduced.Five typical multi-axial creep design models based on cavity growth theory are discussed.Applica-tions of these models in R5,RCC-MR,ASME III and VGB-R 509L are analyzed.Difficulties faced in the
- Creep design /
- Multi-axial stress states /
- Void growth theory /
- Applications