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检索条件:关键词= life prediction  

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316L不锈钢的高温疲劳蠕变行为和寿命预测

董杰陈学东范志超江慧丰姜恒陆守香

材料研究学报

进行316L不锈钢在单级和两级载荷作用下的高温疲劳蠕变试验, 研究了载荷历程效应对材料行为的影响. 在已有统一的疲劳蠕变损伤演化模型基础上, 得到了316L高温单级载荷作用下非线性损伤演化曲线. 同时, 建立了一种耦合载荷历程效应的多级疲劳蠕变载荷作用下的材料破坏准则. 基于该破坏准则, 结合材料的...

关键词: 材料科学基础科学 , life prediction , failure rule , fatigue creep , load history

粉末冶金构件疲劳裂纹的扩展寿命

陆波,王旭青,丁建雄,汪武祥

钢铁研究学报

针对航空发动机粉末冶金旋转盘件的疲劳裂纹扩展特性,以标准紧凑拉伸试样裂纹扩展数据为基础,基于Paris公式获得了材料典型温度下的裂纹扩展参数,并利用简单件对所采用的裂纹扩展计算方法进行了验证。进行了粉末冶金旋转构件的裂纹扩展试验,继而进行断口分析,通过测量疲劳条带获得了裂纹扩展寿命。同时,采用有限元...

关键词: 粉末冶金 , stress intensity factor , crack propagation , life prediction

THE MECHANICAL BEHAVIOR OF LABORATORY CROSS-WELD SPECIMEN AND ITS RELATION WITH THE PRACTICAL CASES AT ELEVATED TEMPERATURE

Author S.T. TU , J.M. Gong and X. Ling Nanjing University of Chemical Technology , Nanjing 210009 , ChinaManuscript received 18 October 1998

金属学报(英文版)

In order to interpret the test results of crossweld specimens for application in practical welded components, the present paper studies the high temperature behavior of laboratory cross weld specimens in terms of the uniaxial material tests and numerical simulations. It is found that the crossweld s...

关键词: high temperature , null , null , null , null

A DAMAGE MODEL OF LIFE PREDICTION UNDERCREEPFATIGUE INTERACTION

Author N. Wang , B.S. Zhou , Z.D. Wang and D.D. Wu College of Mechanical Engineering , East China University of Science and Technology , Shanghai 200237 , ChinaManuscript received 18 October 1998

金属学报(英文版)

Based on the fundamental definition of damage and inelastic strain energy hypothesis, this paper presents an inelastic strain energy damage model under creepfatigue interaction condition, with the damage constitutional equations and life prediction formulae respectively described by strain and stres...

关键词: damage mechanics , null , null , null

LIFE PREDICTION OF HIGH TEMPERATURE STRUCTURALCOMPONENT BY STRAIN RANGE PARTITIONING

Author M. Miyahara1) and K. Tokimasa2) 1) Corporate Research & Development Laboratories , Sumitomo Metal Industries , Ltd. , Amagasaki , Japan2) Department of Mechanical Engineering , School of BiologyOriented Science and Technology , Kinki University , Uchitacho , Wakayama , JapanManuscript received 18 October 1998

金属学报(英文版)

The authors recent works on the improvement of the Strain Range Partitioning(SRP) method and its application to the life prediction of high temperature structural components are summarized. Examined components are divided into three groups, that is, components in the steel production plants, in the...

关键词: creepfatigue , null , null , null