Author S.T. TU
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J.M. Gong and X. Ling Nanjing University of Chemical Technology
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Nanjing 210009
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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 specimen may be used for the high temperature strength assessment, but can hardly be used for life assessment of the practical welded components, which depends on the loading conditions of the components.
关键词:
high temperature
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null
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Author N. Wang
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B.S. Zhou
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Z.D. Wang and D.D. Wu College of Mechanical Engineering
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East China University of Science and Technology
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Shanghai 200237
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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 stress. Creepfatigue tests with notchedbar specimens were carried out at 550. The actual creepfatigue lives are in good agreement to the predicted lives according to inelastic strain energy damage model.
关键词:
damage mechanics
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null
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Author M. Miyahara1) and K. Tokimasa2) 1) Corporate Research & Development Laboratories
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Sumitomo Metal Industries
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Ltd.
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Amagasaki
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Japan2) Department of Mechanical Engineering
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School of BiologyOriented Science and Technology
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Kinki University
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Uchitacho
,
Wakayama
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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 automobile and in the fossil power plants. Based on the results of the inelastic analysis and the creepfatigue properties of the material, which were obtained by IJ(=PP,PC, CP, CC) tests, the effects of the material properties, operating conditions and configuration of components were quantitatively evaluated to select the most effective measures for the thermal fatigue life extension. The SRP has been successfully applied until now to the life prediction and extension of the actual structural components subjected to thermal cycling by the authors.
关键词:
creepfatigue
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null
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