A Universal Method for Acquiring the Constitutive Behaviors of API -5 L X90 Welds
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- 作者：L. Kong ; J. Shuai ; X. Zhou ; Y. Chao ; K. Han
- 关键词：Uniform elongation ; Constitutive behavior ; Considère criterion ; Ramberg ; Osgood model ; Welds
- 刊名：Experimental Mechanics
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：56
- 期：2
- 页码：165-176
- 全文大小：1,427 KB
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J. Shuai (1)
X. Zhou (2)
Y. Chao (3)
K. Han (1) (4)
1. College of Mechanical and Transportation Engineering, China University of Petroleum-Bejing, Beijing, 102249, China
2. Department of Oil and Natural Gas Engineering, Southwest Petroleum University, Chengdu, 610500, China
3. Department of Mechanical Engineering, University of South Carolina, Columbia, 29208, USA
4. China HuanQiu Contracting & Engineering Corp, Beijing, 100012, China - 刊物类别：Engineering
- 刊物主题：Mechanical Engineering
Theoretical and Applied Mechanics
Characterization and Evaluation Materials
Structural Mechanics
Engineering Fluid Dynamics
Engineering Design - 出版者：Springer Boston
- ISSN：1741-2765
文摘
The uniform elongation, which is the key factor to the constitutive behavior, is generally calculated by the Considère criterion, i.e., the uniform elongation equates the work-hardening exponent. However, it is found in this study that the widely used Considère criterion is not applicable to metals when the materials are subjected to the maximum load, as the first derivative of the fitted constitutive behavior is not zero which is the basic assumption in Considère criterion. To acquire the whole constitutive behaviors, an accurate and universal method is proposed, based on the work-hardening exponent and yield strength, to calculate the uniform elongation beforehand. With the yield strength obtained via the DIC data, and the work-hardening exponent determined by fitted Ramberg-Osgood model, the uniform elongation can be calculated by the new proposed method. The accuracy of the new method is validated by the conventional load method, indicating that the proposed method is applicable and feasible. With the uniform elongation calculated by the proposed method, the whole constitutive behavior of API 5 L X90 welds can be easily obtained. Keywords Uniform elongation Constitutive behavior Considère criterion Ramberg-Osgood model Welds