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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.21 No.5
- 발행연도
- 2007.5
- 수록면
- 699 - 707 (9page)
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초록· 키워드
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In this paper, the inelastic constitutive models for the simulations of the cyclic softening behavior of the modified 9Cr-1Mo steel, which has a significant cyclic softening characteristic especially in elevated temperature regions, are investigated in detail. To do this, the plastic modulus, which primarily governs the calculation scheme of the plasticity, is formulated for the inelastic constitutive models such as the Armstrong-Frederick model, Chaboche model, and Ohno-Wang model. By implementing the extracted plastic modulus and the consistency conditions into the computer program, the inelastic constitutive parameters are identified to present the best fit of the uniaxial cyclic test data by strain-controlled simulations. From the computer simulations by using the obtained constitutive parameters, it is found that the Armstrong-Frederick model is simple to use but it causes significant overestimated strain results when compared with the Chaboche and the Ohno-Wang models. And from the ratcheting simulation results, it is found that the cyclic softening behavior of the modified 9Cr-1Mo steel can invoke a ratcheting instability when the applied cyclic loads exceed a certain level of the ratchet loading condition.
목차
Abstract
1. Introduction
2. Inelastic constitutive models
3. Simulation of a cyclic behavior of modified 9Cr-1Mo steel
4. Conclusions
Acknowledgment
References
참고문헌 (14)
참고문헌 신청
Armstrong, P. J. and Frederick, C. O., 1966, “A Mathematical Representation of the Multiaxial Bauschinger Effect,” CEGB Report RD/B/N731, Berkeley Nuclear laboratories.
Bari, S. and Hassan, T., 2000, “Anatomy of Coupled Constitutive Models for Ratcheting Si-mulation,” Int. J. Plasticity, Vol. 16, pp. 381~409.
Chaboche, J. L. and Rousselier, G., 1983, “On the Plastic and Viscoplastic Constitutive Equations – Part I: Rules Developed with Internal Variable Concept,” Journal of Pressure Vessel Technology, Vol. 105, pp. 153~158.
Chaboche, J. L. and Rousselier, G.., 1983, “On the Plastic and Viscoplastic Constitutive Equations – Part II: Application of Internal Variable Concepts to the 316 Stainless Steel,” Journal of Pressure Vessel Technology, Vol. 105, pp. 159~164.
Chaboche, J. L., 1989, “Constitutive Equations for Cyclic Plasticity and Cyclic Viscoplasticity,” Int. J. Plasticity, Vol. 5 pp. 247~302.
Bari, S. and Hassan, T., 2000, “Anatomy of Coupled Constitutive Models for Ratcheting Si-mulation,” Int. J. Plasticity, Vol. 16, pp. 381~409.
Chaboche, J. L. and Rousselier, G., 1983, “On the Plastic and Viscoplastic Constitutive Equations – Part I: Rules Developed with Internal Variable Concept,” Journal of Pressure Vessel Technology, Vol. 105, pp. 153~158.
Chaboche, J. L. and Rousselier, G.., 1983, “On the Plastic and Viscoplastic Constitutive Equations – Part II: Application of Internal Variable Concepts to the 316 Stainless Steel,” Journal of Pressure Vessel Technology, Vol. 105, pp. 159~164.
Chaboche, J. L., 1989, “Constitutive Equations for Cyclic Plasticity and Cyclic Viscoplasticity,” Int. J. Plasticity, Vol. 5 pp. 247~302.
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