선박 및 해양구조물용 극저온 재료의 온도 및 변형률 속도 의존 통합 구성방정식 개발
Development of Temperature and Strain-Rate Dependent Unified Constitutive Equation for Ships and Offshore Structures
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초록
The mechanical properties of the most widely used cryogenic materials, i.e. austenitic stainless steel (ASS), aluminum alloy and invar steel, strongly depend on temperatures and strain rates. These phenomena show very complicated non-linear behaviors and cannot be expressed by general constitutive equation. In this study, an unified constitutive equation was proposed to represent the effect of temperature and strain rate on the materials. The proposed constitutive equation has been based on Tomita/Iwamoto and Bodner/Partom model for the expression of 2nd hardening due to martensite phase transformation of ASS. To simulate ductile fracture, modified Bodner/Chan damage model was additionally applied to the model and the model validity was verified by comparison of experimental and simulation results.
Abstract
The mechanical properties of the most widely used cryogenic materials, i.e. austenitic stainless steel (ASS), aluminum alloy and invar steel, strongly depend on temperatures and strain rates. These phenomena show very complicated non-linear behaviors and cannot be expressed by general constitutive equation. In this study, an unified constitutive equation was proposed to represent the effect of temperature and strain rate on the materials. The proposed constitutive equation has been based on Tomita/Iwamoto and Bodner/Partom model for the expression of 2nd hardening due to martensite phase transformation of ASS. To simulate ductile fracture, modified Bodner/Chan damage model was additionally applied to the model and the model validity was verified by comparison of experimental and simulation results.
참고문헌 (15)
- Bodner, S. R, "Unified Plasticity for Engineering Applications", pp.2002, Kluwer Academic
- Bodner, S.R, "Modeling of Continuum Damage for Application in Elastic-viscoplastic Constitutive Equations", Engineering Fracture Mechanics, 25(5), pp.705~712 (1986)
- Durrenberger, L, "Constitutive modeling of metals based on the evolution of the strain hardening rate", Journal of Engineering Materials and Technology, 129(4), pp.550~558 (2007)
- Hayhurst, D. R, "Constitutive Equation for Creep Damage", Acta Metallurgica, 25, pp.1059~1070 (1977)
- 홍진한, "극저온용 스테인레스 강의 저온거동 특성", 대한조선학회 논문집, 45(5), pp.530~537 (2008), 대한조선학회
- 이경준, "극저온 재료 성능분석을 위한 온도의존 손상모델 개발", 대한조선학회 논문집, 45(5), pp.538~546 (2008), 대한조선학회
- Lee, K.J, "A new constitutive model of austenitic stainless steel for cryogenic applications", Computational Material Science, 46(4), pp.1152~1162 (2009)
- Moreno, V, "Prediction of material thermomechanical response with a unified viscoplastic constitutive model", International Journal of Plasticity, 2(3), pp.223~245 (1986)
- Olson, G.B, "Kinetics of strain-induced martensitic nucleation", Metallurgical and Materials Transactions A, 6(4), pp.791~795 (1975)
- Owen, D.R.J, "Finite Elements in Plasticity:Theory and Practice" (1980), Pineridge Press
- Park, W.S, "Strainrate Effects on the Mechanical Behavior of the AISI 300 Series of Austenitic Stainless Steel under Cryogenic Environments", Materials and Design, 31(8), pp.3630~3640 (2010)
- Senchenkov, I.K, "Determination of the parameters of the Bodner-Partom model for thermoviscoplastic deformation of materials", International Applied Mechanics, 32(2), pp.132~139 (1996)
- Toi, Y, "Thermal Elasto-Viscoplastic Damage Behavior of Structural Members in Hot-Dip Galvanization", International Journal of Damage Mechanics, 11, pp.171~185 (2002)
- Tomita, Y, "Computational prediction of deformation behavior of TRIP steels under cyclic loading", International Journal of Mechanical Science, 43(9), pp.2017~2034 (2001)
- Zener, C, "Effect of strain rate upon plastic flow of steel", Journal of Applied Physics, 15(1), pp.22~ (1944)