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918 CLEVUDINE DEMONSTRATES POTENT ANTIVIRAL ACTIVITY IN THE NAIVE CHRONIC HEPATITIS B PATIENTS
Lee, June Sung,Park, E.T.,Kang, S.S.,Gu, E.S.,Kim, J.S.,Jang, D.S.,Lee, K.S.,Lee, Jae-Su,Park, N.H.,Bae, C.H.,Baik, S.K.,Yu, B.J.,Lee, S.H.,Lee, E.J.,Park, S.I.,Bae, M.,Shin, J.W.,Choi, J.H.,Gu, C.,Mo Elsevier 2009 Journal of hepatology Vol.50 No.suppl1
How are seasonal prediction skills related to models’ performance on mean state and annual cycle?
Lee, June-Yi,Wang, Bin,Kang, I.-S.,Shukla, J.,Kumar, A.,Kug, J.-S.,Schemm, J. K. E.,Luo, J.-J.,Yamagata, T.,Fu, X.,Alves, O.,Stern, B.,Rosati, T.,Park, C.-K. Springer-Verlag 2010 Climate dynamics Vol. No.
Temperature Dependent Constitutive Modeling for Magnesium Alloy Sheet
Jong K. Lee,June K. Lee,Hyung S. Kim,Heon Y. Kim 한국소성가공학회 2010 기타자료 Vol.2010 No.6
Magnesium alloys have been increasingly used in automotive and electronic industries because of their excellent strength to weight ratio and EMI shielding properties. However, magnesium alloys have low formability at room temperature due to their unique mechanical behavior (twinning and untwining), prompting for forming at an elevated temperature. In this study, a temperature dependent constitutive model for magnesium alloy (AZ31B) sheet is developed. A hardening law based on non linear kinematic hardening model is used to consider Bauschinger effect properly. Material parameters are determined from a series of uni-axial cyclic experiments (T-C-T or C-T-C) with the temperature ranging 150-250℃. The influence of temperature on the constitutive equation is introduced by the material parameters assumed to be functions of temperature. Fitting process of the assumed model to measured data is presented and the results are compared.