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http://dx.doi.org/10.3795/KSME-A.2013.37.10.1239

Development of Test Method for Simple Shear and Prediction of Hardening Behavior Considering the Bauschinger Effect  

Kim, Dongwook (Dept. of Mechanical Engineering, Sogang Univ.)
Bang, Sungsik (Dept. of Mechanical Engineering, Sogang Univ.)
Kim, Minsoo (Dept. of Mechanical Engineering, Sogang Univ.)
Lee, Hyungyil (Dept. of Mechanical Engineering, Sogang Univ.)
Kim, Naksoo (Dept. of Mechanical Engineering, Sogang Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.10, 2013 , pp. 1239-1249 More about this Journal
Abstract
In this study we establish a process to predict hardening behavior considering the Bauschinger effect for zircaloy-4 sheets. When a metal is compressed after tension in forming, the yield strength decreases. For this reason, the Bauschinger effect should be considered in FE simulations of spring-back. We suggested a suitable specimen size and a method for determining the optimum tightening torque for simple shear tests. Shear stress-strain curves are obtained for five materials. We developed a method to convert the shear load-displacement curve to the effective stress-strain curve with FEA. We simulated the simple shear forward/reverse test using the combined isotropic/kinematic hardening model. We also investigated the change of the load-displacement curve by varying the hardening coefficients. We determined the hardening coefficients so that they follow the hardening behavior of zircaloy-4 in experiments.
Keywords
Simple Shear; Bauschinger Effect; Zircaloy-4 Sheet; Optimum Tightening Torque; Combined Hardening Model;
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