Modeling of ratcheting behavior under multiaxial cyclic loading |
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Authors: | X Chen K S Kim |
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Affiliation: | (1) School of Chemical Engineering and Technics, Tianjin University, Tianjin 300072, P.R. China (E-mail: xchen@eyou.com), CN;(2) Department of Mechanical Engineering, Pohang University of Science and Technics, Pohang 790-784, Korea (E-mail: illini@postech.ac.kr), KR |
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Abstract: | Summary. A two-surface plasticity theory is used to predict ratcheting strain under multiaxial loading. A kinematic hardening rule
that combines the Mroz and Ziegler hardening rules is employed along with the plastic modulus given as an exponential function
of the distance between the yield surface and the bounding surface. Model results are compared with the experimental data
obtained on medium carbon steel under proportional and nonproportional axial-torsional loading. The model predicts reasonably
well the experimental ratcheting behavior at relatively low cycles. Predictions overshoot the actual ratcheting strains at
high cycles, yet the results look favorable compared with other data found in the literature.
Received July 29, 2002; revised January 15, 2003
Published online: May 20, 2003
The authors gratefully acknowledge financial support for this work, in part from Brain Korea 21 Program at Pohang University
of Science and Technology, and in part from National Natural Science Foundation of China and TRAPOYT. |
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