期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 27, 期 9, 页码 1309-1327出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2011.03.003
关键词
Dislocations; Bauschinger effect; Yield condition; Anisotropic material; Constitutive behavior
资金
- POSCO
- Fundacao para a Ciencia e a Tecnologia (FCT) of Portugal [PTDC/EME-TME/72402/2006]
- World Class University (WCU) through the National Research Foundation of the Korean Ministry of Education, Science and Technology [R32-10147]
- Fundação para a Ciência e a Tecnologia [PTDC/EME-TME/72402/2006] Funding Source: FCT
- National Research Foundation of Korea [R32-2011-000-10147-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this work, an approach is proposed for the description of the plastic behavior of materials subjected to multiple or continuous strain path changes. In particular, although it is not formulated with a kinematic hardening rule, it provides a reasonable description of the Bauschinger effect when loading is reversed. This description of anisotropic hardening is based on homogeneous yield functions/plastic potentials combining a stable, isotropic hardening-type, component and a fluctuating component. The latter captures, in average, the effect of dislocation interactions during strain path changes. For monotonic loading, this approach is identical to isotropic hardening, with an expanding isotropic or anisotropic yield surface around the active stress state. The capability of this constitutive description is illustrated with applications on a number of materials, namely, low carbon, dual phase and ferritic stainless steel samples. (C) 2011 Elsevier Ltd. All rights reserved.
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