Elastoplastic model of metals with smooth elastic–plastic transition
 Koichi Hashiguchi,
 Masami Ueno,
 Toshiyuki Ozaki
 … show all 3 hide
Abstract
The subloading surface model is based on the simple and natural postulate that the plastic strain rate develops as the stress approaches the yield surface. It therefore always describes the continuous variation of the tangent modulus. It requires no incorporation of an algorithm for the judgment of yielding, i.e., a judgment of whether or not the stress reaches the yield surface. Furthermore, the calculation is controlled to fulfill the consistency condition. Consequently, the stress is attracted automatically to the normalyield surface in the plastic loading process even if it goes out from that surface. The model has been adopted widely to the description of deformation behavior of geomaterials and friction behavior. In this article, it is applied to the formulation of the constitutive equation of metals by modifying the past formulation of this model. This modification enables to avoid the indetermination of the subloading surface, to make the reloading curve recover promptly to the preceding loading curve, and to describe the cyclic stagnation of isotropic hardening. The applicability of the present model to the description of actual metal deformation behavior is verified through comparison with various cyclic loading test data.
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 Title
 Elastoplastic model of metals with smooth elastic–plastic transition
 Open Access
 Available under Open Access This content is freely available online to anyone, anywhere at any time.
 Journal

Acta Mechanica
Volume 223, Issue 5 , pp 9851013
 Cover Date
 20120501
 DOI
 10.1007/s0070701206152
 Print ISSN
 00015970
 Online ISSN
 16196937
 Publisher
 Springer Vienna
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 Authors

 Koichi Hashiguchi ^{(1)}
 Masami Ueno ^{(2)}
 Toshiyuki Ozaki ^{(3)}
 Author Affiliations

 1. Kyushu University, Hakozaki 6101, Fukuoka, 8128581, Japan
 2. University of the Ryukyus, Senbaru 1, Nishihara, Okinawa, 9030213, Japan
 3. Kyushu Electric Engineering Consultants Inc., Kiyokawa 2136, Fukuoka, 8100005, Japan