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http://dx.doi.org/10.3795/KSME-A.2006.30.7.757

A Description of Thermomechanical Behavior Using a Rheological Model  

Lee Keum-Oh (한국과학기술원 기계공학과)
Hong Seong-Gu (한국과학기술원 기계공학과)
Lee Soon-Bok (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.30, no.7, 2006 , pp. 757-764 More about this Journal
Abstract
Isothermal cyclic stress-strain deformation and thermomechanical deformation (TMD) of 429EM stainless steel were analyzed using a rheological model employing a bi-linear model. The proposed model was composed of three parameters: elastic modulus, yield stress and tangent modulus. Monotonic stress-strain curves at various temperatures were used to construct the model. The yield stress in the model was nearly same as 0.2% offset yield stress. Hardening relation factor, m, was proposed to relate cyclic hardening to kinematic hardening. Isothermal cyclic stress-strain deformation could be described well by the proposed model. The model was extended to describe TMD. The results revealed that the hi-linear thermomechanical model overestimates the experimental data under both in-phase and out-of-phase conditions in the temperature range of $350-500^{\circ}C$ and it was due to the enhanced dynamic recovery effect.
Keywords
Thermomechanical Fatigue; Elevated Temperature; A Rheological Model; A Bi-linear Model;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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