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http://dx.doi.org/10.3795/KSME-A.2003.27.11.1856

Description of Hysteresis Loops using Modified Overlay Model  

Yoon, Sam-Son (한국과학기술원 기계공학과)
Hong, Seong-Gu (한국과학기술원 기계공학과)
Lee, Soon-Bok (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.11, 2003 , pp. 1856-1863 More about this Journal
Abstract
Overlay model had several advantages to describe hysteretic behavior of material and showed good capability for many engineering materials. However, this model is only applicable to material obeying Masing postulate. Some materials such as 316L stainless steel do not follow Masing postulate and show cyclic hardening(or softening) and strain range dependence. Low cycle fatigue tests of 316L stainless steel at 600$^{\circ}C$ were performed to investigate the characteristics of cyclic behavior of non-Masing material. From all tests cyclic softening was observed. There were differences in elastic limit of hysteresis loop according to applied strain range. To consider these features, modified overlay model was developed. Yield stresses of subelements were divided into isotropic and anisotropic part to describe the non-Masing behavior. The plastic strain range memorization was introduced to consider the strain range dependence. The prediction using modified overlay model showed a good accordance to actual hysteresis loops.
Keywords
Overlay Model; Hysteresis Loop; Master Curve; Cyclic Softening; Elastic Limit; Plastic Strain Range Dependence;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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