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21-Cr 페라이트계 스테인리스강의 기계적 물성 모델링과 적용
정한용(Hanyong Jung),정양진(Yangjin Chung),박기철(Keecheol Park),남재복(Jaebok Nam) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
In this paper, phenomenological material models describing anisotropic plastic behavior of 21-Cr ferritic stainless steel were investigated using three yield functions of Hill(1948), Barlat and Lian(1989) and Barlat et al.(2003, referred to as Yld2000-2d) criteria. Uniaxial tension and equi-biaxial bulge test were conducted for mechanical properties. Three yield functions calculated from experiments were used for comparing to the one element simulation using LS-DYNA. The results presented that the three directional tensile properties by Yld2000-2d criterion were in good agreement with tensile test Thinning distribution calculated by Yld2000 2d model was compared to those of the real part of door in
외상에 의한 정신 및 행동장애에 대한 법원 감정의 실태와 문제점에 관한 연구
류성곤,정한용,이병철,안경남 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.6
Traumatic injury can result not only in physical disability but also in mental and behavioral sequelae. It is very important to properly judge the severity of disability as well as the need for assistance and future medical treatment. It is very difficult to establish objective guidelines for assessing mental and behavioral disabilities due to the inherent peculiarity of the disabilities. This study uses reports generated for court because they need to be more judicious than reports for other types of evaluation. We analyzed reports concerning the facts and problems associated with evaluation of mental and behavioral disabilities. We hope this study will help further our understanding of mental and behavioral disabilities.