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김주헌(Ju Hun Kim),이은택(Eun Taik Lee),김덕재(Duck Jae Kim) 한국강구조학회 1995 韓國鋼構造學會誌 Vol.7 No.2
Based on the existence of a yield surface and a bound surface which represents the maximum stress state the material ever experienced, a plasticity model is modified to describe the behaviour of metal under nonproportional loadings. This paper is concered with the improvement of a plasticity model of the two surface type for structural steel based on experimentally observed features of 304 stainless steel specimens tested under axial torsional cyclic nonproportional loading condition at room temperature performed by Medowell. The proposed model is verified through an experimental program that includes different combinations of nonproportionally applied forces performed by Lee.
반복하중에 의한 철골부재의 소성힌지 거동에 관한 실험적 연구
이은택(Eun Taik Lee),김덕재(Duck Jae Kim) 한국강구조학회 1993 韓國鋼構造學會誌 Vol.5 No.2
Most research studies on inelastic material behavior of steel structures under earthquake ground motions are concentrated on general uniaxial cyclic loading conditions. Very limited attention has been given to the responses of structures subjected multiaxial and nonproportional loading condition. The primary objectives of these experiments are to obtain quantitative information on the cyclic and nonproportional loading behavior of wide-flanged A-36 structural steel, and to substantiate a plasticity model to describe the material behavior under severe earthquake loading condition by using a computer-controlled testing system. The response of W-shaped A-36 structural steel specimens subjected to selected pure bending, pure bending with constant axial loads, and the random nonproportional loadings are examined.
이하선관과 안면신경의 협근지 사이의 해부학적 관계 분석
손은택,최환준,남두현,김준혁,이영만,Son, Eun Taik,Choi, Hwan Jun,Nam, Doo Hyun,Kim, Jun Hyuk,Lee, Young Man 대한두개안면성형외과학회 2013 Archives of Craniofacial Surgery Vol.14 No.2
Background: When using the anterior approach for performing superficial parotidectomy, the first thing to do is to find the buccal branch of the facial nerve and the parotid duct. The buccal branch usually runs transversely with the parotid duct from the anterior border of the parotid gland. We wanted to check the relationship between the two structures during the operation and to get clinically helpful information. Methods: Twelve patients with parotid mass were treated with superficial parotidectomy between May 2012 and August 2012. The outline of superficial and deep lobes of the parotid gland, parotid duct, and the buccal branch of the facial nerve were drawn on the transparent film by tracing the structures intraoperatively. Results: In 7 (58.3%) of 12 cases, the buccal branch of the facial nerve was located more caudally than the parotid duct at the anterior border of the superficial lobe of the parotid gland. In 3 cases (25%), the buccal branch was located more cephalically than the parotid duct. The mean distance between two structures were $2.54{\pm}1.48$ mm. In 11 cases, the parotid duct was located deeper than the buccal branch. Conclusion: The buccal branch of the facial nerve tends to be located more caudally than parotid duct and runs more superficially than parotid duct in all cases. We identified the relationship between the parotid duct and the buccal branch of the facial nerve during the operations on living subjects, not from the cadavers, so it would be a clinically helpful study which supplied more accurate anatomical information.