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열가소성수지의 저항용접 응력분포 및 강도평가에 관한 연구
윤호철(Ho-Cheol Yoon),김철인(Chul-In Kim),김연직(Yun-Jig Kim),임재규(Jae-Kyoo Lim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
This research is concerned with a study on stress distribution and strength evaluation of thermoplastic resin using resistance welding. Tensile-shear tests were carried out with the single-lap resistance welded joined specimens consisting of thermoplastic resin. polypropylene(PP), polystyrene (PS) and polyetyrene(PE) were selected. Types of base material, diameter of heat element, voltage, current, electrified time and number of weld line are set on the parameters that govern the welding process and the principal phenomena that affect the quality of the joint. The test results were presented by tensile-shear strength and the experimental set-up and the main evaluation methods are also looked at in detail. The failure mechanism was discussed in order to explain the tensile-shear strength and stress distribution of resistance welding and the relationship between stress intensity and bonding strength properties were explained.
변형속도를 고려한 Al/PC 접착제 접합부의 강도평가에 관한 연구
임재규(Jae-Kyoo Lim),윤호철(Ho-Cheol Yoon),유성철(Sung-Chol Yoo),서도원(Do-Won Seo),전양배(Yang-Bae Jeon) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.8
Adhesive bond joints are available for structural applications as understanding of adhesive bonding which has been improved. After adhesive materials are decided, the design of adhesive bonding joints is mainly focused on shape, dimension and surface treatment of joints. ill the design of single-lap joints lap length, thickness of adherend materials and surface treatment should be decided, these parameters have an main influence on strength of adhesive bonding joints. This study explains that surface treatment affects strength of Al/Polymer single-lap joints and loading speed affects adhesive strength design.
류마티스 관절염환자에서 폐침범의 진단에 있어서 면역학적 지표와 폐기능 검사의 유용성
이동석 ( Dong Suk Lee ),이창범 ( Chang Beom Lee ),고희관 ( Hee Kwan Koh ),문두섭 ( Doo Seop Moon ),이재영 ( Jae Young Lee ),이경상 ( Kyung Sang Lee ),양석철 ( Suck Chul Yang ),윤호주 ( Ho Joo Yoon ),배상철 ( Sang Cheol Bae ),신동 대한결핵 및 호흡기학회 1995 Tuberculosis and Respiratory Diseases Vol.42 No.6