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김형제(H. J. Kim),김병탁(B. T. Kim) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
A reinforced hydraulic hose includes rebar layers of a steel wire to control internal pressure. Usually, the hose behavior is affected by the resultant of the longitudinal and circumferential forces produced by the internal pressure. The rebar layers can appear the most ideal rebar effect when they are arranged to the same direction as the resultant force. The braid angle applied in the rebar layers is an important factor in determining ultimate burst pressure and overall hose life. In this paper, especially the rebar element were used to take the layer orientation such as the relative position, the number and the angle into consideration. The stress variation characteristics of a reinforced hydraulic hose is analyzed with respect to the internal pressure using the finite element method.
동력 조향장치용 호스와 금속 용구사이의 접촉력에 관한 연구
김형제(H. J. Kim),김병탁(B. T. Kim),김광희(K. H. Kim),윤문철(M. C. Yoon) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
A power steering hose is generally manufactured by the swaging process. In this process the hose is inserted into metal fittings and compressed in the radial direction by the jaws to clamp the hose with metal fittings together. In case they are subjected to various mechanical and thermal loads under the real operating conditions, the oil in hose can leak at the parts of small clamping forces. Also, jaw stroke is very important design factor during the swaging process. In this paper, the contact forces between the power steering hose and the metal fittings are analyzed with respect to the jaw stroke using the finite element method. Investigations were focused on the stress and strain values at the maximum jaw and the contact normal forces after the jaw release, between the hoses and the metal fittings.
김형제(H. J. Kim),김병탁(B. T. Kim),고성위(S. W. Koh) 한국동력기계공학회 2005 동력시스템공학회지 Vol.9 No.3
A high-pressure hose includes rebar layers of the synthetic fiber such as nylon or a steel wire to control internal pressure. The hose assembly is manufactured through the swaging process to clamp the hose into the metal fittings. Usually, the hose behavior is affected by the resultant of the longitudinal and circumferential forces produced by the internal pressure. The rebar layers can appear the most ideal rebar effect when they are arranged to the same direction as the resultant force. The braid angle applied in the rebar layers is an important factor in determining ultimate burst pressure and overall hose life. Failure can occur on the contacted parts of a hose with the metal fittings under severe operating conditions such as high pressure and temperature of the inner fluid. In this paper, the mechanical behavior between the hose and the metal fittings during the swaging process and the stress variation characteristics of a high-pressure hose under a constant applied pressure are analyzed with respect to the braid angle of steel wire using the finite element method.