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치주인대의 비선형 거동을 고려한 하악 견치의 유한요소해석
양훈철(HoonChul Yang),김기태(KiTae Kim),하만희(ManHee Ha),손우성(WooSung Son) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Hyperelastic constitutive equations for nonlinear deformation of the periodontal ligament were<br/> investigated. The parameters in the strain energy potentials were obtained from experimental data for uniaxial<br/> and shear responses of the human periodontal ligament. The hyperelastic constitutive equations based on two<br/> strain energy potentials was also compared with the linear elastic equation, which is recently reported. The<br/> best fitted parameters in the strain energy potentials was applied to finite element program (ABAQUS) to<br/> simulate special orthodontic treatment of a mandibular canine.
양훈철(Hooncheul Yang),송철화(Chul Hwa Song),김무환(Moo Hwan Kim) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
The objective of this study is to propose an experimental calibration facility in which a heat flux sensor can be calibrated under conductive condition by using helium gas. The heat flux calibration facility was designed, simulated and manufactured for use in a high heat transfer condition. It delivers heat fluxes up to a maximum of 35 ㎾ m-2. A copper block heated electrically with 3.5㎾ power is designed to produce uniform temperature up to 600 K across its face. High heat fluxes are provided between hot plate and cold plate by 1 mm height helium filled gap. A cold plate is maintained around 300 K through pool boiling using a refrigerant and water-cooled heat exchanger. A simulation was conducted to verify the design of the main test section. To verify the performance of calibration facility, a heat flux sensor was examined. The measured heat fluxes were compared to the calculated one.
양훈철(Hoon-chul Yang),최홍석(Hong-seok Choi),정협재(Hyup-jae Chung) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
An articulated robot is being increasingly used in the industrial and service fields in order to improve human life as well as to increase operating efficiency. In this type of robot, operating mechanism is so complicated that the components suffered severe loading conditions. In particular, a variety of operating modes such as torsion, bending and tension, which results in the breakage of a conductor, is applied to the cable that supplies the robot with electric power. Therefore, proper design for this cable has been one of the important issues for improving the durability with respect to the various operating modes. In this study, the effect of the filler material and the cabling pitch on the durability under torsion loading condition will be discussed. For this, numerical simulation using a CableCAD software was conducted to evaluate the tension load which affects on durability under torsion loading condition. The durability of designed cables is also evaluated by a torsion tester. As a result of the simulation and experiment, durability based on the torsion can be improved by employing softened filler material and reduced cabling pitch.