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45${\circ}$ 문합각을 가진 동맥과 PTFE 단측 문합의 유한요소해석
한근조,김형태,안성찬,신정욱,김영호,Han, Geun-Jo,Kim, Hyeong-Tae,An, Seong-Chan,Sin, Jeong-Uk,Kim, Yeong-Ho 대한의용생체공학회 1997 의공학회지 Vol.18 No.3
Von Mises stress and compliance distribution was evaluated using a finite element analysis on the anastomosis of an artery with length of 20mm(z direction, along the horizental artery), inner diameter of 4mm, thickness fo 0.5mm and a PTFE graft with length of 5.7mm, inner diameter of 2mm, thickness of 0.2mm when anastomotic angle was $45^{\circ}$ and inner pressure of 1330 dyne/mm2 was applied inside the 2 conduits. From the analysis results were obtained as follows. (1) Artery diameter increased in both horizontal x(along the length of artery) and vertical y(perpendicular to the length of artery)directions and the magnitude of that in x direction was bigger than that in y direction. (2) The compliance was maximum on the anastomosis, especially on that with acute angle. The reduction of compliance was observed from the anastomosis area to the either right or left end. (3) The equivalent stress was maximum on top in the y direction and minimum on the nodes apart $110^{\circ}$ in circumferential direction from the top. (4) The equivalent stress was maximum in t도 vicinity of anastomosis with acute angle along the longitudinal direction of the artery. This trend was also observed along the PTFE graft.
한근조(Geun-jo Han),안찬우(Chan-woo Ahn),김태형(Tae-hyong Kim),심재준(Jae-joon Shim),한동섭(Dong-seop Han),이호(Ho Lee) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
In this paper, we design a wedge type rail clamp which can protect container crane from wind with constant clamping force regardless of the operating period When we design wedge type rail clamp, it is important to determine the angle of wedge and analyze a contact conditon of roller and wedge so that we might develop a rail clamp with variable capacity. Therefore, this paper suggest a process to decide wedge angles within feasible range which could be obtained using load analysis and FEA of wedge type rail clamp.
마찰용접된 Torque Rod의 굽힘 피로수명에 관한 연구
하정민(Jeong-Min Ha),한동섭(Dong-Seop Han),한근조(Geun-Ho Han) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The torque rod was located at the drive shaft of a bus or truck. The torque rod support the drive shaft and reduce the shock from movement of the drive shaft. In this study, We conducted the structural analysis and fatique analysis of the friction welded torque rod using the Ansys workbench as a universal analysis program. From the result, the friction welded torque rod satisfied the fatigue cycle criterion demanded from the industry. The thickness difference between the end rod and tube affected the stress distribution of torque rod and that affected the fatigue cycle of the friction welded torque rod.