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등가질량을 갖는 Honey-comb 구조물과 원통형 보강 구조물의 강성에 관한 연구
박기훈(K.H.Park),김현수(H.S.Kim),최경호(K.H.Choi),김형준(H.J.Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
In general, the reinforcement of a structure is performed with cylinders. In this study, it is attempted to compare the safety circular reinforcement with 4 fins and Honey-comb at the equal mass. Circular reinforcement with 4 fins have two kind of the models. One has no hole in the upper and lower plates. The other has holes, and it is divided by 3 cases. And the maximum stress is investigated for the circular reinforcement with 4 fins and Honey-comb.<br/> The result shows that honey-comb is more strength than the others. And reinforcement with 4 fins of hole case2's maximum stress is 82% by compare to honey-comb.
사각 평판에서 타원의 회전에 따른 응력집중계수의 변화에 관한 연구
김현수(H. S. Kim),최태원(T. W. Choi),최경호(K. H. Choi),박기훈(K. H. Park),권영석(Y. S. Kwon) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.10
Sometimes open holes are required for the function and the weight reduction of structure and machinery. However, the serious stress concentration occurs because of the geometric discontinuity caused by the holes and cutting section. In this study, it is attempted to obtain the stress concentration coefficients of the inner surface of the hole boundary by changing the rotate angle of holes on the homogeneous isotropic plate. And the effects on the plate are investigated. The results show that the stress level becomes low and the distribution area widens the position of stress concentration just at 90˚ as being the angle β increases.