http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
개별검색 DB통합검색이 안되는 DB는 DB아이콘을 클릭하여 이용하실 수 있습니다.
통계정보 및 조사
예술 / 패션
<해외전자자료 이용권한 안내>
- 이용 대상 : RISS의 모든 해외전자자료는 교수, 강사, 대학(원)생, 연구원, 대학직원에 한하여(로그인 필수) 이용 가능
- 구독대학 소속 이용자: RISS 해외전자자료 통합검색 및 등록된 대학IP 대역 내에서 24시간 무료 이용
- 미구독대학 소속 이용자: RISS 해외전자자료 통합검색을 통한 오후 4시~익일 오전 9시 무료 이용
※ 단, EBSCO ASC/BSC(오후 5시~익일 오전 9시 무료 이용)
Stress analysis of spring seat made of NBR rubber used for automotive steering ball joint was performed. Finite element technique was used for the stress analysis of the spring seat with two different section types of scoop and heart. Loading was divided into two step; plugging for ball joint assemblage and applied axial load for operation. High stress and strain concentrations were observed at the center hole of the scoop type rubber seat, where failure was expected. For the case of heart type rubber spring seat, magnitudes of stress and strain were quite small, resulting in better static/fatigue strengths than the scoop type rubber spring seat.
Ball joints in an automotive steering system are used for transferring steering forces between links and tires. In this paper, stress analyses of ball joints consisting of body, ball stud, spring seat. and plug were performed to ensure the static strength in operation. Two types of engineering plastics instead of steels such as Nylon66 and Acetal were employed as spring seat materials. Elastic-plastic finite element analysis was done to simulate the plugging and axial loadings. Equivalent plastic strains in the Nylon66 and Acetal spring seats were 47% and 26%, respectively, resulting in the values less than fracture strains. Local plastic strains occurring in the steel plugs were much smaller than the fracture strain of the material. The plastic spring seats and steel plug were evaluated to satisfy the static strength of the ball joint. Further investigations were required to ensure the durability of the ball joint.
The stiffness of subframe has a great effect on the NVH of vehicle. Usually, dampers are applied to subframe for NVH improvement. But it is inefficient because it excessively increases the weight of vehicle. It is necessary to improve stiffness while minimizing the weight gain of subframe. For this, we conducted the topology optimization and got the load path of subframe. We analyzed the load path and eliminated unnecessary parts to reduce weight. Structural important parts were reinforced to increase stiffness. It resulted in 0.3㎏ increase in the weight of subframe and 20.8㎐ increase in the natural frequency. In this study, We propose the method that improved the stiffness while minimize weight of subframe.