http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : S. C. Back(백승철) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
보론강의 열간 딥드로잉시 공정변수에 따른 소재의 변형거동해석
이민식(M. S. Lee),백승철(S.C. Back),강충길(C. G Kang) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.5
Recently in the automobile industry, there have been several efforts to reduce the weight and enhance the safety of vehicles. In this study, the hardable boron steel sheet was used in hot press deep drawing process. Through hot press deep drawing, boron steel sheet alloys generally show a good formability, work hardening and a small amount of spring back. The main process parameters are punch speed, blank holding force and initial blank temperature. Experiments were performed at a constant temperature for the die and punch. The effects of the main process parameters were thoroughly investigated. After forming process, two main kinds of graphs were obtained ; (1) the graphs presenting relationship between punch load, blank holding force and forming depth and (2) the graphs presenting relationship between blank holding force, punch velocity and forming depth . Finally, the corresponding maximum punch load and maximum forming depth value were obtained for forming depth limited. Then regions of fracture and non-fracture were made with point in graph. Furthermore, the microstructural observations and hardness were conducted for different part of the formed boron steel sheets after die quenching.
-
A Theoretical Study for the Design of a New Ballistic Range
G. Rajesh,Y. K. Lee(이영기),S. C. Back(백승철),H. D Kim(김희동) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The Ballistic Range has long been employed in a variety of engineering fields such as high-velocity impact engineering, projectile Aerodynamics, creation of new materials, etc, since it can create an extremely high-pressure state in very short time. Of many different types of Ballistic Ranges developed to date, two-stage light gas gun is being employed most extensively. In the current study, a theoretical work has been made to develop a new type of Ballistic Range which can easily simulate a flying projectile. The present Ballistic Range consists of piston, pump tube, highpressure tube, shock tube and launch tube. One-dimensional, unsteady compressible equations are solved to obtain the major design parameters of the present Ballistic Range.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
