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프레스경화 공정 시 강판의 열-변형 거동의 유한요소해석과 실험적 연구
김성주,김형섭,백승철,서민홍,방원준,이홍노 대한금속재료학회(대한금속학회) 2001 대한금속·재료학회지 Vol.39 No.9
The press hardening process, which is the hot pressing of steel parts using cold dies, can utilize both ease of shaping and high strength due to the hardening effect of rapid quenching during the pressing. In this study, a thermo-elastoplastic analysis of the press hardening process using the finite element method was performed in order to investigate the deformation behaviour and temperature history during the process and the mechanical properties of the pressed parts. The effects of friction on the thermal-deformation behaviour of steel sheets are investigated. We also carried out experiments of temperature measurements during pressing and quenching of a car bumper part to obtain the experimental heat transfer coefficients for comparison with the predictions. It was found that the strength of the press hardened boron steel sheet can increase up to about Hv 430 due to the rapidly quenched microstructure consisting of martensite. The finite element analysis can produce useful information for the process optimisation.
차량 샤시 설계를 위한 CAE 시스템 환경 구축에 관한 연구
양경덕,배대성,이형복,방원준,송용만 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A CAE(Computer Aided Engineering) system for design of the chassis of a vehicle is developed. The present commercial programs for an analysis of mechanical systems are not easy to use for bachelor level of design engineers. This paper presents environments of a developed CAE system.<br/> The developed CAE system is operated on MS Windows, using its major merits. The system can carry out kinematic, quasi-static and dynamic analysis of a vehicle suspension and chasssis synthesis of a vehicle. All data and results are stored in database, and designers can extract them from the database.<br/>
[論文] 자동차용 고무 부품에 대한 대변형 유한요소해석
김헌영(H. Y. Kim),최천(C. Choi),방원준(W. J.Bang),김재수(J. S. Kim) 한국자동차공학회 1993 오토저널 Vol.15 No.1
The objective of this study is to analyze the static and dynamic characteristics of automotive rubber components by computer simulation. Bush /rectangular type engine mounts and wind shield weather strip are analyzed by using the commercial code ABAQUS and the results are verified by experiments. Large deformation static response is analyzed in order to get the information about the deformation pattern and static stiffness of engine mounts, and about the seperation force of wind shield weather strip from body. The isothermal steady-state dynamic response of components which have been subjected to an initial static pre-load is analyzed for the dynamic stiffness of engine mount rubber components. There are good agreements between simulation and experiments. So it is possible to apply the computer simulation to the design of automotive rubber components.