2인승 소형 전기자동차 디자인에 관한 연구

학위논문(석사)--서울대학교 대학원 :산업디자인과 공업디자인전공,1995.Maste

Development of Three-Dimensional Analysis System for Various Metal Forming Processes

In the present study, a three-dimensional finite element analysis system, CAMPform 3D was developed for the analysis of metal forming processes. CAMPform 3D is composed of a solver based on the thermo-rigid-viscoplastic approach and graphic user interface(GUI) based pre/post-processors for the effective description of forming conditions as well as graphic display of simulation results. In particular, the solver was developed using hexahedral elements for deformation analysis and tetrahedral elements for heat transfer analysis of dies. In order to resolve remeshing problems which occur during simulations, a hexahedral mesh generator based on the master grid approach was developed. For the construction of tetrahedral mesh systems for heat transfer analysis of dies, a tetrahedral mesh generator based on the advancing front technique was developed, In this paper, the overall structure and computational background of CAMPform 3D will be briefly explained and several three-dimensional analysis results of metal forming processes will be shown. From the currents results, it is construed that CAMPform 3D can be effectively used for three-dimensional analyses of practical metal forming processes

Development of PC-based Simulation System for Metal Forming

It is well known that the quality and efficiency of the design of metal forming processes can be significantly improved with the aid of effective numerical simulations. In the present study, a two-and three-dimensional finite element simulation system, CAMP form, was developed for the analysis of metal forming processes in the PC environment. It is composed of a solver based on the thermo-rigid-viscoplastic approach and graphic user interface (GUI) based pre-and post-processors to be used for the effective description of forming conditions and graphic display of simulation results, respectively. In particular, in the case of CAMPform 2D (two-dimensional), as the solver contains an automatic remeshing module which determines the deformation step when remeshing is required and reconstructs the new mesh system, it is possible to carry out simulations automatically without any user intervention. Also, the forming analysis considers ductile fracture of the workpiece and wear of dies for better usage of the system. In the case of CAMPform 3D, general three-dimensional problems that involve complex die geometries and require remeshing can be analyzed, but full automation of simulations has yet to be achieved. In this paper, the overall structure and computational background of CAMPform will be briefly explained and analysis results of several forming processes will be shown. From the current results, it is construed that CAMPform can be used in providing useful information to assist the design of forming processes

Finite element analysis of safety estimation of structures at elevated temperatures based on unified viscoplastic constitutive equation

학위논문(석사) - 한국과학기술원 : 기계공학과, 1996.2, [ vi, 77 p. ]한국과학기술원 : 기계공학과