| Summary: | 碩士 === 國立虎尾科技大學 === 創意工程與精密科技研究所 === 98 === Due to its lightweight and high specific strength,magnesium alloy has been widely used for metal shell of electronic products. In this study the formability at non-isothermal of AZ31 magnesium alloy sheets are studied by the conical
cup value, the circular cup and the square cup drawing experiments and finite element analysis. Also to confer the validity of experimental dies applied in the square cup drawing experiment. The finite element method and statistical analysis are maneuvered to confer the relationship between significant process parameters, such as radius of punch, radius of die corner, forming temperature,and friction coefficient, and also to confer the validity of experimental dies applied in the Different types of experiment. A finite element-based code is utilized to investigate the material flow characteristics under different process parameters, and the abductive network is then employed to synthesize the data sets obtained from numerical simulations, thus establishing a predictive model.From this model, an optimal blank contour for producing Magnesium the circular cup and the square cup drawing with ear-less can be found. Experiments were carried out with Magnesium sheet blanks at various temperature for some cases, and the results of experiments show good agreement with the FEM calculations.
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