| Summary: | 碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 94 === Abstract
This study proposes two analysis methods to investigate the plastic
behavior and characteristics of three-layer clad sheet of compression
forming. The friction can be assumed as constant shear friction, the
frictions for the upper and lower dies can be different. The outer surface
shape, the effective strain distribution, the compression force can be
obtained from the upper bound method (UBM), but the stress distribution
cannot be found from UBM, it can be found from the slab method (SM).
With a view to exploring the plastic behavior of the three-layer clad sheet
compression forming, the mathematical models based on the slab method
and upper bound method are respectively established to investigate effects
of the various compression conditions, such as the clad thickness ratio, the
shear yield stress ratio, the frictional factor ratio, the width thickness ratio,
frictional factor ratio, and reduction ratio, on various stress distributions
and compression force. The compression forces based on both the models
are compared to prove the feasibility of the two models, and the analysis
results can offer to the forging industries.
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