高密度ポリエチレンの二軸延伸加工に関する研究 : 高密度ポリエチレンの後方押出しに対するスラブ法の適用

概要

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The yielding of polymers is highly dependent on the hydrostatic component of stress. Polymers can be considered to be isotropic when they have not been cold worked, but to become highly anisotropic when plastically deformed. The work hardening of polymers at room temperature is more extensive than that of metals. These characteristics being taken into consideration on the result of a tension test of a biaxially tensioned high density polyethylen (HDPE) sheet by forging between opposing punches, the slab method is applied to the backward extrusion of HDPE with various extrusion ratios at room temperature. A good agreement is obtained between the theory and the experiments. A consideration of anisotropy is concluded to be important in applying the slab method to polymer forming.
一般社団法人日本機械学会の論文
1986-11-25