We have introduced a simulation model for the orientation distribution of crystallites for rolling, by assuming suitable aggregations of polycrystallites in high density polyethylene films. These evaluations were performed by evaluating the plastic slip in each plane of the crystal unit that induced plastic deformation in rolling. In this report, we adopted five kinds of slip systems in the crystal unit of polyethylene crystallites. The azimuthal rotations of crystal units always selected individual slip systems for plastic deformation, applyng the principle of maximum plastic work.

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We have evaluated the orientation function of each plane normal for rolling in high density polyethylene films. The pole figure device familiar in X-ray diffraction was used. These distribution functions were compared with a simulation of orientation in crystallites after rolling, by assuming polycrystalline aggregations. We analyzed the mechanism of orientation for the rolling process in which the {110}, ‹001› and (100), ‹001› slip systems dominated in three types of chain slip systems by applying the maximum plastic work principle.

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