抄録
In this study, we investigate the effect of pitch-to-diameter ratio on homogeneous pattern transformation of gel films with a square lattice of holes. Finite element analysis is performed using an inhomogeneous filed theory of polymeric gels in equilibrium. Periodic units consisting of 2x2 unit cells are analyzed with different pitch-to-diameter ratios. Geometrical imperfections are introduced using oriented elliptical holes. It is found that a small imperfection magnitude predicts the transformation into a diamond plate pattern (DPP) regardless of the value of pitch-to-diameter ratio, while a large imperfection magnitude predicts DPP when p/d < 4 but not DPP when p/d> 3. When buckling is dominant, DPPs appear and transformation becomes homogeneous, while, when creasing is dominant, patterns depend on initial imperfections, and transformation becomes inhomogeneous.
