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Thickness variations in polymer model. Folding patterns of regular folding for varying initial layer thicknesses of 0.30 mm, 0.60 mm, 0.80 mm, 1.00 mm, and 2.00 mm and period doubling for layer thicknesses of 0.45 mm, 0.60 mm, and 1.00 mm, from top to bottom, at constant prestretch of λ = 2.0. Figure (top) adopted from [20].
