2019 年 32 巻 5 号 p. 192-202
A method to design the two-dimensional shapes of patterns of two piece brassiere cup is proposed. A brassiere cup consists of several patterns and their shapes are designed by repeatedly making a paper cup model and then checking its three-dimensional shape. This process requires much trial and error and would benefit from an improvement in design efficiency. The form of a brassiere is characterized by two curves: the ridge line and the lower edge of the cup. If their three-dimensional shapes are determined, the two-dimensional shape of a pattern must be designed so that its edges coincide with individual curves. When the two-dimensional shape of an edge of a paper pattern and the three-dimensional shape of a target curve are given, the surface of the pattern is uniquely determined. This means that the surface of the pattern is obtained from one edge and one target curve and another surface of the pattern is obtained from the other edge and the other target curve. Then, the pattern can be designed by optimizing both shapes of edges so that both surfaces completely overlap each other. It was experimentally verified that the edges of a designed pattern formed the target shapes.
