Adaptive method of designing a swimsuit bra

The relevance of the research lies in the need to develop accurate and effective methods for designing swimwear bras, considering the elastic properties of modern knitted fabrics, which will enhance the comfort and quality of the products. The purpose of the study was to develop a method of adjusting the size of the bra cup to the amount of stretching using the method of geodetic parallels. The study employed methods of mathematical modelling for the development and optimisation of swimsuit bra cups design and analysed the mechanical properties of knitted materials. The study identified representative groups of elastic knitted fabrics based on the analysis of their tensile characteristics. Two primary groups of fabrics were identified based on their fibrous composition: the first group consisted of polyamide threads blended with elastane, while the second group comprised polyester threads combined with elastane. Anthropomorphic factors affecting the inaccuracies in the unfolding of the hard surface of the cup have been identified. Recommendations have been developed for transforming the rigid unfolding into a soft shell of moulded cup parts, considering discrete elongations of knitted materials. The soft-shell construction method was based on recalculating the main dimensions of the cup, taking into account the deformation coefficients of the materials. The effectiveness of the proposed method was confirmed by comparing the deviation areas of the moulded cup sweeps of the basic design. The deviation of the area of 3.56% indicated the compliance of the rigid sweep with the breast surface. Mathematical models of modification methods for four types of bra cup separation have been developed. The practical value lies in the use of an effective method of designing swimwear bras that ensures precise fit and comfort by considering the elastic properties of knitted materials