Mihai Aura, Seul Arina, Curteza Antonela, Costea Mariana
Faculty of Industrial Design and Business Management, "Gheorghe Asachi" Technical University of Iasi, 700050 Iasi, Romania.
Materials (Basel). 2022 Jul 22;15(15):5107. doi: 10.3390/ma15155107.
This paper aimed to define two critical mechanical properties of leather-Young's modulus and Poisson ratio-essential to the virtual simulation of the behaviour of the footwear uppers against the manufacturing operations of stitching and perforating. The following technological aspects were considered to analyse the materials from manufacturing conditions point of view: the number of layers (one layer and two layers), the nature of the materials used for uppers subgroups (calfskin-outer upper, sheep leather-lining, polyester knitted fabric-lining), the overlapping width in the stitching area, the number of parallel stitches (single stitch and double stitch), the punching interval and the type of perforations (simple and with eyelets), resulting in nine kinds of samples. Furthermore, the elasticity (Young's modulus) and lateral contraction (Poisson's ratio) were calculated during the tensile strength analysis performed on the SATRA STM 466 equipment. Both mechanical parameters are essential to simulate the behaviour of the virtual footwear prototypes in various conditions.
本文旨在确定皮革的两个关键力学性能——杨氏模量和泊松比，这对于虚拟模拟鞋帮在缝制和打孔制造操作中的行为至关重要。从制造条件的角度考虑了以下工艺方面来分析材料：层数（一层和两层）、鞋帮子组所用材料的性质（小牛皮——外层鞋帮、绵羊皮——衬里、聚酯针织面料——衬里）、缝合区域的重叠宽度、平行缝线的数量（单针和双针）、冲孔间隔和穿孔类型（简单穿孔和带孔眼穿孔），从而得到九种样品。此外，在SATRA STM 466设备上进行拉伸强度分析时计算了弹性（杨氏模量）和横向收缩（泊松比）。这两个力学参数对于模拟虚拟鞋类原型在各种条件下的行为都是必不可少的。
