Computational modelling of manually stitched soccer balls
Computational modelling of manually stitched soccer balls
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DOI：
10.1243/14644207jmda83
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发表时间：
2006-10-01
影响因子：
2.4
通讯作者：
Harland, A. R.
中科院分区：
文献类型：
--
作者：
Price, D. S.;Jones, R.;Harland, A. R.
足球是主要的球类运动，吸引了全世界的观众和参与者。主要装备需求是球，而足球市场与这项运动本身一样竞争激烈。这项运动的全球性兴趣为足球、靴子、手套、护腿板和服装等运动装备的营销提供了理想的国际舞台。跨国体育器材制造商努力追求卓越的产品性能以实现商业优势，而足球的设计和开发是实现这一目标的关键活动。这项工作详细介绍了精英比赛中使用的手动缝合织物加固 32 片球的有限元 (FE) 模型的开发。生成了基本的二十面体有限元模型来描述薄壁各向同性均质壳，随后对其进行了增强，以包括类似骨骼的更硬的缝合区域。进行材料测试以确定气囊、外板和缝合材料的机械性能，并通过超弹性应变能势方程在每个模型中进行规定。刚度比例阻尼系数也用于描述动能损失特性。每个模型都通过动态条件下的实验冲击测试进行了验证，这些动态条件代表了游戏、恢复系数评估、接触时间和变形。结果发现，先进的足球模型准确地反映了球在整个击球过程中的变形行为。
Soccer is the major ball sport, which attracts both viewers and participants worldwide. The primary equipment requirement is the ball, and the soccer ball market is as competitive as the game itself The global interest of the sport provides an ideal international stage for the marketing of sports equipment such as soccer balls, boots, gloves, shin guards, and apparel. Multinational sports equipment manufacturers strive for superior product performance to enable commercial advantage, and the design and development of soccer balls is a crucial activity in achieving this. This work details the development of a finite-element (FE) model of a manually stitched textile-reinforced 32-panel ball used in an elite competition. A basic icosahedron FE model was produced to describe a thin-walled isotropic homogeneous shell, and this was subsequently enhanced to include a skeletal-like stiffer stitching region. Material testing was carried out to determine the mechanical properties of the bladder, outer panel, and stitching materials and prescribed within each model by a hyperelastic strain energy potential equation. A stiffness proportional damping coefficient was also used to describe kinetic energy loss characteristics. Each model was validated by an experimental impact testing under dynamic conditions that are representative of play, evaluation of coefficient of restitution, contact time, and deformation. It was found that the advanced soccer ball model accurately represented the deformation behaviour of the ball throughout impact.