【作者】 胡吉永； 王如彬； 丁辛； 杨旭东；

【Author】 HU Ji-yong,WANG Ru-bin,DING Xin(1.Key Lab of Textile Science & Technology,Ministry of Education,Donghua University,2999 North Renmin RD.,Songjiang District,Shanghai 201620,China;2.College of Textiles,Donghua University,2999 North Renmin RD.,Dongjiang,District,Shanghai 201620,China;3.Institute for Brain Information Processing and Cognitive Neurodynamics.East China University of Science and Technology,Meilong Road 130,Shanghai 200237,China)

【机构】 东华大学纺织面料技术教育部重点实验室； 东华大学纺织学院； 华东理工大学理学院认知神经动力学研究所；

【摘要】 伸出纺织品表面的短、粗纤维末梢是形成贴身纺织品针刺感的主要原因,通常以判定固定-铰接约束条件的弹性压杆稳定性的临界压力衡量纤维末梢诱发皮肤伤害性机械刺激感受器的可能性。然而,这种方法忽略了织物握持纤维末梢的强度、纤维末梢接触皮肤的滑动阻力及其柔韧性特征。本文以伸出织物表面的直立纤维末梢为对象,假设其织物握持端为线弹性转动约束、接触皮肤端受皮肤的接触反作用力和滑动阻力作用,建立纤维末梢刺扎人体前臂皮肤的弯曲变形力学模型。通过参数化模拟,本文比较分析了所建立的弹性-支撑约束条件和现有固定-铰接约束条件下的纤维末梢的弯曲变形行为的差异。研究发现,弹性-支撑约束条件下纤维末梢的弯曲力学行为能解释大多数模拟单纤维刺扎皮肤的力学实验现象,以及感官实验中纤维末梢诱发的针刺感现象。更多还原

【Abstract】 Coarse and short fiber ends protruding above fabric surface mainly contribute to prickiness sensation of next-to-skin clothing,and the delectability of this sensation usually is based the justification on the critical buckling force of single fiber end as a fixed-hinged slender rod under axial compression.The assumption that a fiber end prickling human skin is fixed-hinged,however,can be too simplified to describe the real constraint conditions,both the end prickling human skin and the other end held in fabric.To clarify the role of different constraint conditions in the bending mechanical behavior of single fiber protruding fabric surface and prickling human skin,a coupling fiber-skin model is established to simulate the prickling indentation into skin,where the end against human skin is constrainted by fiber-skin friction and the other end held in fabric surface can rotate with a linear elastic stiffness,and then a parametric analysis on friction coefficient and rotation stiffness is performed.The results shows that the elastic-constraint fiber end can subject to a higher axial compression force than the psychophysical threshold of perceived prickliness sensation,and most of published prickliness phenomenon can be explained on the base of the established fiber-skin model with friction and elastic constraints.更多还原