面料拉伸性能与运动文胸防震功能的定量关系  

Quantitative relationship between fabric elasticity and shock absorption performance of sportsbras

作　　者：盛欣洋 陈晓娜[1] 卢娅娅 李艳梅[1] 孙光武 SHENG Xinyang;CHEN Xiaona;LU Yaya;LI Yanmei;SUN Guangwu(School of Textiles and Fashion,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学纺织服装学院,上海201620

出　　处：《纺织学报》2024年第1期161-167,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(11802171)。

摘　　要：为探究面料拉伸性能与运动文胸防震功能之间的定量关系,选取6种不同针织面料,先分别测量不同面料拉伸率为30%时的弹性模量来表征其拉伸性能,然后将这6种面料作为罩杯部分用料制作文胸,其它部位为同种面料。以运动假人为实验对象,在其表面选取7个位置粘贴标记点,采用三维人体动作捕捉系统,采集实验对象在模拟10 km/h跑步过程中各标记点的坐标变化,并计算出各点在局部坐标系下的相对位移。以运动过程中运动文胸对乳房竖直位移的减小作用来表征其防震功能,通过曲线拟合与模型筛选得出面料拉伸性能与文胸防震功能的定量关系。结果表明:6款罩杯面料动态最大拉伸率均值为30%,说明实验中用拉伸率为30%时的弹性模量表征面料的拉伸性能较为合理。罩杯面料弹性模量与乳房竖直位移间存在显著负相关,即面料弹性模量越大,乳房竖直位移越小,表明文胸防震功能越好;幂函数模型可作为以罩杯面料弹性模量预测75C实验对象10 km/h跑步运动时乳房竖直位移的首选模型。未来可通过测量罩杯与乳房之间的静动态压力及乳房-罩杯整体刚度探究罩杯面料拉伸性能对文胸防震功能的影响机制。Objective Anti-shock performance of sportsbras is closely related to the tensile properties of fabrics adopted to produce the sportsbras,but seldom research was published on the qualitative and quantitative relationship between the two aspects.The aim of this study is to explore the quantitative relationship between the tensile properties of cup fabrics and the shock-absorbing performance of sportsbras,and to provide data support for the optimization design of sportsbras in the future.The study also aims to investigate the fabric stretching condition of sportsbra during exercise.Method Three coordinates of seven markers representing the trunk and breast movement were recorded with no bra and with six sportsbras used.A dynamic mannequin with 75C-cup breastswas adopted to simulate the vertical breast movement at the running speed of 10 km/h.Six sportsbras were produced with exactly the same structure,and the same materials except for the cup materials which were with different elasticity modulus in vertical direction.The quantitative relationship between elasticity modulus of cup materials and vertical breast displacement relative to trunk was fitted by ten curve-fit models.The static and dynamic stretch of cup materials were measured and calculated.Results The mean maximum dynamic stretch of the six cup fabrics was(53.44±2.75)mm(rangeing from 50.63-58.55 mm).The mean maximum dynamic elongation of the six cup materials was 30.02%(ranging from 19.52%to 42.80%),implying that it is reasonable to select the elasticity modulus of 30%elongation as the index of cup fabrics.The vertical breast displacement under the no-bra condition was 21.84 mm,and the vertical breast displacement under the six bra conditions ranges from 9.69 mm to 19.76 mm.Pearson test result shows significant negative correlation(r=-0.886,P=0.019<0.05)between the elasticity modulus of cup materials and vertical breast displacement relative to trunk.Using vertical breast displacement under no-bra condition as the reference,less vertical breast displacem

关 键 词：运动文胸 面料弹性模量 防震功能 乳房竖直位移 曲线拟合 运动假人 

分 类 号：TS941.17[轻工技术与工程—服装设计与工程]