双轴向载荷下苎麻织物经纬向的交互作用  

Interactive effect between warp and weft directions of ramie textile under biaxial load

作　　者：陈复明[1,2] 王戈[1] 程海涛[1] 张文福[1] 李贤军[2] 谌晓梦[1] 

机构地区：[1]国际竹藤网络中心,北京100102 [2]中南林业科技大学,湖南长沙410004

出　　处：《纺织学报》2011年第6期50-55,共6页Journal of Textile Research

基　　金：林业公益性行业科研专项(201004005);国家高技术研究发展计划(2010AA101701);国际竹藤网络中心基本科研业务费专项基金资助项目(1632010007)

摘　　要：针对植物纤维织物在实际使用条件下经纬向载荷交互影响的问题,对苎麻纤维织物在(0°、15°、30°、45°、60°、75°、90°)7个面内方向和经向设置不同载荷阈值时的力学性能进行双向拉伸试验,并用数字散斑相关方法对其应变场进行表征。结果表明:纬向载荷对经向载荷的影响较大,随着纬向载荷的线性增加,经向载荷非线性增大,经纬向载荷比、应变绝对值减小;泊松比基本不变,其均值、变异系数分别为0.338、0.484%;随着经向与X轴夹持角度的变化,X、Y方向载荷均值有正弦曲线特征;在15°和75°、30°和60°的载荷箱形统计图有与45°的箱型图呈轴对称分布的趋势。双轴向拉伸载荷下,当经向载荷是单向或双轴向破坏强力的62.2%、65.3%时,纬向载荷对经向的影响程度最大,最大载荷、应变率分别为2.593 N/s、0.092 s-1。For the issue of interactive effect between warp and weft of fabric under practical working environment,the mechanical properties of ramie fiber fabric at（0°,15°,30°,45°,60°,75°,90°） seven-plane directions and at warp direction set different load threshold values were investigated by biaxial tensile test,and the strain filed was characterized by using digital speckle correlation.The results showed that interactive effect between warp and weft existed and the influence of load at weft on warp was larger than warp on weft.As the load at weft direction linear increased,force values at warp direction nonlinear increased and load ratio,the absolute value of strain at warp and weft directions decreased,but Poisson ratio kept the same essentially since the average and coefficient of variation respectively were 0.338 and 0.484%.As the angle for X-axis and warp direction increased,loading mean value curve at X and Y axis had sine-curve characteristic.There was an axisymmetric distribution trend for loading box charts at 15°and 75°,30°and 60°with the box chart at 45°.The greatest effect of weft on warp happened when the warp-load is about 62.2%,65.3% of the unaxial and biaxial breaking strength,and the maximum rates of load and strain respectively were 2.593 N/s and 0.092 s-1.

关 键 词：数字散斑相关方法 交互作用 双轴向拉伸 泊松比 应变场 苎麻织物 

分 类 号：TS101.923.1[轻工技术与工程—纺织工程]