纺织学报 ›› 2010, Vol. 31 ›› Issue (12): 53-58.

• 纺织工程 • 上一篇    下一篇

三维载荷下苎麻织物力学性能评价

王戈1;陈复明1.2;程海涛1;李贤军2   

  1. 1. 国际竹藤网络中心 2.中南林业科技大学
  • 收稿日期:2010-01-19 修回日期:2010-05-25 出版日期:2010-12-15 发布日期:2010-12-15
  • 通讯作者: 王戈

Evaluation of mechanical properties of ramie fabric under three-dimensional load

WANG Ge1;CHEN Fuming1,2;CHENG Haitao1;LI Xianjun2   

  1. 1. International Center for Bamboo and Rattan 2. 2. Center South University of Forest and Technology
  • Received:2010-01-19 Revised:2010-05-25 Online:2010-12-15 Published:2010-12-15

摘要:

针对织物在实际工作环境下受到复杂应力问题,对苎麻织物在单向、双轴向拉伸、顶破和三维载荷下的力学性能进行研究,并用数字散斑相关方法对不同受力方式下的应变场进行表征。研究结果显示:双轴向载荷下织物的泊松比为-0.3114,经、纬向弹性模量分别为6624、2656 N/m,经向断裂强力较单向拉伸时小,纬向较单向拉伸时大,变异系数都变大;双轴向载荷下X方向的应变场波动介于经、纬单向拉伸之间。协方差和相关分析表明,三维载荷下顶破强力的差异主要由顶破方式决定,经、纬断裂强力的相关系数是0.613。偏相关分析表明,有13.72%是由顶破强力协同作用产生的。

Abstract:

For complex stress issues of fabric under practical working environment, mechanical properties of ramie textile were investigated under uniaxial and biaxial directions, bursting and three-dimensional load, and the strain fileds of different force bearing modes were characterized by using digital speckle correlation. The poisson ratio is 0.3114, warpwise and weftwise elastic modulus is 6624 N/m, and 2656 N/m respectively under biaxial load. Breaking strength under uniaxial force is larger than that in warpwise, but smaller than that in weftwise. Coefficient of variations in both warp-and weftwise are larger when compared with unaxial tension. X direction strain-field under biaxial load fluctuations lies between unaxial tensions of weft and warp. Covariance and correlation analysis showed that the difference of bursting strength under three-dimensional load was primarily determined by bursting ways, correlation coefficient between breaking strength of warp and weft is -0.613. Partial correlation analysis showed that there is 13.72% generated by synergy effects of bursting strength.

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