科研之友
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摘要
Bending rigidity of fabric is an important property attracting much attention in the fields of measuring and modelling. In this work, a Fixed-Supported elastic beam is proposed. The fabric strip is fixed at one end and simply supported at the other end. In this way, the errors due to twisting or curling of the free end of fabric can be omitted. The fabric is deflected under its own uniformly distributed weight. The experiments were carried out on different types of fabrics and different beam lengths were tested. Using a digital camera and image processing method, the geometric shape of the bent fabric was recorded and maximum deflection of the fabrics was obtained. According to the theory, small deflection equation holds as long as there is a linear relation between maximum deflection and fourth power of beam length. To investigate this, the plots of maximum deflection vs. forth power of beam length were obtained. The results reveal that the variation of maximum deflection vs. fourth power of beam length indicates a good linear trend with high linear regression coefficient. It can be concluded that Fixed-Supported beam in the case of small deflection can be used to calculate the bending rigidity of fabric with an acceptable accuracy. From the slope of the fitted line, the bending rigidity of the fabric was calculated.
- 出版日期2014-1-2
