HOU, X., ACAR, M. and SILBERSCHMIDT, V.V., 2011. Non-uniformity of deformation in low-density thermally point bonded non-woven material: effect of microstructure. Journal of Materials Science, 46(2), pp. 307-315.
One of the most important characteristic features of a low-density thermally bonded non-woven material is its discontinuous and non-uniform microstructure, resulting in a complicated and unstable deformation mechanism of the material. In order to estimate the effects of such microstructure on the overall mechanical properties of the non-woven material, tensile tests are carried out for specimens with different systems of marks for both two principle directions—machine direction and cross direction—with images being captured with high-speed camera. The non-uniform strain fields are analysed based on the obtained images. Discontinuous finite-element models are developed to study the deformation mechanism of nonwoven specimens in both principle directions, and the effects of the discontinuous and non-uniform fibrous network and different arrangements of bond points are analysed numerically.
The final publication is available at Springer via http://dx.doi.org/10.1007/s10853-010-4800-1