Abstract
The development of deformation of needle-punch materials is a stepwise process related to overcoming the friction between fibres and subsequent redistribution of the load on the active fibres. The development of tensile strain of less than 10% is determined by the fibre packing density attained during needle-punching. In stretching by more than 10%, the dependences of the deformation and strength characteristics of the material on the needle-punching density coincide and have maximum values at the critical value of the needle-punching density.
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