Features and Mechanical Parameters of a Fabric's Compressional Property

The compressional and recovering curves of a fabric are considered to consist of three steps, respectively. The first and third steps of the compressional curve and the first step of the recovering curve are approximated by the linear equation (y = a + bx). The second steps of the compressional and recovering curves arc both regressed by the exponential curves y = a exp (bx) + c. The third step of the recovering curve is the region at which instantaneous recovery is impossible. The calculated compressional and recovering curves agreed very well with the experimental curves. The regression constant −b1, at the first step of the compressional curve, is related to the bending of fibres on the fabric surface and is also related to the yarn structure such as spun or filament. The regression constant −b2, at the second step of the compressional curve, is concerned with hardness in compression because of the friction between fibres. The regression constant −b3, at the third step of the compressional curve, is related to the fibre's material and can be used to explain the initial lateral compressional modulus of the fibres.