A Study on the Compressive Stress Relaxation of Cotton Fiber Assemblies

In the past, many investigators have carried out the studies on the compressive properties of fiber assemblies. In this report, we studied on the compressive stress relaxation among the compressive properties and obtained the following conclusions. (1) The compressive stress relaxation rate of cotton fiber assemblies has a maximum value at volume ratio 0.150.20 and at the temperature 3040°C. (2) The expression for the compressive stress relaxation of cotton fiber assemblies is given by the following formula : Sr=σ/σ0=Kln (coth (1/2 (2e-a0t+B))) where Sr, σ and t are the rate of residual stress, stress (σ0 being initial stress) and time respectively, and K, a0 and B are experimental constants.