抄録
By the application of the principle of double elasticity theory to the torsional displacement of sliver-like fibre system in which Young's modulus E, Poisson's ratio ∑, Shear modulus G, and structure factor L, R, ρ are given by the same expressions as in the previous paper, the theoretical formula of the relationship between torsional moment and twist angle per unit length, M(θ), are derived in the following:
And assuming that λ=0 or λ=1, this formula will be deduced to the case of spun yarn of staple fibres or multi-filament yarn, respectively.
