Theory of Elasticity for Plain-Weave Fabrics. 1st Report. New Concept of Pseudo-Continuum Model.

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  • 平織布の弾性理論　第１報　　擬似連続体モデル
  • ヒラオリヌノ ノ ダンセイ リロン ダイ1ポウ ギジ レンゾクタイ モデル

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A new concept of pseudo-continuum model for plain-weave fabrics is proposed to analyze the complicated nonlinear behaviour under in-plane problems. The deformation of plain-weave fabric is categorized into three types in view of thread deformations, that is, skewing, straightening and extension. In this categorization, it is assumed that the bending and shear of threads caused by heterogeneousness or friction can be neglected. The skewing and straightening give rise to in-plane transverse compressive strain, and the extension means axial tensile strain. The warp and weft are individually subjected to these two strains with in-plane and anti-plane finite rotation. The geometrical nonlinearity, therefore, arises from the finite rotation of threads, while these strains are defined in the sense of infinitesimal strain. The framework of this pseudo-continuum model which consists of the equilibrium equation, the strain-displacement relationship and the constitutive law is newly constructed. The nonlinear behaviour under biaxial extension, that is a characteristic mechanical behaviour of the plain-weave fabric, is analyzed for the proof of validity of the proposed model.

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