PURPOSE: To obtain three-dimensional woven fabric for skeleton of composite material having small deformation and excellent strength by bonding a pair of L-shaped constituent piece and a flat constituent piece into a section T-shaped state, forming the constituent pieces from an inner arrangement-based layer of both X and Y planes a bias-based layer and a thickness direction base of bonding these layers.
CONSTITUTION: Two L-shaped constituent piece 1a and 1b are combined with one flat constituent piece 1c, bonded into a section of approximately T-shape and the constituent pieces 1a, 1b and 1c consist of yarn layer of lining a first inner arranged yarn in the direction along a joint part 3 of laminar parts 2a, 2b and 2c in a plane wherein the constituent pieces 1a, 1b and 1d are perpendicular in the thickness direction thereof, a second inner arranged yarn lined in a direction perpendicular to the yarn layer in a plane parallel to the yarn layer, a bias yarns layer slantingly lined at given angles from both the arranged yarn and yarn in the thickness direction, bonding each layer perpendicular to the yarn layers. When the three-dimensional woven fabric is used as a skeleton material of composite material, an amount of the skeleton material deformed in the bias direction is reduced and the skeleton material shows high strength against tensile load, compression load or twist load.
AMANO MASAAKI
ANAHARA AKIJI
