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AssigneeToray Industries, Inc.
InventorsKiyoshi Homma, Akira Nishimura
Estimating the term…
A reinforcing woven fabric comprising warps of reinforcing filamentary yarns arranged to form a high-density portion of warps and low-density portion of warps in the transverse direction and wefts of reinforcing filamentary yarns extending obliquely to the warps, a preformed material formed using a plurality of the reinforcing woven fabrics, a fiber reinforced composite material formed using the preformed material and a beam particularly suitable as the fiber reinforced composite material. The high-density portion of warps in the reinforcing woven fabric can satisfy the strength and rigidity against bending or tensile stress required for the flange of the beam and the obliquely extending wefts in the low-density portion of warps can satisfy the strength against shear stress required for the web of the beam, when a plurality of the reinforcing woven fabrics are laminated to form the preformed material for the beam. The mechanical properties required for the beam can be efficiently obtained.
A reinforcing woven fabric for use in fiber reinforced composite materials comprising:
A preformed material for use in fiber reinforced composite materials, said preformed material having a plurality of reinforcing woven fabrics laminated and integrated to each other, each of said reinforcing woven fabrics comprising (a) a plurality of warps of reinforcing filamentary yarns extending in a longitudinal direction of said reinforcing woven fabric in parallel to one another in a sheet-like form, said warps being arranged in a transverse direction of said reinforcing woven fabric to form a portion with a high density of said warps and a portion with a low density of said warps, said sheet-like form having a central portion and two side portions in said transverse direction, said central portion being formed as said low density portion of the warps and at least one of said side portions being formed as said high density portion of the warps, said warps of the low density portion and said warps of the high density portion being grouped respectively, said warps of the high density portion having a yarn size larger than a yarn size of said warps of the low density portion, and (b) a plurality of wefts or reinforcing filamentary yarns extending in a direction across said warps and oblique to said longitudinal direction of extension of said warps in parallel to one another in a sheet-like form;
A fiber reinforced composite material including a preformed material comprised of a plurality of reinforcing woven fabrics laminated and integrated to each other and a matrix containing said plurality of reinforcing woven fabrics comprising (a) a plurality of warps of reinforcing filamentary yarns extending in a longitudinal direction of said reinforcing woven fabric in parallel to one another in a sheet-like form, said warps being arranged in a transverse direction of said reinforcing woven fabric to form a portion with a high density of said warps and a portion with a low density of said warps, said sheet-like form having a central portion and two side portions in said transverse direction, said central portion being formed as said low density portion of the warps and at least one of said side portions being formed as said high density portion of the warps, said warps of the low density portion and said warps of the high density portion being grouped respectively, said warps of the high density portion having a yarn size larger than a yarn size of said warps of the low density portion and (b) a plurality of wefts of reinforcing filamentary yarns extending in a direction across said warps and oblique to said longitudinal direction of extension of said warps in parallel to one another in a sheet-like form;
A beam constructed from a fiber reinforced composite material, said beam having a flange and a web, said fiber reinforced composite material including a preformed material comprised of a plurality of reinforcing woven fabrics laminated and integrated to each other and a matrix containing said plurality of reinforcing woven fabrics;
Dependencies are inferred from the claim text.