[특허]Filament reinforced structural shapes

Filament reinforced structural shapes 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-003/20
출원번호	US-0512593 (1974-10-07)
발명자 / 주소	Cogburn Jimmie W. (Fort Worth TX) Chitwood Billie E. (Fort Worth TX) Howeth Marvin S. (Fort Worth TX)
출원인 / 주소	General Dynamics Corporation (Fort Worth TX 02)
인용정보	피인용 횟수 : 76 인용 특허 : 0

초록 ▼

Strong, lightweight structural shapes or structures adapted for anistropic load bearing useful as structural beams or stiffeners for other structures, e.g., aircraft and which prevent or have improved resistance to forces tending to peel apart the structures, i.e., incipient peel. The shapes are fabricated from plicated laminates of strips or sheets of resinous, filament reinforced, composite materials having high strength and low weight. Fabrication of the shapes is carried out in such manner that upon curing of the resin the resultant stiffener shapes are capable of distributing loading forces so as to reduce localization of stresses.

대표청구항 ▼

A structural beam formed from a plurality of plies of composite material each containing high tensile strength filaments in a resin matrix laid up together and cocured around a plurality of reinforcing strips of unidirectionally arranged high modulus filaments to form a unitary beam structure combining high strength and low weight with resistance to internal peel forces and crack propagation comprising: a. an upper member extending in the longitudinal direction of the beam; b. a lower cap member extending in the longitudinal direction of the beam and spaced from said upper cap member; c. said upper and lower cap members each having at least one strip-like stiffener means therein containing a plurality of high modulus of elasticity stiffening filaments generally unidirectionally arranged generally parallel to the length of the beam for providing resistance to bending and compression forces at upper and lower or basal portions of said structure; d. substantially planar shear web means containing a plurality of layer of high tensile strength filaments integrally connecting said upper and lower cap members for transmitting loading forces therebetween, the filaments of each of said layers being generally transverse with respect to the filaments of said stiffener means; e. said filaments held in a resin matrix material for bonding the filaments in the desired configuration and transmitting of loading forces between filaments; f. said web means at least at said lower cap member having generally oppositely directed flange portions extending generally transverse to said web means and integrally connected therewith for distributing the loading forces in said shear web means to the lower cap member along oppositely directed paths and to opposite sides of said web means; g. said upper cap member stiffener means extending to substantially the full width of the upper cap member; and h. said lower cap member stiffener means having a prism-like configuration of generally triangular cross-section and disposed longitudinally of the beam between said oppositely directed flange portions of the web means, upper outer-directed surfaces of said lower cap member stiffener means prism-like configuration being formed to a radius-like concave curvature and bonded to inner-directed surfaces of said web means flange portions along said concavely curved surfaces and the lower surface of said configuration being substantially flat and bonded to lower or basal portions of said lower cap member; and i. the filaments of said stiffener means having a higher modulus of elasticity (Young\s modulus) than the filaments of said web member to provide resistance to bending and compression forces; whereby a strong, lightweight beam structure is produced in which shear forces tending to separate said flanges from basal portions of the beam act simultaneously in opposite directions distributed over the full upper-directed area of said concavely curved surfaces, thereby decreasing the tendency for peeling forces to separate said web from said lower cap member when loading forces are acting on said beam.

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Stulc, Jeffrey F.; Chan, Wallace C.; Clapp, Brian C.; Rolfes, Neal G., Splice joints for composite aircraft fuselages and other structures.
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Stulc, Jeffrey F.; Chan, Wallace C.; Clapp, Brian C.; Rolfes, Neal G., Splice joints for composite aircraft fuselages and other structures.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Filament reinforced structural shapes 원문보기

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Filament reinforced structural shapes 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (76)

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