Stock material or miscellaneous articles – Structurally defined web or sheet – Including grain – strips – or filamentary elements in...
Patent
1995-12-22
1998-12-01
Raimund, Christopher
Stock material or miscellaneous articles
Structurally defined web or sheet
Including grain, strips, or filamentary elements in...
428114, 244119, 244121, B32B 512
Patent
active
058435581
ABSTRACT:
A carbon-fiber reinforced plastic sheet is excellent in tensile strength and modulus of elasticity, but defective in impact resistance and fracture toughness. To overcome the defect, two aramid fiber reinforced plastic sheets are adhered to the opposite surfaces of the carbon-fiber reinforced plastic sheet to thereby provide a laminated structure and the aramid fibers are skewed at angles of +30.degree. to +60.degree. with respect to the direction of an impact load. This arrangement exhibits an improved shock absorbing efficiency and eliminates surface distortion which would otherwise take place during lamination. Further, a shock-absorbing structure may be produced from combining a plurality of sheets assembled crosswise such that surfaces of the respective sheets lie parallel to the direction of the impact load, and a cutout recess and a bulged portion are formed at an end of at least one sheet adjacent an intersection of the structure. Thus, the one end of the sheet including the cutout recess and the bulged portion undergoes local buckling initiating from the intersection, and thereafter the entire assembly is caused to become buckled. Since complete buckling of the entire structure takes a certain period of time, the impact energy can be absorbed with a reduction of the peak load, whereby the shock-absorbing structure is suitable for use in a crushable zone in aircrafts, automobiles or the like.
REFERENCES:
patent: 4157101 (1979-06-01), Ross
patent: 4173128 (1979-11-01), Corvelli
patent: 4412474 (1983-11-01), Hara
patent: 4593870 (1986-06-01), Cronkhite et al.
patent: 4759147 (1988-07-01), Pirazzini
patent: 4946721 (1990-08-01), Kindervater et al.
patent: 5069318 (1991-12-01), Kulesha et al.
patent: 5437905 (1995-08-01), Park
J.D. Cronkhite, V.L. Berry, "Crashworthy Airframe DEsign Concepts Fabrication and Testing", NASA Contractor Report 3603, 1982.
Extract, "Shock Absorbing Structure in an Airplane", Japanese with English translation.
Fujihira Toru
Yoshizaki Yuichi
Honda Giken Kogyo Kabushiki Kaisha
Raimund Christopher
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