Laminated structure of fiber reinforced plastics and shock-absorbing structure

A laminated structure of fiber reinforced plastic for absorbing impact energy, characterized in that

• said laminated structure is composed of a carbon-fiber reinforced plastic sheet adapted to be disposed with its opposite surfaces lying parallel to the direction of an impact load, and a pair of aramid fiber reinforced plastic sheets adhered to the opposite surfaces of said carbon-fiber reinforced plastic sheet,
• each of said aramid fiber reinforced plastic sheets has aramid fibers oriented at a given angle of 30.degree. to 60.degree. with respect to the direction of the impact load,
• a plurality of said laminated structures are assembled crosswise such that outer surfaces of the respective aramid fiber reinforced plastic sheets are parallel with the direction of the impact load, and
• said assembled plurality of laminated structures have a cutout recess and a bulged portion formed in at least one of said laminated structure at an end thereof adjacent to an intersection of the assembled plurality of laminated structures.

A laminated structure of fiber reinforced plastic for absorbing impact energy, characterized in that

• said laminated structure is composed of a carbon-fiber reinforced plastic sheet adapted to be disposed with its opposite surfaces lying parallel to the direction of an impact load, and a pair of aramid fiber reinforced plastic sheets adhered to the opposite surfaces of said carbon-fiber reinforced plastic sheet,
• each of said aramid fiber reinforced plastic sheets has aramid fibers oriented at a given angle of 30.degree. to 60.degree. with respect to the direction of the impact load,
• each of said pair of aramid fiber reinforced plastic sheets has a first group of aramid fibers oriented at a said given angle of +30.degree. to +60.degree. with respect to the direction of the impact load, and a second group of aramid fibers oriented at a said given angle of -30.degree. to -60.degree. wit respect to the direction of the impact load and intersecting said first group of aramid fibers,
• a plurality of said laminated structures are assembled crosswise such that outer surfaces of the respective aramid fiber reinforced plastic sheets are parallel wit the direction of the impact load, and
• said assembled plurality of laminated structures have a cutout recess and a bulged portion formed in at least one of said laminated structures at an end thereof adjacent to an intersection of the assembled plurality of laminated structures.

A laminated structure of fiber reinforced plastic for absorbing impact energy, characterized in that

• said laminated structure is composed of a carbon-fiber reinforced plastic sheet adapted to be disposed with its opposite surfaces lying parallel to the direction of an impact load, and a pair of aramid fiber reinforced plastic sheets adhered to the opposite surfaces of said carbon-fiber reinforced plastic sheet,
• each of said aramid fiber reinforced plastic sheets has aramid fibers oriented at a given angle of +30.degree. to +60.degree. with respect to the direction of the impact load, and the other of said pair of aramid fiber reinforced plastic sheets has aramid fibers oriented at a said given angle of -30.degree. to -60.degree. with respect to the direction of the impact load,
• a plurality of said laminated structures are assembled crosswise such that outer surfaces of the respective aramid fiber reinforced plastic sheets are parallel with the direction of the impact load, and
• said assembled plurality of laminated structures have a cutout recess and a bulged portion formed in at least one of said laminated structures at an end thereof adjacent to an intersection of the assembled plurality of laminated structures.