Accession Number : ADA303134

Title :   Design and Testing of Small Composite Specimens.

Descriptive Note : Final rept.,

Corporate Author : NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO

Personal Author(s) : Sharma, Avva V.

PDF Url : ADA303134

Report Date : DEC 1981

Pagination or Media Count : 73

Abstract : An experimental investigation was conducted to study the effect specimen size on the buckling strains of liminates subjected to low velocity projectile impact. The fiber composite selected was T3OO/52O8 graphite/epoxy system. The quasi-isotropic laminates tested had 16 and 32 plies. The results were compared with those of a 48-ply laminate tested elsewhere. Specimens of three different lengths with length to width aspect ratios of 1, 1.5 and 2 were also studied. The results show that (a) the specimen length does not have any significant influence on the buckling strains at failure caused by the projectile impact, (b) the influence of specimen thickness on the strains at failure would decrease as the velocity of the impacting projectile increases. (MM)

Descriptors :   *FIBER REINFORCED COMPOSITES, *IMPACT STRENGTH, *TERMINAL BALLISTICS, *KINETIC ENERGY PROJECTILES, *GRAPHITE EPOXY COMPOSITES, THICKNESS, IMPACT, LAMINATES, STRAIN(MECHANICS), LOW VELOCITY, BUCKLING, DESIGN CRITERIA, FAILURE(MECHANICS), ASPECT RATIO.

Subject Categories : Laminates and Composite Materials
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE