Accession Number : AD0772956

Title :   Edge Effect Studies in Fiber-Reinforced Laminates.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : Oplinger,Donald W. ; Parker,Burton S. ; Chiang,F. P.

Report Date : SEP 1973

Pagination or Media Count : 23

Abstract : OF VARIOUS PARAMETERS INCLUDING REINFORCEMENT MATERIAL, FIBER ORIENTATION, AND THE STRUCTURE OF THE REINFORCEMENT ON THE VARIOUS QUANTITIES WHICH ARE OBSERVED IN THE VICINITY OF FREE EDGES IN MULTIDIRECTIONALLY REINFORCED LAMINATES. Of particular interest was the confirmation of theoretical results related to differences in response of graphite-and boron-reinforced laminates. Experiments consisted of moire measurements of surface displacement patterns which were compared with theoretical predictions, and examination of failure levels. The experiments were carried out on a series of boron-and graphite- reinforced angle ply laminates in which both stacking sequence and fiber orientation were varied parametrically. Moire techniques were developed which allowed observation of displacements on both the wide surface and along the narrow edge of the laminates. (Author-PL)

Descriptors :   *Composite materials, Laminates, Fibers, Fiber reinforcement, Boron, Carbon fibers, Graphite, Epoxy resins, Stresses, Moire effects, Fracture(Mechanics)

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE