Accession Number : AD0629898

Title :   LOCAL AND BENDING STRESSES IN LAYERED MATERIALS WITH BONDED INTERFACE.

Descriptive Note : Technical memo.,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK ORDNANCE RESEARCH LAB

Personal Author(s) : Chapman,B. L.

Report Date : 10 NOV 1965

Pagination or Media Count : 104

Abstract : The objective of this thesis was to obtain quantitative stress data for layered materials with bonded interface subjected to a static point load. Two distinct cases were considered: (1) local stresses due to a concentrated load applied to a semi-infinite composite body, and (2) bending stresses due to a point load applied to a composite beam whose vertical boundaries were fixed. A theoretical solution employing methods of numerical analysis where the composite is considered as a discrete continuum, and a experimental solution utilizing the technique of both photoelasticity and the morie method, resulted in compatible stress levels. Only stresses in the lower or core layer were considered. Variations in the stress level due to changes in material for the upper layer and thickness of the protective layer were examined. (Author)

Descriptors :   (*SANDWICH CONSTRUCTION, STRESSES), (*COMPOSITE MATERIALS, STRESSES), BENDING, BONDING, COMPUTERS, NUMERICAL ANALYSIS, PHOTOELASTICITY

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE