Accession Number : AD0846680

Title :   Stress Analysis of Tape Reinforced Composites,

Corporate Author : MONSANTO RESEARCH CORP ST LOUIS MO

Personal Author(s) : Chen, Paul E. ; Lewis, Thomas B.

Report Date : JAN 1969

Pagination or Media Count : 40

Abstract : The paper gives the results of both the theoretical and experimental stress analyses of composite materials reinforced with tapes. The reinforcing materials for such composites are characterized as two-dimensional elements which are isotropic in planes parallel to the faces. The theoretical work is based on the finite-element method. This method utilizes the direct stiffness concept which considers a structural system as an assemblage of idealized elastic elements, joined together at discrete nodes. Experimentally, the photoelastic technique is employed to determine the stresses around the glass tapes embedded in an epoxy matrix. The specimens, containing a number of aligned tapes, were loaded in tension parallel to the width of the tape. The variation of shearing stress in the matrix at the tape-matrix interface as well as the perturbation effect on normal stress in the tape are discussed. Moreover, the results for two basic elastic moduli of the tape reinforced composites are compared with those of the corresponding fibrous systems. (Author)

Descriptors :   (*COMPOSITE MATERIALS, STRESSES), (*REINFORCED PLASTICS, TAPES), EPOXY RESINS, GLASS, MODULUS OF ELASTICITY, PHOTOELASTICITY, PERTURBATION THEORY, INTERFACES, ALIGNMENT, REINFORCING MATERIALS.

Subject Categories : Laminates and Composite Materials
      Miscellaneous Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE