Accession Number : ADA292805

Title :   Effect of Fiber-Matrix Interphase on Transverse Tensile Strength and Fracture Resistance of Organic Composite Materials.

Descriptive Note : Final rept. Oct 91-Sep 93,

Corporate Author : NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA

Personal Author(s) : Tsai, Hsi C. ; Arocho, Annette

PDF Url : ADA292805

Report Date : 04 SEP 1993

Pagination or Media Count : 279

Abstract : Unidirectional fiber reinforced composites have a very low transverse tensile strength. This strength is much lower than the strength of the pure matrix and limits the performance of the composite system. The objective of this IR program is to develop analytical methods which predict the transverse tensile failures of organic composites and to examine how various parameters influence the transverse tensile strength and failure modes. Analytical methods developed in this study included micromechanical models for the composite without initial microcracks and micromechanical models for the composite with initial microcracks. Through these models, local stress distribution, stress intensity factor, and thermal residual stresses were calculated. Guidelines and design charts for the improvement of the transverse tensile strength were also developed. (MM)

Descriptors :   *TENSILE STRENGTH, *FIBER REINFORCED COMPOSITES, *FRACTURE(MECHANICS), MATHEMATICAL MODELS, STRESS ANALYSIS, TWO DIMENSIONAL, COMPOSITE MATERIALS, FINITE ELEMENT ANALYSIS, ONE DIMENSIONAL, MATRIX MATERIALS, STRAIN(MECHANICS), DEFECTS(MATERIALS), ORGANIC MATERIALS, RESIDUAL STRESS, FAILURE(MECHANICS), MICROMECHANICS, THERMAL STRESSES, TRANSVERSE, UNIDIRECTIONAL, MICROCRACKING.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE