Accession Number:

ADA409285

Title:

Damage Mechanisms and Crack Growth in a Particulate Composite Material

Descriptive Note:

Technical paper

Corporate Author:

AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV

Personal Author(s):

Report Date:

1998-05-19

Pagination or Media Count:

4.0

Abstract:

In recent years, fibrous composite materials have been widely used in aerospace and automobile industries due to their high modulus and strength to weight ratio. Particulate composites, though not as effective as the continuous fibrous composites in improving modulus and strength of the matrix materials, are also widely used in construction and commodity industries for their improved performance over the matrix material in, for example, thermal and electrical conductivities, friction and wear resistance, machinability, surface hardness, and cost effective. However, much of the studies about the particle reinforced polymeric composites are on the derivation of the effective elastic properties and the development of the constitutive models of the materials. In recent years, a considerable amount of work has been done in studying the crack growth behavior in highly filled polymeric materials. These materials consist of hard particles contained in a soft elastomeric binder. Experimental results indicate that power law relationships exist between the crack growth rate and the Mode I stress intensity factor which are consistent with the theories developed by Knauss and Schapery in their study of crack growth in viscoelastic materials.

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE