Accession Number:

ADA409603

Title:

Pressure Effects and Surface Cracks in a Rubbery Particulate Composite

Descriptive Note:

Technical paper

Corporate Author:

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

Personal Author(s):

Report Date:

2001-03-06

Pagination or Media Count:

6.0

Abstract:

During the manufacture, handling, and storage of rubbery particulate composites, cracks develop in the material that threaten structural integrity. Previous fracture tests used edge cracked geometries to simplify analysis. Hopefully, these simple experimental results are applicable to a wide range of crack geometries. However, we can increase our confidence in these testing methods by also testing more realistic crack geometries. In this work, surface cracked specimen experiments supplement previous tests conducted under pressure on single edge notched tension SENT specimens. The testing of these specimens under pressure is an attempt to understand the effects of pressure, and to quantify these effects. The use of dual specimen geometries is focused on ensuring that the SENT specimen data represents a fracture toughness that is geometry independent and that the SENT derived fracture parameters can be used in the analysis of semielliptical surface flaws in the structural application.

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE