Accession Number:

ADA164693

Title:

Damage Tolerance Concepts for Critical Engine Components.

Descriptive Note:

Conference proceedings.

Corporate Author:

ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)

Personal Author(s):

Report Date:

1985-10-01

Pagination or Media Count:

290.0

Abstract:

This conference considered the overall philosophy and implications of introudcing damage tolerance concepts DTC into the design and use of critical engine components. The damage tolerant philosophy offers potential cost savings of considerable magnitude when compared with a safe-life approach, if only such a concept can be implemented with an asurance that current safety standards will not be prejudiced. It has been estimated that over 80 of engine discs have 10 or more low cycle fatigue lives remaining when discarded under safer-life rules, and it is this useful remaining life that the DTC aims to exploit in service. Apart from economic advantages, the DTC approach offers a practical method of using modern high-strength disc materials that could be rejected by the application of safe-life conditions of usage. Topics included Role of thermal and stress analyses in the application of damage tolerant design Damage tolerance acceptance methods in structural components of a medium carbon steel and a medium-strength Al-Mg alloy Manufacturing technology for nondestructive evaluation system to implement retirement for cause procedures for gas turbine engine components AGARD cooperative test program on titanium alloy engine disc material Crack growth in near-alpha titanium alloys Small defect characterization in powder metallurgy materials.

Subject Categories:

  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE