Damage Tolerance Concepts for Critical Engine Components.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1985
- Accession Number
- ADA164693
Entities
Organizations
- AGARD