Development of a Nonlinear Cumulative Fatigue Damage Methodology for Aircraft Engine Components under Multiaxial Loadings

Abstract

This report summarizes the results of a study focusing on the development of a robust methodology for cumulative fatigue damage analysis of aircraft engine alloys. This effort consisted of an experimental component and an analytical component. The experimental test program was designed to provide critical information related to damage accumulation, including effects such as multiaxiality of the stress field and LCF/HCF interactions. A new critical-plane based multiaxial fatigue damage parameter was proposed that provided good correlation with experimental test data. Finally, a nonlinear cumulative damage model was developed, based on the damage curve concept, that accounts for load-sequence and load-interaction effects, as well as damage caused by sub-threshold HCF cycles.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2007
Accession Number
ADA589686

Entities

People

  • Alan Kallmeyer

Organizations

  • North Dakota State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircraft Engines
  • Aircrafts
  • Engine Components
  • Engines
  • Experimental Data
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • Fracture (Mechanics)
  • Load Control
  • Materials
  • Materials Testing
  • Mechanical Engineering
  • Mechanics
  • Sequences
  • Shear Stresses
  • Tensile Stress
  • Turbines

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.