Environment - Load Interaction Effects on Crack Growth

Abstract

The objective of this program was to systematically investigate chemical environment-load interaction effects on crack propagation. The program was focused by developing a set of design guidelines and criteria for a durability and damage tolerance control plan for landing gear. Current life prediction capability was assessed by comparison of prediction and test. A field survey was conducted to catalog the size, type, and locations of flaws in landing gear components. A crack growth prediction capability developed through analysis and test accounts for environment and load interaction effects. Materials studied are HP-9Ni-4Co-.30 and 300M steels, and 7075-T6 and 7049-T73 aluminums. A flight-by-flight test stress history was developed for a landing gear component, and crack growth predictions prepared. Subsequently, spectrum tests were performed. A Durability/Damage Tolerance Control Plan for landing gear is outlined.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1978
Accession Number
ADA071660

Entities

People

  • C. R. Saff
  • H. D. Dill

Organizations

  • McDonnell Aircraft Corporation

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Algorithms
  • Damage Tolerance
  • Environment
  • Landing Gear
  • Manufacturing
  • Materials
  • Materials Testing
  • Mechanical Working
  • Mechanics
  • Salt Water
  • Structural Components
  • Test And Evaluation

Readers

  • Business Analytics
  • Pavement Materials Engineering.
  • Structural Health Monitoring of Composite Structures.