Investigation of Laser Shock Processing. Volume 1. Executive Summary

Abstract

The objective of the program was to demonstrate that shock processing is a viable method of improving the fatigue and crack growth performance of mechanically fastened joints. It was shown that a decrease in crack growth rate can be achieved under specified conditions. These conditions involve compressive residual stress (induced by the process) which modify the crack shape and reduce and stress intensity factor. 2024-T3 aluminum alloy reacted better to the process than 7075-T6 aluminum. Results were better in thin (.125 inch) than thick (.250 inch) material. Initial design environmental and cost studies indicate that a laser shock processing system for use on a production line is feasible.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1980
Accession Number
ADA092976

Entities

People

  • A. H. Clauer
  • B. P. Fairand
  • R. D. Galliher
  • S. C. Ford

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Aluminum
  • Aluminum Alloys
  • Amplitude
  • Cargo Aircraft
  • Crack Propagation
  • Environment
  • Failure Mode And Effect Analysis
  • Fatigue Life
  • Lasers
  • Materials
  • Residual Stress
  • Stress Waves
  • Stresses
  • Tensile Stress
  • Transport Aircraft

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Metallurgy
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Directed Energy