Controlled shot peening of structural components to prevent premature failures

Structural and transmission components have been shot peened for some time to prevent premature failure or to enable higher loads transmitted through present designs. The technique is applicable on problems of fatigue, fretting fatigue and stress corrosion cracking where these can be eliminated or significantly reduced. Recent work on metal structures has shown that by tailoring the shot peening process to suit the problem additional, benefits can be gained by examining the failure site or principal area of concern and by using a computer model, alternative procedures to improve the product performance can be recommended. Examples are given of the model in operation, working against certain failure modes. In addition an insight will be given to tomorrow's shot peening using lasers. This new technology develops a plasma burst at the surface of the material introducing a shock wave that results in residual compressive stresses on certain materials 4- to 5-fold deeper than conventional shot peening. This has already demonstrated great benefit on structural components, particularly welded assemblies, but further comparative results will be given and a video shown of the technique in operation.

Language

  • English

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Filing Info

  • Accession Number: 01011788
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-947644-43-1
  • Files: ITRD
  • Created Date: Dec 19 2005 3:32PM