Determination of residual stresses in a steel fastener by neutron diffraction

Nick Nickoletopoulos, Michel Hone, R. B. Rogge, James Nemes

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

Residual stresses can arise from any operation involving nonuniform plastic deformation or thermal gradients. These elastic residual stresses add to the stress due to external loads, potentially leading to premature failure. Neutron diffraction has been used to non-destructively map internal residual strains on a semi-finished fastener. Neutrons can probe several centimeters into industrial materials to determine local values of strain, unlike X-rays which are limited to a depth of a few microns. Residual stresses are then calculated from strains using the generalized Hooke's Law. In forthcoming work, these results will be used to validate an elasto-plastic finite element model of a cold-headed fastener.

Original languageEnglish (US)
Pages (from-to)242-248
Number of pages7
JournalProceedings of the Annual Convention of the Wire Association International
StatePublished - Jan 1 1999
EventProceedings of the 1999 69th Annual Convention -Wire and Cable Technical Symposium (WCTS) - Atlanta, GA, USA
Duration: May 3 1999May 4 1999

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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