A New Procedure to Measure Near Yield Residual Stresses Using the Deep Hole Drilling Technique
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Mechanical strain relief techniques for estimating the magnitude of residual stress work by measuring strains or displacements when part of the component is machined away. The underlying assumption is that such strain or displacement changes result from elastic unloading. Unfortunately, in components containing high levels of residual stress, elastic-plastic unloading may well occur, particularly when the residual stresses are highly triaxial. This paper examines the performance of one mechanical strain relief technique particularly suitable for large section components, the deep hole drilling (DHD) technique. The magnitude of error is calculated for different magnitudes of residual stress and can be substantial for residual stress states close to yield. A modification to the technique is described to allow large magnitudes of residual stress to be measured correctly. The new technique is validated using the case of a quenched cylinder where use of the standard DHD technique leads to unacceptable error. The measured residual stresses using the new technique are compared with the results obtained using the neutron diffraction technique and are shown to be in excellent agreement.
KeywordsResidual stress Finite element analysis Deep hole drilling Plasticity
The work described here was a result of a joint project with the University of Oxford and was sponsored by EPSRC under grant number GR/T10558/01. The neutron diffraction work was supported by Dr E Oliver at ISIS. Prof Smith acknowledges the support of a Royal Society Wolfson Merit award.
- 2.Smith DJ (2003) The influence of the prior loading on structural integrity, 7, chapter 9. In: Ainsworth RA, Schwalbe KH (eds) Comprehensive structural integrity. Elsevier, London.Google Scholar
- 5.Cheng W, Finnie I (1986) Measurement of residual hoop stresses in cylinders using the compliance method. Trans ASME J Eng Mater Technol 1082:87–92.Google Scholar
- 8.Rosenthal D, Norton JT (1945) A method of measuring triaxial residual stresses in plates. J Weld Res 24Suppl:295–307.Google Scholar
- 9.Zhdanov IM, Gonchar AK (1978) Determination of welding residual stresses at a depth in metals. Autom Weld 319:22–24.Google Scholar
- 10.Beaney EM (1978) Measurement of sub-surface stresses. CEBG Report No. RD/B/N 4323.Google Scholar
- 11.Smith DJ, Bonner NW (1994) Measurement of residual stresses in a thick section steel weld. In: Edward JH, Kerr J, Stanely P (eds) Engineering integrity assessment. Engineering Materials Advisory Services Chamelon Press, Birmingham, pp 259–274.Google Scholar
- 12.Bonner NW (1996) Measurement of residual stresses in thick steel Welds. PhD thesis, University of Bristol.Google Scholar
- 16.Kingston EJ, Stefanescu D, Mahmoudi AH, Truman CE, Smith DJ (2006) Novel applications of the deep-hole drilling technique for measuring through-thickness residual stress distributions. J ASTM International 3(4). doi: 10.1520/JAI12568.
- 17.Lin YC, Chou CP (1995) Error induced by local yielding around hole in hole drilling method for measuring residual stress of materials. J Mar Sci Technol 116:600–604.Google Scholar
- 19.Vangi D, Ermini M (2000) Plasticity effects in residual stress measurement by the hole drilling method. Strain 362:255–259.Google Scholar
- 24.Mahmoudi AH, Pavier MJ, Truman CE, Smith DJ (2007) Accurate measurement of highly triaxial residual stresses. Proceedings of the Society for Experimental Mechanics (SEM) Conference, Springfield, Massachusetts, USA, CD.Google Scholar
- 26.Kingston E (2003) Advances in the deep hole drilling technique for residual stress measurement. PhD thesis, University of Bristol.Google Scholar
- 27.ABAQUS Users Manuals, version 6.4 (2006) Hibbit Karlsson, Sorenson Inc., 1080 Main street, Pawtucket RI, 02860-4847, USAGoogle Scholar
- 28.Hossain S (2005) Residual stresses under conditions of high triaxiality. PhD thesis, University of Bristol.Google Scholar
- 29.Fitzpatrick ME, Lodini A (2003) Analysis of residual stress by diffraction using neutron and synchrotron radiation. Taylor and Francis, London.Google Scholar