Prognosis of Residual Stresses in Steel T-Beams Using Acoustic Emission Method
Conference: Publication Date: 16 March 2015Testing Method:
Poor welding technique is considered to be one of the most common causes of residual stresses during the fabrication of metallic structures. The severe thermal gradient in the welding process and uneven cooling that follows, results in residual stresses and distortion. The aim of this paper is to predict experimentally the formation of residual stresses in T-section beams using Acoustic Emission (AE) technique. Series of laboratory bending tests were carried out on four welded T-section beams with four different welding sequences and different values of residual stresses were evaluated and characterized. The AE energy measured was directly proportional to the amount of the residual stresses locked into the structure. The testing showed promising results, which indicate that AE technique could be used as a screening mechanism for monitoring residual stresses. However, further study and investigation on different specimens with different materials and dimensions should be performed.
- T. Kreis, (2005). Handbook of Holographic Interferometry: Optical and Digital Methods. UK, Wiley-VCH Verlag GmbH & Co. KGaA.
- E. Macherauch and Origin K. Kloos (1986). "Measurement and evaluation of residual stresses." Residual Stresses in Science and Technology 1: 3-26.
- Peng Cheng, et al. (2006). "Correction of butt-welding induced distortions by laser forming." Transactions of NAMRI/SME 34: 579-586.
- Paul Colegrove, et al. (2009). "The welding process impact on residual stress and distortion." Science and Technology of Welding and Joining 14(8): 717-625.
- Olabi, A. G., Casalino, G., Benyounis, K. Y., & Rotondo, A. (2007). Minimisation of the residual stress in the heat affected zone by means of numerical methods. Materials & design, 28(8), 2295-2302.
- ASTM (2014). Standard Practice for Estimating the Approximate Residual Circumferential Stress in Straight Thin-walled Tubing. USA, ASTM. ASTM E1928.
- Tana Tjhung and Keyu Li (2003). "Measurement of In-Plane Residual Stresses Varying With Depth by the Interferometric Strain Slope Rosette and Incremental Hole-Drilling." Journal of Engineering Materials and Technology 125(2): 153-162.
- Michael B. Prime and Adrian T. DeWald (2013). The contour method. “Practical Residual Stress Measurement Methods”. Wiley-Blackwell: 109-138.
- ASTM (2014). Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain-Gage Method. USA, ASTM, ASTM E837 - 13a.
- G. S. Schajer, (2013). Practical Residual Stress Measurement Methods. USA, John Wiley & Sons, Ltd.
- ASTM (1986). Standard Method for Verifying the Alignment of X-ray Diffraction Instrumentation for Residual Stress Measurement. USA, ASTM. ASTM E915, Vol.3.01.
- P. S Prevéy (1986). "The Use of Pearson VII Distribution Functions in X-Ray Diffraction Residual Stress Measurement." Advanced in X-Ray Analysis 29: 103-112.
- P. S. Prevéy (1977). "A Method of Determining the Elastic Properties of Alloys in Selected Crystallographic Directions for X-ray Diffraction Residual Stress Measurement." Advanced in X-Ray Analysis 20: 103-112.
- Nair and C. S. Cai (2010). "Acoustic emission monitoring of bridges: Review and case studies " Engineering Structures 32(6): 1704-1714
- B.C. Morgan and R. Tilley (1999). "Inspection of power plant headers utilizing acoustic emission monitoring." NDT & E International 32(3): 167-175.
- M. F., Shehadeh, et al. (2010). “Buckling detection within subsea pipeline laying using Acoustic Emission Technique”. 29th European Conference on Acoustic Emission Testing (EWGAE), Vienna, Austria.
- M. F., Shehadeh, et al. (2010). “Pipeline bending detection using Acoustic Emission system”. 17th International congress on sound and vibration (ICSV), 17th International congress on sound and vibration (ICSV).
- A.G. Evans and M. Linzer (1973). "Failure Prediction in Structural Ceramics Using Acoustic Emission " Journal of the American Ceramic Society 56(11): 575-581.
- H.K.Tönshoff, e. a. (2000). " Using acoustic emission signals for monitoring of production processes." Ultrasonics 37(10): 681-686.
- British standard (2004). “Hot rolled products of structural steels- Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels”. UK, BS EN 10025-4:2004.
- Mistras Group, (2009). AEwin Software User's Manual Rev 3, Mistras Group Inc. New Jersey, USA.
- L. Gannon, et al. (2010). “Effect of welding sequence on residual stress and distortion in flat-bar stiffened plates” Marine Structures 23(3): 385–404.
88 Page Views
0 PDF Downloads
0 Facebook Shares