Influence of Loading Conditions during Tensile Testing on Acoustic Emission


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The Acoustic Emission (AE) monitoring technique is widely used in mechanical and material research for detection of plastic deformation, fracture initiation and crack growth. However, the influence of AE features (such as signal amplitude, frequency, rise time and duration) on the fracture parameters (such as brittle or ductile mode of propagation and fracture propagation speed) is not completely understood. In this paper, the effect of loading conditions on fracture behavior was studied using AE monitoring during tensile testing of an aluminum alloy specimen. The fracture development was observed using a high speed video camera and was analyzed using the finite element method. The hardware and software produced by Physical Acoustics Corporation (USA) was used. Variations in AE parameters were analyzed and correlated to the stress-strain curves obtained during testing. It is shown that the strain rate and the presence of a crack (modeled by a notch on the sample), affect the fracture mode (brittle or ductile) and a relative amount of the mode dependent AE signatures.



Edited by:

Yeong-Maw Hwang and Cho-Pei Jiang




T. Chuluunbat et al., "Influence of Loading Conditions during Tensile Testing on Acoustic Emission", Key Engineering Materials, Vol. 626, pp. 121-126, 2015

Online since:

August 2014




* - Corresponding Author

[1] C.U. Grosse, M. Ohtsu, Acoustic emission testing, Springer, Heidelburg, (2008).

[2] B. Muravin, M.F. Carlos, Guide for development of acoustic emission application for examination of metal structure, J. Acoustic Emission. 29 (2011) 142-148.

[3] A.G. Kostryzhev, C.L. Davis, C. Roberts, Detection of crack growth in rail steel using acoustic emission, Ironmaking and Steelmaking. (2012) 1-6.


[4] H.N.G. Wadley, C. B Scruby, J.H. Speakes, Acoustic emission for physical examination of metals, International Metals Reviews. 2 (1980) 41-64.


[5] C.K. Mukhopadhyay, K.V. Rajkumar, T. Jayakumar, B. Raj, Study of tensile deformation behaviour of M250 grade maraging steel using acoustic emission. J. Mater. Sci. 45 (2010) 1371-1384.


[6] C.K. Mukhopadhyay, T. Jayakumar, B. Raj, K.K. Ray, The Influence of notch on the acoustic emission generated during tensile testing of nuclear grade AISI type 304 stainless steel, J. Mater. Sci and Eng. 276 (2000) 83-90.


[7] F.F. Barsoum, J. Suleman, A. Korcak, E.V.K. Hill, Acoustic emission monitoring and fatigue life prediction in axially loaded notched steel specimens.

[8] K. Ono, Current understanding of mechanisms of acoustic emission, J. Strain Analysis. 40 (2005) 1-15.

[9] H. Roy, N. Parida, S. Sivaprasad, S. Tarafder, K. K Ray, Acoustic emissions during fracture toughness tests of steel exhibiting varying ductility, J. Mater. Sci and Eng, 486 (2008) 562-571.


[10] Z. Kral, W. Horn, J. Steck, Crack propagation analysis using acoustic emission sensors for structural health monitoring system, The Scientific World Journal, 2013 (2013) 1-13.


[11] Z. Han, H. Lou, H. Wang, Effect of strain rate and notch on acoustic emission during the tensile deformation of a discontinuous yielding material, J. Mater Sci and Eng. 528 (2011) 4372-4380.


[12] A.L. Gurson, Continuum theory of ductile rupture by void nucleation and growth: part 1- yield criteria and flow rules for porous ductile media, J. Eng Mater. Tech. 99 (1977) 2-15.


[13] V. Tvergaard, A. Needleman, Analysis of the cup-cone fracture in a round tensile bar, Acta Metallurgica, 32 (1984) 157-169.


[14] B. Chen, X. Peng, J. Fan, S. Chen, Constitutive relation of casting aluminium alloy involving void evolution, J. Mater. Transactions. 46 (2005) 2997-3000.