Use of acoustic emission to identify damage modes in glass fibre reinforced polyester

Statistical fracture of E-glass fibres using a bundle tensile test and acoustic emission monitoring

“…The signals assigned to the fibre breaks have higher amplitude, quick rising and decaying. This AE signature can be used to train supervised classifier in composite materials [32][33][34]. Nevertheless, in that case the AE signature of the fibre breaks in a matrix will be certainly different and new type of flaws…”

Multi scale analysis by acoustic emission of damage mechanisms in natural fibre woven fabrics/epoxy composites.

“…This technique has been widely used on carbon or glass/polyester composites [4][5], carbon or glass/epoxy composites [6][7][8] or polymer reinforced composites [9]. Moreover, some recent studies introduce AE technique to analyse the behaviour of natural fibre composites [10][11][12].…”

“…Various parameters are recorded with acoustic emission, such as amplitude, frequency, energy data or waveform parameters. Some studies use a multivariable data analysis to characterise the development of damage by acoustic emission [5,8,13]. Many of them have shown a clear correlation between acoustic emission amplitude and damage mechanisms in composite [6,14].…”

“…Thence, many authors have developed various AE experimental programs adapted to different materials. For cross-ply laminates, tensile tests on neat resin and [0]n, [45]n and [90]n unidirectional composites had been performed to characterise damage [5,9]. Subsequently, the dominant mode of damage developed in each orientation has been associated to the corresponding a e-mail : claire.bonnafous@lmpm.ensma.fr 14th International Conference on Experimental Mechanics AE event amplitude.…”

Using Acoustic Emission to Evaluate Fracture Toughness Energy Release Rate (GI) at Mode I Delamination of Composite Materials

“…Microscopic behavior of fiber matrix interface microdamage is more difficult to be investigated, although it represents a major part of the delamination process. For monitoring microscopic events, Acoustic Emission (AE) is an appropriate tool (Refahi Oskouei & Ahmadi, 2010;Ndiaye et al, 2000;R'Mili et al, 2008;Cesari et al, 2007;Huguet et al, 2002). However, the interpretation of the signals and, hence, the evaluation of the damage stages is a major problem of the AE method.…”