Fracture of Fiber-Metal Laminate GLARE 2

Bussiba, A.; Kupiec, M.; Ifergane, S.

doi:10.1007/978-1-4615-4293-3_20

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Here, fatigue pre-cracked compact tension specimens (CTS) were tested longitudinally (LO) and transversely (TO). More experimental details are reported elsewhere [16].…”

Section: Methodsmentioning

confidence: 99%

Damage evolution and fracture events sequence in various composites by acoustic emission technique

Bussiba¹,

Kupiec²,

Ifergane³

et al. 2007

Composites Science and Technology

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Three composites materials, Glare 2 fiber metal laminates, graphite/epoxy (Gr/Ep) and carbon/carbon (C/C) have been tested mechanically under quasi-static loading in uniaxial and bending modes using uniform and notched specimens. Acoustic emission (AE) technique was utilized in tracking the damage accumulation profile during loading up to fracture in terms of AE counts rate and cumulative. In addition wavelet transforms was used to process AE signals in order to obtain both frequencies and time information on the main failure mechanism and the sequential events during fracture process. This was supported by light and electron microscopies characterizations. The mechanical and acoustical responses were examined with respect to orientation and temperature effects for the Glare 2, exposure temperature effect for the Gr/Ep and porosity degree effect for the C/C. Manifestly, the AE results demonstrate different damage build-up profiles and point to a transition in failure micro-mechanisms with respect to the influence of each parameter (temperature, orientation, and density) on the specific composite tested. For the Gr/Ep, the wavelet transforms indicate the sequence of events in the fracture process, from fiber breaks followed by debonding and ending with matrix cracking. In some cases, it has been observed that the damage accumulation profile in terms of AE resembled the dependency of the crack density versus the strain predicted by a micro-mechanical damage model.

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“…Here, fatigue pre-cracked compact tension specimens (CTS) were tested longitudinally (LO) and transversely (TO). More experimental details are reported elsewhere [16].…”

Section: Methodsmentioning

confidence: 99%

Damage evolution and fracture events sequence in various composites by acoustic emission technique

Bussiba¹,

Kupiec²,

Ifergane³

et al. 2007

Composites Science and Technology

View full text Add to dashboard Cite

show abstract

“…The source is directly related to the deformation and fracture. Since the AE was firstly found by Kaiser in 1950s, the AE has been widely applied in engineering applications for internal defects and crack initiation, 16,17) fatigue life, 18,19) fracture location, 20,21) damage characterization 22,23) and evaluation the failure mechanisms and process. 24,25) In this paper, AE signals are employed to characterize three typical cases, the no notch, pre-crack and V notch specimens of 7075Al under TPB.…”

Section: Introductionmentioning

confidence: 99%

An <i>In Situ</i> Three-Point Bending Study on Pre-Notch 7075 Aluminium Alloy with Acoustic Emission

et al. 2015

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Some types of congenital and machining-induced defects remain in a material, such as cracks and crack notches generated in a series of machining processes. Such structural defects will probably lead a reduction in the material's service life, and even a huge accident. It is important to investigate the influence of crack initiation, crack growth and crack failure in relation to the downgrading and failure of materials. We have employed the acoustic emission (AE) signal to identify the 7075 Aluminium alloy (7075 Al) crack initiation and crack growth unilateral precrack, bilateral pre-cracks, unilateral V notch and bilateral V notches under three-point bending (TPB) conditions. At the same time the tip morphology of notch specimens is obtained by the opto-digital microscope. Comparing the in situ images with the AE signals, the results indicate that the AE signals can effectively predict the crack initiation, crack growth and crack rapid instability during TPB test. In addition, the geometrical shape of the specimen is relative to the intensity of AE signals. The AE signal of a no notch specimen is much higher than that of other notch specimens. The intensity of the AE signal of pre-crack specimens is lower than the V notch specimens. A pre-crack specimen causes failure more easily than the V notch specimen in the process of bending. Specimens with no notch, unilateral pre-crack, bilateral pre-cracks, unilateral V notch and bilateral V notches can be characterized by the intensity of AE signals. The position of the crack can be determined by the linear position of the AE signals.

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Effect of strain rate on compressive mechanical properties of extruded Mg–8Li–1Al–1Ce alloy

Guo

Jiang

et al. 2013

Materials & Design

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Fracture of Fiber-Metal Laminate GLARE 2

Cited by 3 publications

References 5 publications

Damage evolution and fracture events sequence in various composites by acoustic emission technique

Damage evolution and fracture events sequence in various composites by acoustic emission technique

An <i>In Situ</i> Three-Point Bending Study on Pre-Notch 7075 Aluminium Alloy with Acoustic Emission

Effect of strain rate on compressive mechanical properties of extruded Mg–8Li–1Al–1Ce alloy

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