Acoustic emission behaviors and damage mechanisms of adhesively bonded single-lap composite joints with adhesive defects

Zhou, Wei; Liu, Ran; Lv, Zhi-hui; Chen, Weiye; Li, Xiaotong

doi:10.1177/0731684414563112

Cited by 24 publications

(9 citation statements)

References 28 publications

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“…1 In recent years, the use of metal-to-composite adhesive joints has expanded in maritime industries as well. As the application of adhesive joints possesses many desirable mechanical properties such as high strength to weight ratio, 2 good fatigue resistance properties, 3 high toughness and low-stress concentration 4 etcetera, they received significant attention of shipbuilding industries in the last few decades. 5 However, the integrity and damage mechanisms of adhesive joints are significant issues in naval industries, 4 and depend on specific parameters like service conditions, production of joint, 6,7 thickness of adherend and adhesive 8,9 and environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Deformation and damage evolution of a full-scale adhesive joint between a steel bracket and a sandwich panel for naval application

Jaiswal

Kumar

Saeedifar

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The increasing interest for the application of adhesive joints in naval superstructures motivates researchers to gain an in-depth understanding of the mechanical behaviour and failure mechanisms of these joints. This work reports on an experimental study of the deformation behaviour and damage evolution of a full-scale multi-material joint using different instrumentation techniques. Adhesively bonded joints of steel to sandwich panel components have been subjected to quasi-static tensile tests during which the global deformation of the joint and local strain distributions were monitored using digital image correlation (DIC). During one particular tensile test, fibre optic Bragg sensors (FBG) were also applied to the specimen’s surface at different locations in order to quantify the evolution of local strains. Additionally, acoustic emission (AE) sensors were installed in order to monitor damage initiation and evolution with increasing levels of imposed deformation. This test showcased adhesive failure at the interface of the steel adherend and the adhesive, while cohesive failure was observed within the adhesive and skin failure at the interface between adhesive and the composite skin of the sandwich panel. The post-mortem observed failures modes were compared to the acoustic events that originated during the test due to damage initiation and propagation within the joint. The evolution of the different sensor signals, i.e. the damage expressed as cumulative AE energy and local strains measured with Bragg sensors and DIC, are mutually compared and acceptable correlation is found.

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Section: Introductionmentioning

confidence: 99%

Deformation and damage evolution of a full-scale adhesive joint between a steel bracket and a sandwich panel for naval application

Jaiswal

Kumar

Saeedifar

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…As a dynamic Non-destructive technique, AE has been widely used to monitor the damage of composites. 17,18 Sobhani et al. 19 used AE to study the damage mechanism of composite laminates subjected to buckling and post-buckling behavior.…”

Section: Introductionmentioning

confidence: 99%

Flexural progressive damage and failure behavior of carbon-aramid/epoxy hybrid woven composites

Yin

Zhou

Zhang

et al. 2020

Journal of Composite Materials

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Two kinds of carbon aramid/epoxy hybrid woven composite specimens with different fiber orientations were prepared. The progressive flexural damage behaviors of the composites were studied. The failure process was monitored in real time by acoustic emission during the test, and the characteristics of the acoustic emission signals originating from the damage were deeply studied. In addition, the internal damage initiation/evolution and failure mechanisms were characterized by X-ray micro-computed tomography. The results show that composite specimens exhibit higher strength and obvious quasi-brittle damage behavior when carbon fiber orients along the loading direction, and the macroscopic failure is mainly shear fracture, which propagates in the direction of thickness, and the damage is dominantly distributed above the neutral plane of specimen. When aramid fiber orients along the loading direction, composite specimens show high ductility and the failure modes are mainly ply fracture at the bottom, delamination (inter-ply delamination and intra-ply delamination) and tensile fracture of the tows. The combination of acoustic emission and X-ray micro-computed tomography analysis provides an insight for further elucidation of the progressive damage initiation/evolution and failure mechanism of composites.

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“…With the development of Adhesive bonding technology in various industrial fields [1][2][3][4][5][6][7], progressive failure behaviors of composite adhesive joints begin to gain more attention. For Adhesive bonding technology, dissimilar materials can be joined in adhesive bonds to obtain connection structures with higher toughness, lighter weight and less stress concentration than traditional mechanical connections (rivet, bolt, weld, etc).…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission response and progressive failure behaviors of composite adhesively bonded joints loaded by Mode I and II

Liu

Shen

Zhang

et al. 2019

Mater. Res. Express

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The analysis of progressive failure process is one of the critical issues in the research of composite adhesive joints. In view of this point, acoustic emission (AE) is applied to real-time monitoring of the dynamic damage process of composite adhesive joints in some loading modes such as Mode I (double cantilever beam (DCB)) and Mode II (end notch flexures (ENF)). Furthermore, the high speed camera and scanning electron microscopy are carried to analyses the damage mechanisms of composite bonded joints. Results show that there are significant differences in the load-deflection curves of the specimens under the loads of Mode I and II. The main failure mode of the two types of loading modes is adhesion failure, and the accumulation of damage observed at the edge of the adhesively bonded layer cause defeat of the composite bonded joints. In addition, AE parameters including amplitude, hits, energy, and duration are connected with the fail mechanism. Furthermore, the dynamic characteristics of the AE signal, especially amplitude spectrum distribution, can provide evidences for studying progressive failure behaviors of composite adhesive joints.

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Acoustic emission behaviors and damage mechanisms of adhesively bonded single-lap composite joints with adhesive defects

Cited by 24 publications

References 28 publications

Deformation and damage evolution of a full-scale adhesive joint between a steel bracket and a sandwich panel for naval application

Deformation and damage evolution of a full-scale adhesive joint between a steel bracket and a sandwich panel for naval application

Flexural progressive damage and failure behavior of carbon-aramid/epoxy hybrid woven composites

Acoustic emission response and progressive failure behaviors of composite adhesively bonded joints loaded by Mode I and II

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