Damage analysis of FRP/steel composite plates using acoustic emission

Chen, Zhi; Li, Dongsheng; Li, Yunyu; Feng, Quanming

doi:10.1016/j.pscr.2015.03.002

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…To complete this unsupervised pattern recognition approach, a global variable was used to focus on the relationship between the AE activity and the mechanical behaviour of the specimen. The Sentry Function (SF) was chosen because it combines both mechanical and acoustic energy information [31][32][33]. This function is defined by:…”

Section: Ae Data Processingmentioning

confidence: 99%

Mechanical behaviour and damage mechanisms analysis of a flax-fibre reinforced composite by acoustic emission

Monti

Mahi

Jendli³

et al. 2016

Composites Part A: Applied Science and Manufacturing

139

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This article presents the mechanical characterization of an eco composite consisting of a thermoplastic matrix reinforced by flax fibres. Different configurations of specimens were tested with uniaxial tensile loading and their mechanical behaviours were discussed. Moreover, the acoustic emission technique was used to detect the appearance of damage mechanisms and to follow their evolution. In addition, a list of these mechanisms was established by means of macroscopic and microscopic observations. The acoustic emission records were post processed by the k-means unsupervised pattern recognition algorithm. Depending on the specimen configuration, three or four classes of events were obtained. The acoustic characteristics of these classes were compared. Then, a correlation between these AE events classes and the damage mechanisms observed was proposed. Their effects on the mechanical behaviour of the material were investigated by means of a variable called the Sentry Function.

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Section: Ae Data Processingmentioning

confidence: 99%

Mechanical behaviour and damage mechanisms analysis of a flax-fibre reinforced composite by acoustic emission

Monti

Mahi

Jendli³

et al. 2016

Composites Part A: Applied Science and Manufacturing

139

View full text Add to dashboard Cite

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“…An index of damage (ID) was proposed to correlate the cumulative AE energy and plastic strain energy of specimens [16]. Abdelrahman [17] and Chen [18] later proposed a modified ID (MID) to guarantee the practical application of this index. Vidya [11] and Ohtsu [19] examined the feasibility of the NDIS-2421 criteria by testing reinforced concrete beams damaged under cyclic loading.…”

Section: Introductionmentioning

confidence: 99%

Damage evaluation of fiber reinforced plastic-confined circular concrete-filled steel tubular columns under cyclic loading using the acoustic emission technique

2017

Smart Mater. Struct.

Self Cite

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Glass-fiber reinforced plastic (GFRP)-confined circular concrete-filled steel tubular (CCFT) columns comprise of concrete, steel, and GFRP and show complex failure mechanics under cyclic loading. This paper investigated the failure mechanism and damage evolution of GFRP–CCFT columns by performing uniaxial cyclic loading tests that were monitored using the acoustic emission (AE) technique. Characteristic AE parameters were obtained during the damage evolution of GFRP–CCFT columns. Based on the relationship between the loading curve and these parameters, the damage evolution of GFRP–CCFT columns was classified into three stages that represented different damage degrees. Damage evolution and failure mode were investigated by analyzing the b-value and the ratio of rise time to waveform amplitude and average frequency. The damage severity of GFRP–CCFT columns were quantitatively estimated according to the modified index of damage and NDIS-2421 damage assessment criteria corresponding to each loading step. The proposed method can explain the damage evolution and failure mechanism for GFRP–CCFT columns and provide critical warning information for composite structures.

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“…Subscripts T and ts represent total time and time required for steel yielding.

D I = \frac{A E E_{T}}{A E E_{t s}} .

This method is later revised, where AEE ts is considered at the halfway point of yielding of specimens for damage analysis of FRP/steel composite plates 53 . In the present study, this damage index is modified (MDI) to be the ratio of AEE T and cumulative AEE at any instant time ( t ) and given in Equation (6).…”

Section: Resultsmentioning

confidence: 99%

Smart monitoring of strengthened beams made of ultrahigh performance concrete using integrated and nonintegrated acoustic emission approach

Prem

Verma

Murthy

et al. 2021

Struct Control Health Monit

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Summary Ultrahigh performance concrete (UHPC) is one of the recent advancements in construction building materials and popularly used as a precast applications or strengthening material. The current paper attempts to improve understanding about fracture and failure mechanisms of UHPC application as a strengthening material using acoustic emission (AE) technique. The paper proposes an integrated and nonintegrated approach to relate the mechanical energy with AE energy for (i) undamaged reinforced concrete (RC) beams and (ii) damaged RC beams strengthened with UHPC. The integrated approach evaluates the damage mechanisms by evaluating sentry function (logarithmic ratio of mechanical and acoustic energy), while nonintegrated approach considers superimposition of flexure and AE response, load versus AE energy behavior and damage index. To validate the proposed approach, experiments are conducted on (i) control RC beams and (ii) RC beams strengthened with UHPC layers of t, 1.5t, and 2t thickness (where t = 10 mm). From the study, it is found that analysis of structures using both the approaches can overcome corresponding limitations. Hence, to completely characterize the damage, both methods are recommended.

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Damage analysis of FRP/steel composite plates using acoustic emission

Cited by 7 publications

References 18 publications

Mechanical behaviour and damage mechanisms analysis of a flax-fibre reinforced composite by acoustic emission

Mechanical behaviour and damage mechanisms analysis of a flax-fibre reinforced composite by acoustic emission

Damage evaluation of fiber reinforced plastic-confined circular concrete-filled steel tubular columns under cyclic loading using the acoustic emission technique

Smart monitoring of strengthened beams made of ultrahigh performance concrete using integrated and nonintegrated acoustic emission approach

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