Damage monitoring in fibre reinforced mortar by combined digital image correlation and acoustic emission

Rouchier, Simon; Foray, Geneviève; Godin, Nathalie; Woloszyn, Monika; Roux, Jean-Jacques

doi:10.1016/j.conbuildmat.2012.07.106

Cited by 80 publications

(31 citation statements)

References 33 publications

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“…The metal bar/fiber reinforcement and the potential encapsulated healing agent/embedded agent network contribute to the material's heterogeneity. Still in literature the location of damage in sound specimens or structures has been detected with suitable engineering accuracy [16,17]. However, the damage development complicates the wave propagation on concrete and concrete composites [18,19], reducing the wave transmission and speed characteristics.…”

Section: Focus On the Acoustic Emission Technique: The Challenge Due mentioning

confidence: 99%

Assessment of Acoustic Emission localization accuracy on damaged and healed concrete

Tsangouri

Karaiskos

Deraemaeker

et al. 2016

Construction and Building Materials

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The accuracy of ultrasound source localization is measured on damaged and autonomously healed concrete. A piezoelectric transducer is fixed into concrete and emits high-amplitude and short-duration pulses transformed into complex stress waves as they travel through concrete (pulse transmission). Eight Acoustic Emission (AE) sensors, attached on concrete surface, locate the pulse source spatially and chronically. It is shown that the transmitter localization progressively loses its accuracy with 3D spatial error up to 15% in the presence of crack 300 µm wide. The source localization error diminishes to 3.4% as the crack autonomously heals. The study aims at developing a monitoring system that accurately senses damage and can be applied on the next generation of smart engineering concrete in order to autonomously and repeatedly repair its cracks through piping network with supply of healing agent.

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Section: Focus On the Acoustic Emission Technique: The Challenge Due mentioning

confidence: 99%

Assessment of Acoustic Emission localization accuracy on damaged and healed concrete

Tsangouri

Karaiskos

Deraemaeker

et al. 2016

Construction and Building Materials

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“…The AE energy, which is proportional to the released energy at the fracture incidents, has been used in damage characterization in similar studies [7,8]. In order to illustrate the relationship between AE results and the mechanical properties, a typical case of load and AE energy with time were plotted in Figure 4.…”

Section: A Crack Development and Classificationmentioning

confidence: 99%

Acoustic Emission Monitoring of Degradation in Plain Weave CFRP Composite Laminate

Ai¹,

Xu²,

Chen³

et al. 2015

Advances in Engineering Research

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The failure process on the plain weave CFRP composite laminate under three-point bending test was monitored by acoustic emission (AE). Failure process was divided into stage I, II, and III based on the energy distribution along with the mechanical results. Moreover, various failure modes in every stage were identified by RA-AF method. Damage evolution for each failure mode was further quantified and evaluated through b-value method. Results reveal that no damage can be observed in stage I, and the dominant failure mode in stage II is matrix cracking, while stage III, where the specimen actually fractured, failure modes such as matrix cracking, fibre breakage and delamination arise sequentially. It is shown that AE monitoring can be applied for characterizing and evaluate damage in plain weave composite laminate.

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“…Fracture positions and sizes can either come from a manual input or from experimental measurements: in a previous work, digital image correlation was used during the mechanical loading of concrete samples. This technique provides two-dimensional displacement mappings, from which crack networks could be derived following an appropriate image processing methodology [28]. The result of this procedure is the quantification of all visible cracks in the form of a distributed set of segments of known aperture.…”

Section: Flow In Fractured Porous Media 221 Fracture Integrationmentioning

confidence: 99%

“…A mixed approach is followed to this aim, using experimental measurements of crack patterns as an input for a numerical model for coupled heat and moisture flow. In a recent study [28], digital image correlation and acoustic emission monitoring were found reliable for the quantification and localisation of all scales of fissures, from micro-cracks to macroscopic fractures. A numerical code was then developed [31], that may include these measurements into a finite-element frame for the prediction of coupled heat and moisture flow.…”

Section: Introductionmentioning

confidence: 99%

Influence of concrete fracture on the rain infiltration and thermal performance of building facades

Rouchier

Woloszyn

Foray

et al. 2013

International Journal of Heat and Mass Transfer

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Postprint: Rouchier S., Woloszyn M., Foray G., Roux J.-J., 2013. Influence of concrete fracture on the rain infiltration and thermal performance of building facades, International Journal of Heat and Mass Transfer vol. 61, pp. 340-352. DOI: 10.1016/j.ijheatmasstransfer.2013.02.013 Abstract Water infiltration is known to play an important part in the degradation process of construction materials. Over time, microscopic and macroscopic cracks progressively develop under the effects of mechanical loading and sorption/desorption cycles: their influence is to be accounted for in long-term hygrothermal performance assessments of the building envelope. The present work aims at showing the potential consequences of cracking on the heat and moisture transfer across building facades, in order to justify the need for the identification of damage to prevent durability and thermal issues. Specific simulation cases of insulated and non-insulated building facades were defined, and submitted to atmospheric boundary conditions for simulation times of one month. Some of the simulation geometries included previous measurements of crack patterns in concrete. The comparison of fractured and non-fractured building facades showed the effects of cracks on the moisture accumulation and thermal performance of these wall configurations, thus giving an estimate of what these effects might be in real conditions. A methodology is thus proposed for the identification of renovation needs, which may be applied for the purpose of durability assessments as well.

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Damage monitoring in fibre reinforced mortar by combined digital image correlation and acoustic emission

Cited by 80 publications

References 33 publications

Assessment of Acoustic Emission localization accuracy on damaged and healed concrete

Assessment of Acoustic Emission localization accuracy on damaged and healed concrete

Acoustic Emission Monitoring of Degradation in Plain Weave CFRP Composite Laminate

Influence of concrete fracture on the rain infiltration and thermal performance of building facades

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