Comparative Study of Acoustic Emission and Scanning Electron Microscope to Evaluate Fracture Process Zone in Concrete Beams

Hadjab, Hadda; Thimus, Jean-François; Chabaat, Mohamed

doi:10.1061/(asce)mt.1943-5533.0000121

Cited by 10 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the important role of FPZ during fracture process in concrete, it is significant to be able to measure the size of the FPZ and on this basis to investigate the role of the FPZ in the size dependence of fracture parameters. Recently various measurement techniques are already employed to track the fracture process in concrete experimentally, for example the holographic interferometry method [8], the scanning electron microscopy method [9,10], acoustic emission (AE) techniques [11] and digital image correction (DIC) method [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Mesoscopic investigation of size effect in notched concrete beams: The role of fracture process zone

Zhou

Chen

2019

Engineering Fracture Mechanics

View full text Add to dashboard Cite

A comprehensive mesoscopic investigation has been conducted into the classic topic of size effect, using notched plain concrete beams subjected to three-point bending as a test bed. The concrete beams are modelled as random heterogeneous material containing three components, coarse aggregates, mortar and the interface transition zone. Mesoscopic numerical simulations using a 2D mesoscale continuum damage-based model, enhanced by a nonlocal treatment, is used to capture the whole fracture process in concrete materials. Both global and local numerical results are then examined and verified with relevant experimental evidence from the literature. A stress field interaction theory based on the strip yield model is proposed to interpret the size effect phenomenon and the role of detailed fracture process zone features is discussed accordingly.

show abstract

Section: Introductionmentioning

confidence: 99%

Mesoscopic investigation of size effect in notched concrete beams: The role of fracture process zone

Zhou

Chen

2019

Engineering Fracture Mechanics

View full text Add to dashboard Cite

show abstract

“…In addition, it has the advantages of rich types of measurable samples, almost no damage and pollution to the original sample, and simultaneous acquisition of morphology, structure, composition, and crystallographic information, etc. [5][6][7][8]. At present, SEM has been widely used in the microscopic research of materials science, such as fracture analysis, microstructure morphology, and nanomaterial analysis.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Crack Detection Approach for Scanning Electron Microscope Image Using Deep Learning Method

et al. 2021

View full text Add to dashboard Cite

The scanning electron microscope (SEM) is widely used in the analysis and research of materials, including fracture analysis, microstructure morphology, and nanomaterial analysis. With the rapid development of materials science and computer vision technology, the level of detection technology is constantly improving. In this paper, the deep learning method is used to intelligently identify microcracks in the microscopic morphology of SEM image. A deep learning model based on image level is selected to reduce the interference of other complex microscopic topography, and a detection method with dense continuous bounding boxes suitable for SEM images is proposed. The dense and continuous bounding boxes were used to obtain the local features of the cracks and rotating the bounding boxes to reduce the feature differences between the bounding boxes. Finally, the bounding boxes with filled regression were used to highlight the microcrack detection effect. The results show that the detection accuracy of our approach reached 71.12%, and the highest mIOU reached 64.13%. Also, microcracks in different magnifications and in different backgrounds were detected successfully.

show abstract

“…The fracture process zone (PFZ) is one of the most popular topics when it comes to the fields of concrete fracture mechanics. Concrete can be classified as quasi-brittle materials which is the same as ceramics, rocks, some polymers, mortar and wood [4]. It can also be considered as a heterogeneous and multiphase materials [4].…”

Section: Introductionmentioning

confidence: 99%

“…Concrete can be classified as quasi-brittle materials which is the same as ceramics, rocks, some polymers, mortar and wood [4]. It can also be considered as a heterogeneous and multiphase materials [4]. According to W. Shuhong et.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 shows the concept of fracture process zone [6]. The fracture process zone normally depending upon material's microstructure, the rate of loading, size of specimens and other parameters [4]. Therefore, the experimental investigation was carried out to determine the fracture process zone and normally most of the researchers were tested under three point bending on notched specimens.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Applications of Acoustic Emission Technique Associated with the Fracture Process Zone in Concrete Beam – A Review

Basri

Bunnori

Kudus

et al. 2012

AMR

View full text Add to dashboard Cite

This paper summarized the recent development within the application of acoustic emission technique in the formation of fracture process zone and the AE energy released during the fracture process in concrete beam specimens. AE technique is a non destructive technique which is a useful tool to study the energy released during the different failure mechanisms in different types of materials and fracture process is one of the failure mechanisms in concrete. Most of the researchers were applied three point bending test on plain concrete in order to determine the facture process zone of the concrete and some of them were used numerical modeling to verify their results. The results between AE data and experimental in different parameters such as specimens size and aggregate size are normally compared. As a conclusion, AE technique is a very useful tool to determine the fracture process zone in concrete.

show abstract

Comparative Study of Acoustic Emission and Scanning Electron Microscope to Evaluate Fracture Process Zone in Concrete Beams

Cited by 10 publications

References 13 publications

Mesoscopic investigation of size effect in notched concrete beams: The role of fracture process zone

Mesoscopic investigation of size effect in notched concrete beams: The role of fracture process zone

A Hybrid Crack Detection Approach for Scanning Electron Microscope Image Using Deep Learning Method

Applications of Acoustic Emission Technique Associated with the Fracture Process Zone in Concrete Beam – A Review

Contact Info

Product

Resources

About