Interevent acoustic emission character of three-point-bending tests on concrete beams by the nearest neighbor distance

Ren, Darui; Liu, Baoguo; Sun, Jinglai; Song, Yu; Lin, Zhiyun; Liu, Bo‐Kai

doi:10.1016/j.conbuildmat.2019.07.070

Cited by 12 publications

(2 citation statements)

References 44 publications

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“…Unlike the DIC, which can only monitor cracks on the material surface, AE is able to identify not only the type of damage 23 but also to precisely locate the damage inside the material. 24,25 Damage monitoring by AE techniques also proves the presence of a large number of microfractures at the crack tip. 26 Therefore, the expansion of cracks in the material is the development of microcracks to macro cracks, while the presence of microcracks at the crack tip affects the expansion of macro cracks.…”

Section: Introductionmentioning

confidence: 96%

“…All of the above studies show that the DIC technique has sufficient accuracy for accurate measurement of small changes in cracks. Unlike the DIC, which can only monitor cracks on the material surface, AE is able to identify not only the type of damage 23 but also to precisely locate the damage inside the material 24,25 . Damage monitoring by AE techniques also proves the presence of a large number of microfractures at the crack tip 26 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of interface roughness on fracture energy and fracture process zone of rock‐concrete specimens

Guo

Chen

Liu

et al. 2022

Fatigue Fract Eng Mat Struct

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To investigate the effect of interface roughness on the fracture behaviors of rock‐concrete specimens, the acoustic emission (AE) and digital image correlation (DIC) techniques are used to monitor the fracture process of the granite‐concrete specimens with different interfacial roughnesses under three‐point bending (TPB) load. The initial fracture toughness of rock‐concrete specimens with different interfacial roughnesses is calculated. The characteristic parameters of the AE are also discussed. Based on the fracture mechanics theory, the transient critical response equation and the stress‐crack opening displacement model for the rock‐concrete interface crack opening displacement (COD) based on micro–macro crack interactions are established. The determination of the model parameters is achieved by the DIC technique, and the fracture energies of interfaces with different roughnesses are calculated based on the model with the determined parameters. The validity of the model is verified by comparing the calculation results with those from the existing fracture energy calculation methods.

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