Analysis of Dynamic Tensile Process of Fiber Reinforced Concrete by Acoustic Emission Technique

Wang, Yan; Chen, Shijie; Ge, Liu; Zhou, Li; Hu, Hongxiang

doi:10.1007/s11595-018-1945-2

Cited by 16 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To explore the expansion direction and status of the internal rock cracks, the distribution law of positioning points in the AE three-dimensional location are Figs. [18][19][20][21][22] shows the failure diagram and AE 3D positioning diagram of triaxial compression of Helan mountain sandstone under different F-T cycles. It can be seen from the figure that with the increase of confining pressure, the distribution of 3D positioning points in the process of rock sample failure is concentrated and regular, and has a good corresponding relationship with the rock sample failure diagram.…”

Section: Failure Analysismentioning

confidence: 99%

“…Ultrasonic CT technology was used to detect the internal cracks [15][16][17] . Moreover, acoustic emission (AE), as a nondestructive testing, can determine the deformation characteristics and damage degree of materials under the action of external factors [18] , and is mostly used in the fields of ceramics [19] , wood [20] , rock [21] , concrete [22] , etc. AE can detect the acoustic signal produced by dislocation movement, crack propagation, fracture, temperature stress, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Mechanical Characteristics and Damage Model of Helan Mountain Rock based on Acoustic Emission

Yang

Zhao

et al. 2021

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

View full text Add to dashboard Cite

With the risk of disappearing for the rock paintings considering long-term exposure in Helan Mountain, the freeze-thaw(F-T) cycling experiments were carried out with 12-hour F-T cycling (0, 10, 20, 30, and 40 F-T cycles) under five kinds of confining pressures (5,10,20,30, and 40 MPa). The acoustic emission (AE)detect technology was used to reveal the rock fracturing characteristics during the triaxial compression test whole process. The stress-strain relation changes along with different confining pressures and F-T cycles. Peak stress and residual stress changes along with different confining pressures and damages, and the variation of axial stress-AE ringing counts-time changes along with different confining pressures and F-T cycles. The damage variable with AE parameter under F-T and force coupling was defined for the first time, and the damages model was established. The experimental results show that the F-T cycles lead to the decrease of rock strength and the gradual transformation of compression failure mode from brittleness to plasticity. The confining pressure provides a certain ability to resist deformation and inhibit crack growth for rock samples after F-T cycles. The temporal and spatial evolution law of AE counts well corresponds to the loading and failure process of the rock samples. The AE 3D positioning technology can accurately capture the development position and direction of internal cracks and pores of rock, and the failure form is conical shear failure. The established damage model has a better fittingness between the theoretical calculation results and the test results, and is reasonable to be used in the future for protection of Helan Mountain rock painting.

show abstract

Section: Failure Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Mechanical Characteristics and Damage Model of Helan Mountain Rock based on Acoustic Emission

Yang

Zhao

et al. 2021

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

View full text Add to dashboard Cite

show abstract

“…Compared with other asphalt concrete pavements, the composition of semi flexible pavement is more complex. In general, it is necessary to mix asphalt materials with cement slurry with high connectivity according to a certain proportion Wang et al (2018). The structure of semi flexible pavement material is shown in Figure 1.…”

Section: Crack Propagation Displacement Measurement Based On Digital ...mentioning

confidence: 99%

Dynamic tensile fracture test of semi flexible epoxy asphalt concrete

Fang

Guan²

2021

IJMPT

View full text Add to dashboard Cite

In order to overcome the problems of large error and high failure rate existing in the fracture test method of asphalt concrete materials, the dynamic tensile fracture test of semi flexible epoxy asphalt concrete materials was proposed. This method uses digital image technology (DIC) to measure the displacement of asphalt concrete crack propagation process, accurately capture the fracture process of asphalt concrete material crack tip, and use tensile test to evaluate the low temperature cracking performance of semi flexible pavement material. The experimental results show that when the loading wavelength is increased to 900 μs, the error of the maximum tensile stress calculation value is reduced to 7.5%. There is obvious size effect on the tensile strength of concrete. The safety risk assessment model has higher security guarantee. At the same time, the required capital investment is lower, and the test failure rate is always lower than 20%.

show abstract

“…An advantage of the AE method is the ability to examine the entire structure/element, locate any damage, and assess its threat to the integrity of the structure. AE application also brings significant economic benefits [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…Suzuki et al also used the AE technique and damage mechanisms to quantify the damage of concrete structures [ 27 ]. Wang et al studied the acoustic emission characteristics and the failure process of mortars with polypropylene fibers and concrete reinforced with steel fibers at different strain rates [ 28 ]. Their study has important value for understanding the damage development characteristics of fiber-reinforced concrete.…”

Section: Introductionmentioning

confidence: 99%

Detection of Destructive Processes and Assessment of Deformations in PP-Modified Concrete in an Air-Dry State and Exposed to Fire Temperatures Using the Acoustic Emission Method, Numerical Analysis and Digital Image Correlation

Adamczak-Bugno,

Lipiec,

Koteš

et al. 2024

Polymers

View full text Add to dashboard Cite

This article presents the results of tests carried out to assess the condition of PP-modified concrete. The tests were carried out on samples previously stored at ambient temperature and exposed to temperatures corresponding to fire conditions—300 °C, 450 °C, and 600 °C. Axial compression tests of cube-shaped samples and three-point bending of beams were carried out. During strength tests, acoustic emission (AE) signals were recorded and the force and deformation were measured. Recorded AE events were clustered using the k-means algorithm. The analysis of the test results allowed for the identification of signals characteristic of the individual stages of the material destruction process. Differences in the methods of destruction of samples stored in ambient conditions and those exposed to fire temperatures were also indicated. While loading the samples, measurements were carried out using the digital image correlation (DIC) method, which enabled the determination of displacements. Based on the results of the laboratory tests, a numerical model was developed. The results obtained using different research methods (DIC and FEM) were compared. Tomographic examinations and observations of the microstructure of the tested materials were also carried out. The analyses carried out allowed for a reliable assessment of the possibility of using the acoustic emission method to detect destructive processes and assess the technical condition of PP-modified concrete. It was confirmed that the acoustic emission method, due to differences at low load levels, can be a useful technique for assessing the condition of PP-modified concrete after exposure to fire temperatures. So far, no research directions in a similar field have been identified.

show abstract

Analysis of Dynamic Tensile Process of Fiber Reinforced Concrete by Acoustic Emission Technique

Cited by 16 publications

References 20 publications

The Mechanical Characteristics and Damage Model of Helan Mountain Rock based on Acoustic Emission

The Mechanical Characteristics and Damage Model of Helan Mountain Rock based on Acoustic Emission

Dynamic tensile fracture test of semi flexible epoxy asphalt concrete

Detection of Destructive Processes and Assessment of Deformations in PP-Modified Concrete in an Air-Dry State and Exposed to Fire Temperatures Using the Acoustic Emission Method, Numerical Analysis and Digital Image Correlation

Contact Info

Product

Resources

About