... and error analysis of in situ stress measurement by the acoustic emission method in civil and geotechnical engineering. E-mail: zelinl@csu.edu.cn ASTM International is not responsible, as a body, for the statements and opinions expressed in this paper. ASTM International does not endorse any...

... pattern of rocks under the indentation of circular punches, indentation experiments were carried out on three sandstones using the digital image correlation (DIC) and acoustic emission (AE) simultaneous test system. A penetration force prediction model considering the radius of the indenter...

... and 2.17 J, respectively. Subsequently, the three-point bending test was conducted on the impacted specimens with acoustic emission (AE) monitoring to evaluate the residual flexural strength and failure modes. The mechanical results showed that the hybrid/epoxy composites impacted at 50°C have better...

... cyclic fracture tests were conducted. The results indicate that the failure load of FGDC increases with increasing frequency. The evolution of crack mouth opening displacement at maximum load can be divided into three stages. Acoustic emission (AE) and digital image correlation (DIC) were used...

...Dongyu Xu; Huaicheng Chen; Mei Cao; Yuli Cui; Junsheng Bai; Shoude Wang ABSTRACT Freezing and thawing behavior are among the most important factors when determining the durability of engineering structures in cold regions. A kind of acoustic emission (AE) sensor was tailored to evaluate...

..., acoustic emission and digital image correlation are used to monitor the uniaxial compression failure process of self-healing cement paste. A kind of self-healing microcapsule was prepared with sodium silicate and expanded silicate cement as main core materials, and its state in mortar matrix was observed...

... deteriorating rate. The acoustic emission (AE) technique is employed to detect the damage progression. Although the AE signals decrease with the increase of AE signals, the damage can be well represented by a relatively high emitting rate of AE signals. Furthermore, the load ratio, calm ratio, and relaxation...

...Shaofeng Wang; Lili Dong; Jianguo Wang; Hailing Wang; Guang Xu; Jun Hong This study is investigates how to reconstruct the continuous leak acoustic emission (AE) signal to precisely locate the leak source on a gas-filled steel pipe based on cross-correlation location theory. Thus, in this article...

...Amir Mostafapour; Saman Davoodi; Mohammad Ghareaghaji In this study, the acoustic emission characteristics of a rectangular plate with a partially covered free damping viscoelastic layer excited by an acoustic source (Hsu-Nielsen) has been investigated. A partially covered plate configuration...

...Wei Yao; Jin Yu; Xueying Liu; Xianqi Zhou; Yanyan Cai; Yaoliang Zhu In an attempt to study the acoustic emission (AE) characteristics of granite specimens (25°C~600°C) during high-temperature deformation, the uniaxial compression and general triaxial compression tests were carried out. The AE...

... propagation rate and the effective crack length of pervious concrete relative to flexural fatigue tests is obtained. In addition, the acoustic emission technique is used to monitor the cracking process of pervious concrete. The results indicate that the crack propagation law is similar to that of the acoustic...

..., the acoustic emission (AE) device is used to monitor and collect the AE signals in the loading process. According to the test results, no size effect exists in the accumulation of residual deformation, but the degradation of the unloading modulus is related to the specimen diameter. Meanwhile, the Kaiser...

...Z. Sun; B. Behnia; W. G. Buttlar; H. Reis An acoustic emission (AE)-based approach to evaluate low-temperature cracking susceptibility of both asphalt binders and asphalt mixtures is presented. The AE binder testing approach consists of a thin film of asphalt binder bonded to a granite substrate...

...R. Vidya Sagar; M. V. M. S. Rao Acoustic emissions (AE) released during the flexure tests of reinforced concrete (RC) beams under incremental cyclic loading conditions in the laboratory were subjected to improved b -value ( Ib -value) analysis. Ib -value has been reported to be useful to detect...

... examining the acoustic emission (AE) characteristics of the complete limestone failure process have been carried out under uniaxial compression. The experimental results, including accumulative AE counts, the curve of stress and strain, AE rate and stress-time, AE energy rate and stress-time, AE amplitude...

...V. Arumugam; C. Suresh Kumar; C. Santulli; F. Sarasini; A. Joseph Stanley The various failure mechanisms in bidirectional glass/epoxy laminates loaded in tension are identified using acoustic emission (AE) analysis. AE data recorded during the tensile testing of a single layer specimen are used...

... rates were performed at three low temperatures for ten mixtures. An acoustic emission (AE) system with eight recording channels was used to monitor the development of micro cracking in the specimens for both tests for one mixture. The experimental results show that test temperature has a significant...

...K Sato; H Omura; T Hashida; K Yashiro; H Yugami; T Kawada; J Mizusaki A simple mechanical damage testing method, combined with Acoustic Emission (AE) monitoring was developed in order to investigate the mechanical performance of solid oxide fuel cells under simulated environments. The damage...

...P Chen; PSK Chua; GH Lim This paper studies experimentally acoustic emission (AE) to monitor internal leakage in modern water hydraulic cylinders. A series of experiments has been designed and carried out. Through these experiments, the background noise induced by the operation of a water hydraulic...

...EC Fatzinger, Jr; EVK Hill Acoustic emission (AE) nondestructive testing was used to monitor fiberglass/epoxy I-beams. The experiment consisted of loading the I-beams in cantilever fashion with a hydraulic ram. While testing, AE waveforms were collected from the onset of loading to failure. After...