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Takahiro Omori, Takashi Usui, Kazuo Watabe, Minh-Dung Nguyen, Kiyoshi Matsumoto and Isao Shimoyama
In recent years, with the continuing progress of aging social infrastructures such as bridges and tunnels, there has been high demand for the assessment of deterioration of their performance and conditions. Since current inspection methods for those stru...
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Alexander Lange, Ronghua Xu, Max Kaeding, Steffen Marx and Joern Ostermann
Regular inspections of important civil infrastructures are mandatory to ensure structural safety and reliability. Until today, these inspections are primarily conducted manually, which has several deficiencies. In context of prestressed concrete structur...
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Yadong Zheng, Lianying Zhang, Peng Wu, Xiaoqian Guo, Ming Li and Fuqiang Zhu
The physical and mechanical properties of rocks change significantly after being subjected to high temperatures, which poses safety hazards to underground projects such as coal underground gasification. In order to investigate the effect of temperature o...
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Yangbing Cao, Qiang Yan, Sui Zhang and Fuming Cai
Shale is a common rock type that is associated with underground engineering projects, and several important factors, such as bedding structure, confining pressure, and the loading and unloading path, significantly influence the anisotropy of shale. Triax...
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Eugen Stockburger, Hendrik Wester and Bernd-Arno Behrens
Advanced high-strength steels (AHHS) are widely used in many production lines of car components. For efficient design of the forming processes, numerical methods are frequently applied in the automotive industry. To model the forming processes realistica...
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Zhushuai Wang, Yu Yang, Yu Xu, Changhao Xin, Pengfei Liang and Ning Guo
This paper presents two experimental schemes, graded cyclic loading and unloading, and variable lower limit cyclic loading and unloading, to investigate the energy evolution and acoustic emission characteristics of rocks under different cyclic loading an...
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Bing Sun, Haowei Yang, Junwei Fan, Xiling Liu and Sheng Zeng
In order to study the deformation and failure characteristics of rocks under different cyclic loading and unloading paths, three stress path tests were conducted, and acoustic emission (AE) monitoring was conducted simultaneously. The mechanical characte...
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Yujing Jiang, Xinpeng Li, Changsheng Wang, Hengjie Luan, Sunhao Zhang, Gang Wang and Pu Wang
Understanding the asperity damage behaviors of joints during shearing is critical for evaluating the stability of deep underground engineering structures. In this paper, we prepared plaster joints and used them for direct shear tests under different norm...
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Ci-Rong Huang and Ming-Chyuan Lu
In the development of a tool wear monitoring system in milling, the complex cutting path always brings challenges to the system?s reliability in the production line. The cutting path effect on the acoustic emission (AE) and vibration signals during the m...
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Grigore Cican, Tiberius-Florian Frigioescu, Daniel-Eugeniu Crunteanu and Laurentiu Cristea
This paper explores the implementation of an ejector to a micro turbojet engine and analysis of the advantages in terms of acoustic and thrust/fuel consumption. Starting with the analytical equations and a series of numerical simulations, the optimal eje...
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Vivian Schiller, Sandra Klaus, Ali Bilen and Gisela Lanza
The complexity of products increases considerably, and key functions can often only be realized by using high-precision components. Microgears have a particularly complex geometry and thus the manufacturing requirements often reach technological limits. ...
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Giuseppe Ciaburro, Sankar Padmanabhan, Yassine Maleh and Virginia Puyana-Romero
The modern conception of industrial production recognizes the increasingly crucial role of maintenance. Currently, maintenance is thought of as a service that aims to maintain the efficiency of equipment and systems while also taking quality, energy effi...
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Yue Kong, Weimin Chen, Ning Liu, Boqi Kang and Min Li
The knowledge of cracking mechanisms is significant for evaluating the healthy condition of aircraft structures and can be retrieved by moment tensor inversion based on the acoustic emission (AE) phenomenon. For engineering applications, the inversion me...
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Guangming Li, Zhen Zhao, Yaohan Li, Chun-Yin Li and Chi-Chung Lee
Bridges, especially cable-stayed bridges, play an important role in modern transportation systems. The safety status of bridge cables, as an important component of cable-stayed bridges, determines the health status of the entire bridge. As a non-destruct...
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Timothy Devenport, Bernard Rolfe, Michael Pereira and James M. Griffin
In this paper, the applicability of acoustic emission (AE) measurement of galling wear in sheet metal forming (SMF) is investigated.
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Kwang Bok Kim, Bong Ki Kim, Sang Guk Lee and Jun-Gill Kang
In this paper, the displacement fields responsible for acoustic emission (AE), excited from a point source in a transversely isotropic cylinder, are derived by solving the Navier-Lamé (NL) equation. The point source as an internal defect is represented b...
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Wenyu Tang, Hang Lin, Yifan Chen, Jingjing Feng and Huihua Hu
The stability of the interface between mortar and rock is very important in engineering construction. In this paper, the all-digital acoustic emission (AE) system is used to detect the direct shear test of the mortar-rock binary medium interface with dif...
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Wei He, Wenru Hao, Xia Meng, Pengchong Zhang, Xu Sun and Yinlan Shen
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Giulia Boccacci, Francesca Frasca, Chiara Bertolin and Anna Maria Siani
Among non-destructive testing (NDT) techniques applied to structural health monitoring in existing timber structures, ranging from visual inspection to more sophisticated analysis, acoustic emission (AE) is currently seldomly used to detect mechanical st...
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Mingtao Gao, Hongyu Yan, Huiqiang Duan and Si Xiong
The paper represents a test investigation of the mechanical properties and acoustic emission (AE) characteristics of low-strength coal specimens subjected to cyclic loading and unloading. From the lab tests, the following conclusions can be obtained: (1)...
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