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Austin Downey  - - - 
Top co-authors See all
Luigi Torre

185 shared publications

Materials Engineering Center, University of Perugia, Località Pentima Bassa, 21, 05100 Terni, Italy;(R.P.);(F.D.);(L.T.)

Simon Laflamme

121 shared publications

Department of Civil, Construction and Environmental Engineering, Iowa State University, 813 Bissell Road, Ames, IA 50011, USA

Filippo Ubertini

112 shared publications

Department of Civil and Environmental Engineering, University of Perugia, 06125 Perugia, Italy

Antonella D’Alessandro

49 shared publications

Department of Civil and Environmental Engineering, Via G. Duranti 93, 06125 Perugia, Italy

Enrique García-Macías

28 shared publications

Department of Civil and Environmental EngineeringUniversity of PerugiaVia G Duranti 93 Perugia 06125 Italy

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Publication Record
Distribution of Articles published per year 
(2015 - 2019)
Total number of journals
published in
 
26
 
Publications See all
Article 0 Reads 0 Citations Concrete Crack Detection and Monitoring Using a Capacitive Dense Sensor Array Jin Yan, Austin Downey, Alessandro Cancelli, Simon Laflamme,... Published: 18 April 2019
Sensors, doi: 10.3390/s19081843
DOI See at publisher website ABS Show/hide abstract
Cracks in concrete structures can be indicators of important damage and may significantly affect durability. Their timely identification can be used to ensure structural safety and guide on-time maintenance operations. Structural health monitoring solutions, such as strain gauges and fiber optics systems, have been proposed for the automatic monitoring of such cracks. However, these solutions become economically difficult to deploy when the surface under investigation is very large. This paper proposes to leverage a novel sensing skin for monitoring cracks in concrete structures. This sensing skin is constituted of a flexible electronic termed soft elastomeric capacitor, which detects a change in strain through changes in measured capacitance. The SEC is a low-cost, durable, and robust sensing technology that has previously been studied for the monitoring of fatigue cracks in steel components. In this study, the sensing skin is introduced and preliminary validation results on a small-scale reinforced concrete beam are presented. The technology is verified on a full-scale post-tensioned concrete beam. Results show that the sensing skin is capable of detecting, localizing, and quantifying cracks that formed in both the reinforced and post-tensioned concrete specimens.
Article 0 Reads 1 Citation Physics-based prognostics of lithium-ion battery using non-linear least squares with dynamic bounds Austin Downey, Yu-Hui Lui, Chao Hu, Simon Laflamme, Shan Hu Published: 01 February 2019
Reliability Engineering & System Safety, doi: 10.1016/j.ress.2018.09.018
DOI See at publisher website
Article 1 Read 0 Citations Use of flexible sensor to characterize biomechanics of canine skin Austin R. J. Downey, Jin Yan, Eric M. Zellner, Karl H. Kraus... Published: 25 January 2019
BMC Veterinary Research, doi: 10.1186/s12917-018-1755-y
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Suture materials and techniques are frequently evaluated in ex vivo studies by comparing tensile strengths. However, the direct measurement techniques to obtain the tensile forces in canine skin are not available, and, therefore, the conditions suture lines undergo is unknown. A soft elastomeric capacitor is used to monitor deformation in the skin over time by sensing strain. This sensor was applied to a sample of canine skin to evaluate its capacity to sense strain in the sample while loaded in a dynamic material testing machine. The measured strain of the sensor was compared with the strain measured by the dynamic testing machine. The sample of skin was evaluated with and without the sensor adhered. In this study, the soft elastomeric capacitor was able to measure strain and a correlation was made to stress using a modified Kelvin-Voigt model for the canine skin sample. The sensor significantly increases the stiffness of canine skin when applied which required the derivation of mechanical models for interpretation of the results. Flexible sensors can be applied to canine skin to investigate the inherent biomechanical properties. These sensors need to be lightweight and highly elastic to avoid interference with the stress across a suture line. The sensor studied here serves as a prototype for future sensor development and has demonstrated that a lightweight highly elastic sensor is needed to decrease the effect on the sensor/skin construct. Further studies are required for biomechanical characterization of canine skin. The online version of this article (10.1186/s12917-018-1755-y) contains supplementary material, which is available to authorized users.
Article 0 Reads 0 Citations Incipient Damage Detection for Large Area Structures Monitored With a Network of Soft Elastomeric Capacitors Using Relat... Austin Downey, MohammadKazem Sadoughi, Simon Laflamme, Chao ... Published: 01 November 2018
IEEE Sensors Journal, doi: 10.1109/jsen.2018.2868135
DOI See at publisher website
Article 1 Read 1 Citation Reconstruction of unidirectional strain maps via iterative signal fusion for mesoscale structures monitored by a sensing... MohammadKazem Sadoughi, Austin Downey, Jin Yan, Chao Hu, Sim... Published: 01 November 2018
Mechanical Systems and Signal Processing, doi: 10.1016/j.ymssp.2018.04.023
DOI See at publisher website
PROCEEDINGS-ARTICLE 1 Read 0 Citations Passive Variable Friction Damper for Increased Structural Resilience to Multi-Hazard Excitations Austin Downey, MohammadKazem Sadoughi, Liang Cao, Simon Lafl... Published: 26 August 2018
Volume 2A: 44th Design Automation Conference, doi: 10.1115/detc2018-85207
DOI See at publisher website
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