scholarly journals Nanotechnology and Development of Strain Sensor for Damage Detection

2019 ◽  
Author(s):  
Yumna Qureshi ◽  
Mostapha Tarfaoui ◽  
Khalil K. Lafdi ◽  
Khalid Lafdi
Keyword(s):  
Damage Detection ◽  
Strain Sensor

A strain sensor based monitoring and damage detection system for a two-span beam bridge

2018 ◽  
pp. 1627-1634
Author(s):  
P. Waibel ◽  
O. Schneider ◽  
H.B. Keller ◽  
J. Müller ◽  
O. Schneider ◽  
...  
Keyword(s):  
Damage Detection ◽  
Detection System ◽  
Strain Sensor ◽  
Beam Bridge

Static-Based Damage Detection Using Measured Strain and Deflection Data

2012 ◽  
Vol 256-259 ◽  
pp. 1097-1100
Author(s):  
Hee Chang Eun ◽  
Su Yong Park ◽  
Min Su Lee
Keyword(s):  
Damage Detection ◽  
Experimental Work ◽  
Strain Sensor ◽  
Measured Data ◽  
Baseline Data ◽  
Detection Methods ◽  
Measured Strain

This study investigates the effectiveness of the damage detection methods depending on the data measured by strain and deflection sensors. The experimental work considers the damage detection by measured data only without the baseline data of intact structure. It is shown that the strain sensor cannot indicate the damage if the sensor doesn’t locate at the damage. But the deflection sensor provides the information on the damage from the deflected curve by collected data. The results are illustrated in experimental work.

Use of optical fiber strain sensor for damage detection in composite structures

1995 ◽  
Author(s):  
Prafulla J. Masalkar ◽  
Sant K. Malhotra ◽  
Rajpal S. Sirohi ◽  
Anand K. Asundi
Keyword(s):  
Optical Fiber ◽  
Damage Detection ◽  
Composite Structures ◽  
Strain Sensor

scholarly journals Automatic Damage Detection and Monitoring of a Stitch Laminate System Using a Fiber Bragg Grating Strain Sensor

2014 ◽  
Vol 04 (01) ◽  
pp. 47-60
Author(s):  
Agus Trilaksono ◽  
Naoyuki Watanabe ◽  
Atsushi Kondo ◽  
Hikaru Hoshi ◽  
Yutaka Iwahori
Keyword(s):  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Bragg Grating

scholarly journals Real-time strain monitoring and damage detection of composites in different directions of the applied load using a microscale flexible Nylon/Ag strain sensor

2019 ◽  
Vol 19 (3) ◽  
pp. 885-901 ◽  
Author(s):  
Yumna Qureshi ◽  
Mostapha Tarfaoui ◽  
Khalil K Lafdi ◽  
Khalid Lafdi
Keyword(s):  
Damage Detection ◽  
Real Time ◽  
Electrical Response ◽  
Strain Sensor ◽  
Operating Conditions ◽  
Gauge Factor ◽  
Coating Film ◽  
Damage Initiation ◽  
Flexible Strain Sensor

Composites are prone to failure during operating conditions and that is why vast research studies have been carried out to develop in situ sensors and monitoring systems to avoid their catastrophic failure and repairing cost. The aim of this research article was to develop a flexible strain sensor wire for real-time monitoring and damage detection in the composites when subjected to operational loads. This flexible strain sensor wire was developed by depositing conductive silver (Ag) nanoparticles on the surface of nylon (Ny) yarn by electroless plating process to achieve smallest uniform coating film without jeopardizing the integrity of each material. The sensitivity of this Nylon/Ag strain sensor wire was calculated experimentally, and gauge factor was found to be in the range of 21–25. Then, the Nylon/Ag strain sensor wire was inserted into each composite specimen at different positions intentionally during fabrication depending upon the type of damage to detect. The specimens were subjected to tensile loading at a strain rate of 2 mm/min. Overall mechanical response of composite specimens and electrical response signal of the Nylon/Ag strain sensor wire showed good reproducibility in results; however, the Nylon/Ag sensor showed a specific change in resistance in each direction because of the respective position. The strain sensor wire designed not only monitored the change in the mechanical behavior of the specimen during the elongation and detected the strain deformation but also identified the type of damage, whether it was compressive or tensile. This sensor wire showed good potential as a flexible reinforcement in composite materials for in situ structural health monitoring applications and detection of damage initiation before it can become fatal.

Development of Flexible Piezoelectric Strain Sensor Array

2017 ◽  
Vol 137 (12) ◽  
pp. 438-443
Author(s):  
Takahiro Yamashita ◽  
Seiichi Takamatsu ◽  
Hironao Okada ◽  
Toshihiro Itoh ◽  
Takeshi Kobayashi
Keyword(s):  
Sensor Array ◽  
Strain Sensor ◽  
Piezoelectric Strain ◽  
Strain Sensor Array
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