Cure-Induced Strain Development in an RTM Epoxy Resin as Monitored by Fiber Bragg Grating Sensors

2013 ◽  
Vol 694-697 ◽  
pp. 947-951
Author(s):  
Xue Qin Li ◽  
Zi Long Zhang ◽  
Xiao Su Yi
Keyword(s):  
Epoxy Resin ◽  
Fiber Bragg Grating ◽  
Shrinkage Strain ◽  
Linear Shrinkage ◽  
Curing Temperature ◽  
Bragg Grating ◽  
Curing Process ◽  
Strain Development ◽  
Fiber Bragg Grating Sensors ◽  
Strain Monitoring

Optimizing the curing temperature to reducing the process costs may influence the properties of the material and bring quality assurance aspects. To solving the problem, real-time strain monitoring of the curing process has become more and more important and urgent. Fiber Bragg grating sensors were successfully used in this work to monitoring the residual strain building-up and the gelling phenomena of an RTM epoxy resin. The results shows chemical shrinkage strain during isothermal curing is bigger for higher curing temperature, but the average linear shrinkage ratio during cooling is smaller.

An Investigation of Optical-Mechanical Transfer of Surface-Bonded Fiber Bragg Grating Sensors for Aerostat Envelope Strain Monitoring

2013 ◽  
Vol 11 (5) ◽  
pp. 812-819 ◽  
Author(s):  
Q. B. Wang ◽  
H. T. Zhao ◽  
Y. Qiu ◽  
J. A. Chen ◽  
Y. Y. Wang ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
Strain Monitoring

Strain monitoring of railway based on fiber Bragg grating sensors

2013 ◽  
Author(s):  
Pengfei Wang ◽  
Dawei He ◽  
Yongsheng Wang ◽  
Tao Wang ◽  
Yu Quan ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
Strain Monitoring

Strain monitoring of laminate glass in glass trestle by fiber Bragg grating sensors

Optik ◽  
2020 ◽  
Vol 209 ◽  
pp. 164496
Author(s):  
Bin Liu ◽  
Changhang Li ◽  
Shihai Zhang ◽  
Jianping He
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Laminate Glass ◽  
Fiber Bragg Grating Sensors ◽  
Strain Monitoring

The Curing Residual Strain Monitored by Fiber Bragg Grating Sensors

2012 ◽  
Vol 605-607 ◽  
pp. 1007-1011 ◽  
Author(s):  
Heng Tian ◽  
Chun Sheng Ye ◽  
Xiu Ting Bao
Keyword(s):  
Residual Stress ◽  
Glass Transition ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Gel Point ◽  
Strain Sensitivity ◽  
Curing Process ◽  
Central Wavelength ◽  
Fiber Bragg Grating Sensors ◽  
Fbg Sensors

The origin and damage of curing residual stress were firstly investigated briefly in this paper.And then Fiber Bragg Grating (FBG) sensors with different central wavelength were used to test the temperature sensitivity and the strain sensitivity. At last, the naked and encapsulated FBG sensors were layed parallelling into prepreg to monitor the whole curing process, and the results clearly showed the situation change of strain, the appearance of gel point and glass transition temperature.

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