Using multi-axis fiber grating strain sensors to measure transverse strain and transverse strain gradients in composite materials with complex weave structures

2002 ◽  
Author(s):  
Catherine A. Black ◽  
Eric Udd ◽  
Whitten L. Schulz ◽  
Stephen T. Kreger ◽  
Marley Kunzler ◽  
...  
Keyword(s):  
Composite Materials ◽  
Strain Sensors ◽  
Fiber Grating ◽  
Transverse Strain ◽  
Strain Gradients

Curing Residual Strain Monitoring of Carbon Fiber Reinforced Polymer Composite Using Notched Long-Period Fiber Grating

2018 ◽  
Vol 26 (1) ◽  
pp. 27-34
Author(s):  
Ke-Ping Ma ◽  
Chao-Wei Wu ◽  
Bo-Lan Fang ◽  
Chia-Chin Chiang
Keyword(s):  
Residual Stress ◽  
Composite Materials ◽  
Residual Strain ◽  
Structural Engineering ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Strain Monitoring ◽  
Residual Strains ◽  
Period Fiber Grating

Composite materials are widely used in the aerospace industry and structural engineering owing to their advantageous mechanical properties. The curing monitoring of composite material is important to ensure the quality of the curing process, especially for the characterization of residual strains after manufacturing. In this study, we present a notched long-period fiber grating (NLPFG) with a period of 650 μm and a diameter of 66 μm that can be used in the curing monitoring of composite materials. This NLPFG was embedded into the middle layers of composite materials in order to determine the curing residual stress exhibited by the materials. The experimental results showed that the residual stress was about 107 MPa and the axial residual strain was 1490 με. Therefore, the proposed NLPFG has potential as a strain sensor for composite materials.

Fiber Grating Strain Sensors

2003 ◽  
pp. 351-382
Author(s):  
Eric Udd ◽  
Whitten Schulz ◽  
Katy Davol ◽  
Marley Kunzler
Keyword(s):  
Strain Sensors ◽  
Fiber Grating

Transverse fiber grating strain sensors based on dual overlaid fiber gratings on polarization-preserving fibers

1998 ◽  
Author(s):  
Eric Udd ◽  
Whitten L. Schulz ◽  
John M. Seim ◽  
Drew V. Nelson ◽  
Alberto Makino
Keyword(s):  
Strain Sensors ◽  
Fiber Grating ◽  
Fiber Gratings ◽  
Transverse Fiber

The Comparison and Analysis of Fiber Grating Strain Sensor and Resistance Strain Slice for Transmission Tower Vibration Monitoring

2014 ◽  
Vol 533 ◽  
pp. 211-213
Author(s):  
Jin Feng Geng ◽  
Dong Fang Ma ◽  
Hong Sheng Cai ◽  
Wen Tao Wu ◽  
Jun Wei Dong ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Strain Sensors ◽  
Resistance Strain ◽  
Vibration Monitoring ◽  
Bragg Grating ◽  
Fiber Grating ◽  
Transmission Tower ◽  
Existing Problems ◽  
Tower Vibration

Contrast advantages and existing problems of resistance strain slice and fiber grating strain sensor for tower vibration strain monitoring, compare the structure of the two, and do the on-site installation and experiments, analyze the monitoring data. It can make a conclusion that the properties of fiber bragg grating strain sensors are basic consistent with resistance strain slice. And fiber bragg grating strain sensors can be used for transmission tower vibration monitoring .

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