scholarly journals Fiber Cross-Section Shape Effect on Rate-Dependent Behavior of Polymer Matrix Composites with Fiber Bragg Grating Sensors

2013 ◽  
pp. 403
Keyword(s):  
Fiber Bragg Grating ◽  
Cross Section ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Shape Effect ◽  
Matrix Composites ◽  
Fiber Bragg Grating Sensors ◽  
Rate Dependent ◽  
Dependent Behavior ◽  
Section Shape

scholarly journals UV Sensor Based on Fiber Bragg Grating Covered with Graphene Oxide Embedded in Composite Materials

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5468
Author(s):  
Piotr Lesiak ◽  
Karolina Bednarska ◽  
Krzysztof Małkowski ◽  
Łukasz Kozłowski ◽  
Anna Wróblewska ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Epoxy Resin ◽  
Fiber Bragg Grating ◽  
Uv Radiation ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Glass Fibers ◽  
Fiber Optic Sensor ◽  
Bragg Grating ◽  
Matrix Composites

Polymer–matrix composites degrade under the influence of UV radiation in the range of the 290–400 nm band. The degradation of polymer–matrix composites exposed to UV radiation is characterized by extensive aging of the epoxy matrix, resulting in deterioration of their mechanical properties. Glass fibers/epoxy resin composites were made by an out-of-autoclave method whereas a fiber optic sensor was placed between different layers of laminates. In our work, we used a fiber Bragg grating sensor covered with graphene oxide and embedded in a polymer matrix composite to monitor UV radiation intensity. Measurements of UV radiation may allow monitoring the aging process of individual components of the polymer composite. In order to estimate the number of microcracks of epoxy resin, microstructure observations were carried out using a scanning electron microscope.

Fiber Cross-Section Shape Effect on Rate-Dependent Behavior of Polymer Matrix Composites with Fbgs Sensors

2013 ◽  
Vol 284-287 ◽  
pp. 132-137
Author(s):  
Zhi Zhai ◽  
Zheng Jia He ◽  
Xue Feng Chen ◽  
Jun Jie Ye ◽  
Xiao Jun Zhu
Keyword(s):  
Cross Section ◽  
Internal State ◽  
Micromechanical Model ◽  
Constitutive Relationship ◽  
Shape Effect ◽  
State Variables ◽  
Fiber Cross Section ◽  
Rate Dependent ◽  
Cross Section Shape ◽  
Section Shape

The micromechanical investigation of fiber cross-section shape effect on the rate sensitive nonlinear behavior of a glass/epoxy was performed at 10-5/s and 1/s, which considering four shapes, square, cross, circle and ellipse. With the strain of different rate loadings measured by Fibre Bragg gratings (FBGs) sensors, the rate-dependent inelastic constitutive relationship of epoxy is built by using an internal state variables viscoplasticity model. Then, through homogenizing the properties of unit cells, the responses of resin and its composites at 30° and 60° off-axis loadings are predicted by a micromechanical model compared with the experiments data. The effect of fiber cross-section fiber on the 30° and 90° off-axis responses are discussed with respect to the viscoplastic parameters of the resin determined. The results indicate that the micromechanical model accurately calculates the behavior of the PMCs employed. The square fiber causes the largest flow stress and plastic strain in the four cases. And the influences on overall responses for the four fiber shapes are enhanced with raising off-axis angles but weaken with the rate increase. However, the elliptical fiber yields the highest modulus in linear elastic stage. The square fiber is the most effective and the elliptical fiber is the least effective in the nonlinear deformation stage. Besides, the elastic properties are unaffected by loading rates when it is less than 1/s.

Improved Transverse Shear Calculations for Rate-Dependent Analyses of Polymer Matrix Composites.

AIAA Journal ◽  
2005 ◽  
Vol 43 (4) ◽  
pp. 895-905 ◽  
Author(s):  
Linfa Zhu ◽  
Heung Soo Kim ◽  
Aditi Chattopadhyay ◽  
Robert K. Goldberg
Keyword(s):  
Polymer Matrix ◽  
Transverse Shear ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Rate Dependent

Polymer matrix composites and technology

2011 ◽  
Author(s):  
Ru-Min Wang ◽  
Shui-Rong Zheng ◽  
Ya-Ping Zheng
Keyword(s):  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Matrix Composites
Sign in / Sign up

Export Citation Format

Share Document