The Influences of Residual Stress in Epoxy Carbon-fiber Composites under High Strain-rate
Epoxy carbon-fiber composite (FRP) has been widely regarded as premium construction material in automobile and leisure sporting good industries. In this research, the formation of residual strain in epoxy carbon fiber composites during curing was monitored using Fiber Bragg Gratings (FBG). Carbon-fiber composites were prepared under steady temperature gradient and the FBGs were embedded during FRP preparation process along axial fiber layout direction. The effect of residual stress to the dynamic tensile stress in these FBG imbedded carbon fiber composites was examined using modified Split Hopkinson Tensile Bar (SHTB). The relationship between residual stress and dynamic tensile stress in the FRP under a high strain rate ranging from 500 to 1000 s-1 was thus studied.
KeywordsResidual Stress Fiber Bragg Grating Residual Strain Fiber Reinforce Polymer Fiber Bragg Grating Sensor
Unable to display preview. Download preview PDF.
- 1.Tsai L., Cheng T. C., Lin C. L. and Chiang C. C., Application of the embedded Optical Fiber Bragg Grating sensors in curing monitoring of Gr/Epoxy laminated composites, Proceedings of SPIE, 2009Google Scholar
- 2.Mandal J., Bragg grating tuned fiber laser system for measurement of wider range temperature and strain, Optics Communications, 2005Google Scholar
- 3.Tsai L., Chiang C. C., Wang S. H., and Lin H. R., Dynamic Response of Low Friction, High Strength Hydrogels, 25th Annual Conference of Chinese Society of Mechanical Engineering, 2009Google Scholar
- 4.Bailey J. A., Mechanical Testing and Evaluation, ASM Vol.8Google Scholar