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Dynamic Transverse Debondong Of A Single S-2 Fiber, Stephen E. Levine
Dynamic Transverse Debondong Of A Single S-2 Fiber, Stephen E. Levine
Open Access Theses
Fiber reinforced composites are becoming increasingly common due to their high strength to weight ratios as compared to more conventional materials. Along with this increased used comes the need to have a higher level of understanding of the material characteristics. Specifically, the interface between the fiber and matrix is of particular interest. Loss of adhesion at this interface, known as debonding, can greatly decrease material strength. There has been significant research into debdonding phenomena at low strain rates. However, there is still a need for further insight at higher strain rates. In addition, given the opacity of many epoxy resins, …
Biaxial Shear/Tension Failure Criteria Of Spectra Single Fibers, Jianzhuo Sun
Biaxial Shear/Tension Failure Criteria Of Spectra Single Fibers, Jianzhuo Sun
Open Access Theses
An experimental study was conducted to develop the biaxial failure surface criteria of single Spectra 130d and 100d filaments in a torsion-tension environment. The cross-sectional profiles of single Spectra fibers were investigated using scanning electron microscopy and X-ray computed tomography. A pin-gripping method to fix the ends of a polyethylene single fiber was developed. Effects of pin diameter on failure stress for both Spectra 130d and 100d were characterized. It was found that the perturbed stress field effect can be neglected when the pin diameter is larger than 0.8 mm. Additionally, the effect of the sample's gage length on fiber …