Abstract
The interfacial stress transfer behavior of a Kevlar 49 aramid fiber-epoxy matrix was studied with fiber pullout tests, the fibers of which were stretched by a homemade microloading device. Raman spectra on the embedded fiber were recorded by micro-Raman spectroscopy, under different strain levels. Then, the fiber axial stress was obtained by the relationship between the stress and Raman shift of the aramid fiber. Experimental results revealed that the fiber axial stress increased significantly with the load. The shear stress concentration occurred at the fiber entry to the epoxy resin. Thus, interfacial friction stages exist in the debonded fiber segment, and the interfacial friction shear stress is constant within one stage. The experimental results are consistent with the theoretical model predictions.
PDF Article
More Like This
Shear stress sensing with Bragg grating-based sensors in microstructured optical fibers
Sanne Sulejmani, Camille Sonnenfeld, Thomas Geernaert, Geert Luyckx, Danny Van Hemelrijck, Pawel Mergo, Waclaw Urbanczyk, Karima Chah, Christophe Caucheteur, Patrice MĂ©gret, Hugo Thienpont, and Francis Berghmans
Opt. Express 21(17) 20404-20416 (2013)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription