Viscoelastic and Processing Effects on the Fiber-Matrix Interphase Strength. Part I. The Effects of Loading Rate, Test Temperature, Fiber Sizing and Global Strain Level |
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| Authors: | Erol Sancaktar Aydin Turgut Fei Guo |
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| Affiliation: |
a Mechanical and Aeronautical Engineering Department, Clarkson University, Potsdam, NY, U.S.A.
b Mechanical Engineering Department, Firat University, Elazig, TURKEY
c Mechanical Engineering Department, Jinzhou Institute of Technology, PRC |
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| Abstract: | The effects of loading rate, fiber sizing, test temperature and global strain level on the adhesion strength between carbon fibers and a thermosetting epoxy (Epon 815) are studied using the single fiber fragmentation test procedure. Analytical methodology describing the viscoelastic behavior observed is also presented. The possibility of rate-temperature-interphase thickness superposition for the interfacial strength function is illustrated based on the analytical models discussed. Experimental data are discussed using Weibull statistics and also presented in the form of percent relative frequency histograms for the fiber fragments in a collective fashion. The use of histograms allows for interpretation of the skewness in the data population. |
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| Keywords: | Fiber-matrix interphase single-fiber fragmentation test fiber sizing rate-temperature-interphase thickness superposition nonlinear viscoelastic stress analysis critical fiber fragment size |
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