%0 Journal Article
%T Mechanistic model for fiber crack density prediction in cyclically loaded carbon fiber
%A Anirban Guha
%A Asim Tewari
%A Chandrashekhar P Hiremath
%A K Senthilnathan
%A Niranjan K Naik
%J Journal of Composite Materials
%@ 1530-793X
%D 2019
%R 10.1177/0021998318793928
%X Prediction of the fiber crack density (as one of the microstructural damages) for unidirectional fiber-reinforced polymer composite under monotonic tensile load, using strength models, has been reported in the literature. However, the microstructural damage prediction for a fiber-reinforced polymer subjected to fatigue loading is still a challenge. In this work, a progressive damage initiation model was developed to predict the fiber crack density in carbon fiber-reinforced polymer composite subjected to fatigue loading. A stochastic model was used for modeling the fiber fatigue strength. Reduction in effective life of the fiber was modeled using linear Miner¡¯s rule. Effect of fatigue strength parameters on fiber crack density was found to be considerable compared to the effect of interface shear strength. At a low number of cycles, fiber crack density obtained from the model was in good agreement with the experimentally measured fiber crack density
%K Carbon fiber-reinforced polymer
%K damage initiation
%K fatigue
%K fiber crack density
%K mechanistic model
%K microstructural damage
%U https://journals.sagepub.com/doi/full/10.1177/0021998318793928