Study On The Mechanics Performance Of Carbon Fiber Cement-based Composite Materials Based On Mesoscopic Geometrical

Adding some chopped carbon fiber in cement mortar can enhance the toughnessand improve the mechanical properties of the cement base material. At present, thereare many references about the mechanical properties of carbon fiber cement mortarcomposite materials (CFRC), but most of them use experimental method. This articleThis article bases on the mesoscopic structure of carbon fiber cement mortar, usingEshebly equivalent inclusion principle and Mori-Tanaka method to study themechanics properties of CFRC，then get the actual parameter values of CFRC throughthe experiment. Compare and analysis the results of theoretical calculation withexperimental results, and discuss the feasibility of theoretical method used in thisarticleIn this paper, the work and the conclusion mainly include:Firstly, using Eshebly equivalent inclusion principle and Mori-Tanaka method tostudy the mechanics properties of CFRC from Mesoscopic mechanics, then deduce themechanics parameter expression of the CFRC. Use the elastic modulus and Poisson’sratio of carbon fiber，the elastic modulus and Poisson’s ratio of and cement basematerial and the volume percent of carbon fiber to calculate the mechanics parametersof different volume percent of carbon fiber CFRC, and get the variation laws of theelasticity modulus of CFRC with the volume percent of carbon fiber.Secondly, make the CFRC block with the volume percent of carbon fiber are0.3%、0.6%、0.9%in lab. Measure out the stress-strain relationship of different CFRCblocks and the parameter values of its mechanical properties. Then discuss thevariation laws of the mechanical properties of CFRC with the volume percent ofcarbon fiber.At last, compare the theoretical calculation results with experimental results,it shows that the difference between theoretical calculation result and experimental result is little when the volume percent of carbon fiber is little. With the increasing ofvolume percent of carbon fiber, the difference increases. So Mori-Tanaka method canbe well used to calculate the mechanics properties of CFRC with the volume percent ofcarbon fiber is low.