Experimental Study And Numerical Simulation Of Thermal Molding Process Of Carbon Fiber Violin Case

Musical instrument is an important tool of expressing feelings and emotions by music.Violin case is essential for storing,carrying,protecting and repairing musical instruments.And violin case should be durable and waterproof.With the development of music art,consumers are paying more attention to the appearance of the violin case.Due to its high specific strength and specific stiffness,the research about carbon fiber is being conducted and the use of carbon fiber is quite meaningful.This article investigated the mechanical behaviors and deformation mechanism of carbon fabrics forming by combining the experiment and finite element method.Due to the mechanical properties of carbon fiber violin case,the research is based on the constitutive model of continuum mechanics.By compiling subroutine and connect it to the general non-linear finite element software,an appropriate model was established for finite element simulation.The finite element simulation was done to analyze the thermoforming of carbon fiber violin case.And phenomenon of the wrinkle and fold in forming was predicted.In order to eliminate the defects and set reasonable parameters for production experiment and massive production,the change of blank shape and removal of material was done.The geometry parameters of blank were proved appropriate and accurate by compared the results of experiment and simulation.This method is applicable for producing similar box parts and helpful for introducing carbon fiber into bag and luggage industry.This result is meaningful to spread the use of carbon fiber into different fields.