Analysis on low velocity impact performance and damage behavior of carbon fiber composite beam

TOU Lixin, WANG Qiucheng, CHEN Guangyao

(College of Mechanical Engineering，Zhejiang University of Technology，Hangzhou 310014，China)

Abstract: Aiming at the impact resistance of the woven carbon fiber composite bumper beam, different layers of the plain woven carbon fiber composite laminates were made by VARIM，and tested with charpy impact. The mechanism of energy absorption was explored through the results of impact responses and damage behaviour. ABAQUS/Explicit was used to set up the analysis model of the charpy impact with the modified Hashin failure criteria to explore the process of the dynamic response and damage behavior. The results indicate that the main damage behavior of the carbon fiber composite beam is fiber fracture. The contact force and impact strength can be improved by increasing the number of (0,90) layers . The intense damage can be alleviated by (±45) layers when put it on the surface. The experimental results indicate that the error of the simulated peak force is 5.1% and the peak displacement is 3.2%, the validity of the FE model is proved which can be the basis of the carbon fiber composite bumper design.

Key words: carbon fiber composite; low velocity impact; damage behavior; finite element simulation