NUMERICAL EVALUATION OF CHARPY IMPACT TEST PERFORMANCE FOR ALUMINIUM ALLOY

Abstract

Proper interpretation of the material behaviour is of utmost importance, especially under dynamic loading, while designing a structure. The main objective of the current study is to estimate the impact strength of Aluminum alloy by Charpy test numerically. It is considered to be a cost-effective test which is extensively utilized to estimate the energy absorbed during fracture under impact loading by a notched specimen. However, the experimental measurement of the same may be cumbersome and time-consuming. Thus, the current study imparted the simulation-based approach to understand the toughness behaviour of the alloy under a high strain rate at room temperature. The three-dimensional finite element simulation analysis considered the effect of major parameters such as striker notch radius and striker velocities on energy absorbed by the material at a high strain rate in room temperature conditions. The simulation utilized the Johnson-Cook (J-C) approach to model the fracture behavior under the impact loading conditions. The J-C model parameters were taken from an independent literature. This paper may serve as a basis to measure the fracture toughness of metals.