Finite Element Analysis Of Strain Signal From Charpy Impact

Nabiha, Pathil (2015) Finite Element Analysis Of Strain Signal From Charpy Impact. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 pages) Finite Element Analysis Of Strain Signal From Charpy Impact 24 Pages.pdf - Submitted Version Download (556kB)

Abstract

Charpy impact test are inexpensive impact testing that can be used in order to measure the energy absorbed of the material. Previous studies have shown that the energy absorbed measured using the instrumented Charpy impact test is not accurate. So, new way to determine the strain energy with three different velocities by using signal processing approach need to be studied. This project uses numerical analysis based on Finite Element Analysis to simulate the Charpy impact test and the strain from the striker is obtained from the modeling of Charpy impact test. The material for the specimen is the same as standard ASTM E-23 specimen and three different velocities is used which is 5.18 m/s, 3.35 m/s and 7.00 m/s. The strain signal from these three different velocities will be compared with the experimental strain signal Charpy impact test. For the analysis purpose, the signals obtained will be converted using the Fast Fourier Time (FFT) to convert the time domain to the frequency domain. After that Power Spectrum Density (PSD) method will be used to calculate the strain energy based on the area under the graph. It was found that both the impact strain signal and strain energy are influenced by the velocity of the impact. The PSD values also influenced by the velocity of impact since the strain signal are varied with different velocities.

Actions (login required)

View Item