COMPARATIVE ANALYSIS OF CRACK PROPAGATION IN VIBARATING CANTILEVER BEAMS OF BRASS AND ALUMINIUM

JN Mahto, S C Roy

Abstract: In present investigation, attempt has been made to find out the propagation of crack growth rate of vibrating cantilever beams of brass and aluminium from free end to fixed end. The values of V, B, F, and D were observed and calculated at different frequency of 60 Hz,80 Hz,100 Hz and 120 Hz. Fixing length of specimens of both the materials were kept constant at a value of 400 mm and 350 mm during experimental work. Cracks of size 2 mm x 2 mm were artificially generated at 155 mm and 123 mm from free end. A mathematical model was developed using dimensional analysis to find out the value of crack growth rate along the vibrating cantilever beam. Calculated values of G were plotted to observe crack growth rate along the beam for different specimens of brass and aluminium at different crack location. Plots were compared and analysed to find out the effect of Crack location at different frequency.

Keywords: Accelerometer, Cantilever Beam, Crack Growth Rate, Fixing Length, Frequency, Velocity of Vibration

DOI: https://doi.org/10.15623/ijret.2016.0510030