Analysis of Crack in Shaft using Creo

Abstract

This paper deals with finding the relation between modal natural frequencies change due to
crack in shaft with respective crack depth and location. In this study we investigate relation
among crack depth, crack location & natural frequency. Finite Element Analysis is done for
single crack at different depth and crack thickness. The analysis results reveal, how modal
natural frequencies decrease with change in crack size. It is known that when a shaft or
structure suffers from crack or any damage then its dynamic property changes. The reason for
this behaviour because of crack causes a stiffness reduction with an inherent reduction in
modal natural frequencies which leads to the change in the dynamic response of the Shaft.
Creo software is used for parametric modeling of Rotor Shaft as well as for static and dynamic
analysis. Modal natural frequency was found to be decreasing with increase in crack depth
and its width. This is new technology in Creo, so this study the FEA analysis is carried out
using this new technology and compared with other FEA software available in market.