Remaining Fatigue Life Assessment by Using Crack Growth Model

Fatigue has become major causes of deterioration among mechanical equipments. Study shows that 90 percent of all mechanical services failure was contributed by fatigue. For this reason, conducting fatigue reliability analysis was essential in maintaining the availability and reliability of the system. The Remaining Fatigue Life Assessment by using Crack Growth Model (CGM) has been conducted as an initiative to prevent fatigue failure. The objective of the study is to estimate the fatigue crack growth over the time period, and develop the Crack Growth Model by using spreadsheet that assists the engineers in preventing fatigue damage. In this project, the analysis was focused at the crack initiation and propagation on the material surface. The crack advance was depending on the number of work cycles and year of services. As soon as the applied load exceeding fatigue limit depending on the material properties, the possibility of sudden fracture is very high. The framework is prototyped into an analyzing tool using Microsoft Excel and Microsoft Visual Basic. Monte Carlo Simulation has been majorly applied in this analysis. It was referred as deterministic method by using series of random numbers. This project work would be expected to contribute in assisting engineers in predicting the next possible failure and monitoring the reliability level of the equipments. This studies help in improving reliability, efficiency, and productivity of the system.