ME 5620 Fracture Mechanics in Engineering Design. Case Study Project

摘要

The objective of the project was to analyze a test failure on a track pin that did not meet the durability requirement. The case study consists of a fracture example subjected to fatigue loading. Several track pins consisted of the same fracture failure which was located at the middle of the pin. The customer defined the crack initiation as the failure criteria; therefore crack propagation or crack growth analysis was excluded from the analysis. The development of the track pin consisted of three different designs. The first design had a thin-wall section and surface treatment A. The second design was modified to a thick wall section with a surface treatment B. The third design went back to the original thin-wall section, but modified its original surface treatment to surface treatment C. A FEA and Fatigue analysis was conducted to determine if the new designs meet the durability requirement of 5000 miles.