Track 1 Session 3

1:00 to 2:00 p.m. Wednesday March 28, 2012

Reliability Testing in Components Under Thermo Mechanical Loading

Many components in most fields of engineering are subjected to fatigue at elevated temperatures. High-temperature fatigue is mainly a concern at temperatures above 30 or 40 percent of the absolute melting temperature. Since some of these components are costly and safety-critical, it is understandable that there is a significant interest in proper characterization of fatigue behavior at high temperatures. In most cases, the strain life characteristic is not known for a given application and/or a given material. To further complicate the issue, the component application can be in an environment where more than one failure mode due to the application type can be observed. This session presents a practical testing methodology used to determine the product’s operational life given high-temperature operational application. Results are compared with field observations.

Key Words: Accelerated Life Test, Thermo Mechanical Stress, Structural Testing, Reliability Deterioration, Acceleration Factors

Julio Pulido and David Groebel

ReliaSoft Corporation