Browse Publications Technical Papers 2011-01-0783
2011-04-12

Temperature Effect in Exhaust System Fatigue Life Prediction 2011-01-0783

Automotive exhaust system experiences vibratory and thermal loads. Bogey test had been the major validation method until recent years when the strain-life approach was adopted to evaluate component's fatigue life. In practice, when using the strain-life model to evaluate a component subjected to elevated temperature, temperature effect on component fatigue life is considered by introducing a temperature scale factor KC that is used to scale up the measured nominal strain, hence the mechanical load. This paper intends to propose a method to estimate KC by designing component bench tests at room temperature and at elevated temperature, respectively. Two major failure modes in the exhaust system are investigated and different temperature effects on the base metal fatigue and on the weld or heat-affected zone are analyzed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Dynamic Characteristics Analysis and Fatigue Damage Estimation of a Compressor Blade under Fluid-Structure Interaction

2018-01-1206

View Details

TECHNICAL PAPER

Designing Reliability into an Air Turbine Starter

831541

View Details

Book
BOOK

CAE Design and Failure Analysis of Automotive Composites

View Details

X