Browse Publications Technical Papers 2016-01-0370
2016-04-05

Probabilistic Isothermal, Anisothermal, and High-Temperature Thermo-Mechanical Fatigue Life Assessment and CAE Implementations 2016-01-0370

Fatigue life assessment is an integral part of the durability and reliability evaluation process of vehicle exhaust components and systems. The probabilistic life assessment approaches, including analytical, experimental, and simulation, CAE implementation in particular, are attracting significant attentions in recent years. In this paper, the state-of-the-art probabilistic life assessment methods for vehicle exhausts under combined thermal and mechanical loadings are reviewed and investigated. The loading cases as experienced by the vehicle exhausts are first categorized into isothermal fatigue, anisothermal fatigue, and high-temperature thermomechanical fatigue (TMF) based on the failure mechanisms. Subsequently, the probabilistic life assessment procedures for each category are delineated, with emphasis on product validation. Finally, two examples: an isothermal fatigue life assessment for a welded exhaust sub-system, and a high-temperature TMF life assessment for an exhaust manifold (base material) are provided to demonstrate the probabilistic life assessment procedure with the computer-aided engineering (CAE) and finite-element analysis (FEA) tools.

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

CAE Process for Developing Cylinder Head Design Including Statistical Correlation and Shape Optimization

2010-01-0494

View Details

TECHNICAL PAPER

Criticality of Tube Bending Through CAE Understanding

2016-01-1366

View Details

TECHNICAL PAPER

MMLV: Vehicle Durability Design, Simulation and Testing

2015-01-1613

View Details

X