Very High Cycle Fatigue (VHCF-4)

Venue: University of Michigan

Location: Ann Arbor, Michigan, United States

Event Date/Time: Aug 19, 2007
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Description

In recent years, there has been a growing emphasis on safely extending the service lives of existing transportation and power generation systems beyond their original design lifetimes.

The need to reduce environmental impact and the need for increased economic efficiency are driving the design of new components and systems in which fatigue lifetimes as long as 109 to 1010 cycles are required. Thus, there is global interest in, and need for, improved understanding of the fatigue behavior of structural materials in the very high cycle fatigue (VHCF) regime.

Mechanisms of crack initiation and crack propagation at very long lifetimes and the role of microstructure, defects and environment on these phenomena
Fatigue life variability and its dependence on microstructure variability in the very high cycle regime
Effect of variable amplitude loading on high cycle fatigue (HCF) damage
Statistical and probabilistic modeling of very long life fatigue behavior and the development of life prediction models
Similarities and differences between life-limiting behavior in HCF and VHCF
Environment and temperature effects on VHCF behavior
Surface modification and other methods to improve VHCF behavior
Assessment and modeling of fatigue damage accumulation in VHCF regime
Fatigue threshold, nonpropagating cracks and fatigue limits at very long lifetimes
Growth of small and short cracks
Instrumentation and experimental methods for fatigue research in the very high cycle regime
Fatigue design and damage detection at very long lifetimes
New materials and methods for improved fatigue performance in the very high cycle regime
Case studies of fatigue failure at very long lifetimes
Prognosis and structural materials health management in the VHCF regime

Venue