Fatigue under wide band random stresses using the rain-flow method

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · J. Eng. Mater. Technol.; (United States)

DOI:https://doi.org/10.1115/1.3443520· OSTI ID:5846849

Wirsching, P H; Shehata, A M

The University of Arizona has developed a fatigue design procedure for structural components, such as offshore platforms, subjected to a stationary, wide-band-gaussian stress process. Resticted to high-cycle fatigue design, this procedure uses available constant-amplitude material-fatigue data, a modified probability-based Palmgren-Miner rule, and the rain-flow method of counting stess cycles. Statistical uncertainty in fatigue behavior and nonstatistical uncertainty in the PM rule are implicitly accounted for by treating the PM index at failure as a random variable. The fatigue design algorithm requires only that the rms and irregularity factor of the stress process be specified in addition to the constant-amplitude stress/cycle curve for the material.

• OSTI ID: 5846849
• Journal Information: J. Eng. Mater. Technol.; (United States), Journal Name: J. Eng. Mater. Technol.; (United States) Vol. 99; ISSN JEMTA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ALGORITHMS
DESIGN
FATIGUE
MATHEMATICAL LOGIC
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
OFFSHORE PLATFORMS
STRESSES
STRUCTURAL BEAMS
SUPPORTS