An equivalent stress level model for efficient fatigue crack growth prediction

Yibing Xiang, Yongming Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A general probabilistic fatigue crack growth prediction methodology under random variable loading is developed using a novel equivalent stress level model and the inverse first-order-reliability method (IFORM). The proposed equivalent stress level model is based on the equivalent transformation of a random variable loading to constant amplitude loading, which avoid cycle-by-cycle calculation. An inverse first-order reliability method (IFORM) is used to evaluate the fatigue crack growth at any arbitrary reliability level. Inverse FORM method reduces the number of function evaluations and the computational cost is significantly reduced. The proposed method is very suitable for real-time damage prognosis and on-line decision making. Numerical examples are used to demonstrate the proposed method. Various experimental data under variable amplitude loading are collected and model predictions are compared with experimental data for model validation.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
DOIs
StatePublished - 2011
Externally publishedYes
Event52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Denver, CO, United States
Duration: Apr 4 2011Apr 7 2011

Other

Other52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityDenver, CO
Period4/4/114/7/11

Fingerprint

Fatigue crack propagation
Random variables
Function evaluation
Decision making
Costs

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)
  • Aerospace Engineering
  • Architecture

Cite this

Xiang, Y., & Liu, Y. (2011). An equivalent stress level model for efficient fatigue crack growth prediction. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [AIAA 2011-2033] https://doi.org/10.2514/6.2011-2033

An equivalent stress level model for efficient fatigue crack growth prediction. / Xiang, Yibing; Liu, Yongming.

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 2011. AIAA 2011-2033.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Xiang, Y & Liu, Y 2011, An equivalent stress level model for efficient fatigue crack growth prediction. in Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference., AIAA 2011-2033, 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Denver, CO, United States, 4/4/11. https://doi.org/10.2514/6.2011-2033
Xiang Y, Liu Y. An equivalent stress level model for efficient fatigue crack growth prediction. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 2011. AIAA 2011-2033 https://doi.org/10.2514/6.2011-2033
Xiang, Yibing ; Liu, Yongming. / An equivalent stress level model for efficient fatigue crack growth prediction. Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 2011.
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