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 language | English (US) |
|---|---|
| Title of host publication | Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference |
| DOIs | |
| State | Published - 2011 |
| Externally published | Yes |
| Event | 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Denver, CO, United States Duration: Apr 4 2011 → Apr 7 2011 |
Other
| Other | 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference |
|---|---|
| Country | United States |
| City | Denver, CO |
| Period | 4/4/11 → 4/7/11 |
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ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Materials Science(all)
- Aerospace Engineering
- Architecture
Cite this
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 proceeding › Conference contribution
}
TY - GEN
T1 - An equivalent stress level model for efficient fatigue crack growth prediction
AU - Xiang, Yibing
AU - Liu, Yongming
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84872442217&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84872442217&partnerID=8YFLogxK
U2 - 10.2514/6.2011-2033
DO - 10.2514/6.2011-2033
M3 - Conference contribution
AN - SCOPUS:84872442217
SN - 9781600869518
BT - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ER -