Abstract
| Original language | English |
|---|---|
| Journal | Journal of Sandwich Structures & Materials |
| Volume | 17 |
| Issue number | 5 |
| Pages (from-to) | 562-577 |
| Number of pages | 16 |
| ISSN | 1099-6362 |
| DOIs | |
| Publication status | Published - 2015 |
Keywords
- Probabilistic
- Fatigue
- Balsa
- Reliability
- Transverse shear
- Sandwich
- Composites
Cite this
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Probabilistic fatigue life of balsa cored sandwich composites subjected to transverse shear. / Dimitrov, Nikolay Krasimirov; Berggreen, Christian.
In: Journal of Sandwich Structures & Materials, Vol. 17, No. 5, 2015, p. 562-577.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Probabilistic fatigue life of balsa cored sandwich composites subjected to transverse shear
AU - Dimitrov, Nikolay Krasimirov
AU - Berggreen, Christian
PY - 2015
Y1 - 2015
N2 - A probabilistic fatigue life model for end-grain balsa cored sandwich composites subjectedto transverse shear is proposed. The model is calibrated to measured three-pointbending constant-amplitude fatigue test data using the maximum likelihood method. Some possible applications of the probabilistic model are obtaining characteristic S–Ncurves corresponding to a given survival probability, and calibrating partial safety factorsfor material fatigue. The latter is demonstrated by a calibration performed using reliability analysis with the first-order reliability method. The measured variance in balsa shearproperties, for both static strength and fatigue failure, is higher than the variance normallyobserved in the properties for fiber-reinforced polymer composite laminates. This could be attributed to the fact that end-grain balsa wood is the product of a naturally occurringgrowth process, which cannot be controlled to the same extent as an industrial manufacturing processes. The large variance in the probabilistic model for fatigue life is reflected in the corresponding calibrated partial safety factors, which are higher thanthe factors usually associated with synthetic materials such as fiber-reinforced laminates.
AB - A probabilistic fatigue life model for end-grain balsa cored sandwich composites subjectedto transverse shear is proposed. The model is calibrated to measured three-pointbending constant-amplitude fatigue test data using the maximum likelihood method. Some possible applications of the probabilistic model are obtaining characteristic S–Ncurves corresponding to a given survival probability, and calibrating partial safety factorsfor material fatigue. The latter is demonstrated by a calibration performed using reliability analysis with the first-order reliability method. The measured variance in balsa shearproperties, for both static strength and fatigue failure, is higher than the variance normallyobserved in the properties for fiber-reinforced polymer composite laminates. This could be attributed to the fact that end-grain balsa wood is the product of a naturally occurringgrowth process, which cannot be controlled to the same extent as an industrial manufacturing processes. The large variance in the probabilistic model for fatigue life is reflected in the corresponding calibrated partial safety factors, which are higher thanthe factors usually associated with synthetic materials such as fiber-reinforced laminates.
KW - Probabilistic
KW - Fatigue
KW - Balsa
KW - Reliability
KW - Transverse shear
KW - Sandwich
KW - Composites
U2 - 10.1177/1099636215582214
DO - 10.1177/1099636215582214
M3 - Journal article
VL - 17
SP - 562
EP - 577
JO - Journal of Sandwich Structures & Materials
JF - Journal of Sandwich Structures & Materials
SN - 1099-6362
IS - 5
ER -