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Fatigue behaviour and size effect perpendicular to the grain of laminated Douglas fir veneer Norlin, Lars Peter
Abstract
The rolling shear behaviour of laminated Douglas fir veneers was studied using specimens with 15 layers of 2.5 mm veneers. The 3 central layers were cross-plies with grain angle oriented perpendicular to the long axis of the specimen. The other layers were orthogonal to the central layers. Based on three specimen sizes, the width effect and load configuration effect for rolling shear failures of laminated veneer panels subjected to "flatwise" three-point bending was experimentally and theoretically evaluated. The rolling shear fatigue performance of the specimens was studied through cyclic testing until failure. Series of specimens were tested at three mean stress levels, 95%, 91%, and 83% of the of the mean static strength. A damage model which took the stress history into consideration was calibrated to the experimental data. Good agreement between model predictions and experimental results were obtained. Using a size adjustment factor, the model was verified by two cyclically tested series of specimens of different size. The size adjusted model predictions were found to agree well with the experimental data.
Item Metadata
Title |
Fatigue behaviour and size effect perpendicular to the grain of laminated Douglas fir veneer
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1997
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Description |
The rolling shear behaviour of laminated Douglas fir veneers was studied using
specimens with 15 layers of 2.5 mm veneers. The 3 central layers were cross-plies with
grain angle oriented perpendicular to the long axis of the specimen. The other layers
were orthogonal to the central layers.
Based on three specimen sizes, the width effect and load configuration effect for
rolling shear failures of laminated veneer panels subjected to "flatwise" three-point
bending was experimentally and theoretically evaluated.
The rolling shear fatigue performance of the specimens was studied through
cyclic testing until failure. Series of specimens were tested at three mean stress levels,
95%, 91%, and 83% of the of the mean static strength. A damage model which took the
stress history into consideration was calibrated to the experimental data. Good agreement
between model predictions and experimental results were obtained. Using a size
adjustment factor, the model was verified by two cyclically tested series of specimens of
different size. The size adjusted model predictions were found to agree well with the
experimental data.
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Extent |
4616969 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-03-21
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0087756
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1997-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.