Models of wood fracture in Mode I and Mode II |
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| Authors: | D M Tan S E Stanzl-Tschegg E K Tschegg |
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| Affiliation: | 1. Institute of Meteorology and Physics, University of Agriculture, Vienna, Türkenschanzstra?e 18, A 1180, Wien, Austria
2. Institute of Applied and Technical Physics, Technical University of Vienna, Wiedner Hauptstra?e 4-6, A 1040, Wien, Austria
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| Abstract: | The fracture mechanisms of wood depend on the mode of loading (Mode I and Mode II) and on the orientation of load application (e.g. TL and RL) within a specimen. Experiments were performed in TL and RL orientation and the critical stress intensity factorsK IC andK IIC were determined for different orientations. The micromechanisms of wood fracture were investigated by SEM observations. The reasons why (1) theK IIC are higher than theK IC values, (2) the fracture process of mode II is unstable, (3) the fracture surface is rough and full of warped wood fibers are attempted to answer by considering the micromechanical fracture features of wood. |
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