Abstract
Balsa wood, as one of the lightest woods available, presents superior mechanical properties, and thus it is one of the most appealing core materials particularly for marine and aerospace applications. However, the strengthening and toughening mechanisms in balsa wood are still poorly understood. The present work indicates that the samples exhibit higher strength and toughness concurrently, provided the loading direction is perpendicular to rays; in this case, vessels with strong walls can provide mechanical support, blunt cracking and stop horizontal cracking, and rays can arrest axial cracking. The present research findings are expected to provide fundamental insight into the design of high-performance bionic materials with a highly fibrous and porous structure.
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