In this study, research was focused on material responses bamboo beam when subjected to bending load. Triple point bending tests were adapted for material behavior characterization. The distance between two lower supports was 120.0 mm. In the test, Digital Image Correlation was utilized to determine the full field of displacement and strain on the side of the bending samples during the loading process (Fig. 10.2). 10.3 Results and Discussion Bamboo is a natural composite. It has periodic appearing nodal structures along the longitudinal axis (Fig. 10.3a). The macro-fibers are parallel with each other along the longitudinal axis between two nodes. The macro-fibers are continuing between the two nodes. The macro-fibers in one section tangle with the fibers in nearby section to form the a node (Fig. 10.3c). Bamboo consists of hierarchical structures of a couple of length scale. Shown in Fig. 10.3b, d, e are the structures of the bamboo on a transverse cross section. At macro-scale, the bamboo is a fiber reinforced composite. Fig. 10.1 Photos of tested samples, (a) side view, (b) top view Table 10.1 Dimension of bamboo samples for bending tests Test number Sample number Height (mm) Width (mm) Length (mm) Loading condition 2a 2 6.636 6.31 155.21 First time to be loaded 2b 2 6.636 6.31 155.21 Re_loaded couple day later 3a 3 (with node) 6.670 6.463 197.97 First time to be loaded 3c 3 (with node) 6.670 6.463 197.97 Re_loaded couple day later Fig. 10.2 Experimental set up of the tests 68 S. Xu et al.
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