Bamboo is a kind of tough light natural environment-friendly material. In recent years, with its superior physical properties, its application range has been continuously broadened. the first bamboo floor to auto parts, bamboo is trying to enter more emerging fields. In recent years, researchers Hokkaido University, Kumamoto Prefecture University Yamanashi University in Japan have obtained the idea of designing lightweight high-strength cylindrical composite materials by studying the fiber distribution characteristics of bamboo.

In terms of structure, bamboo is a kind of fiber-reinforced composite material, which is composed of two main tissues: the fiber (vascular bundle) as reinforcement the thin-walled cell as matrix. These fibers have strong rigidity can be compared with steel bars. In order to identify the relationship between the distribution characteristics of reinforced fibers the bending rigidity of bamboo culm, the researchers studied the fiber distribution in the cross section of bamboo.

It is found that the fiber distribution in the wood part of the bamboo cross section is uneven. The fiber density gradually increased the inside to the outside, showing a partial distribution, which shows that the mechanical properties of the external bamboo are stronger than the internal bamboo. This is also why bamboo can resist strong crosswind. Comparing the real bamboo fiber distribution data with the theoretical fiber distribution data, it is found that the two are almost the same. a large number of fibers are found in the base of bamboo culm, the actual fiber distribution is consistent with the secondary gradient distribution derived the theory; in the tip of bamboo culm with less fibers than the base of culm, the actual data is consistent with the linear distribution calculated in theory.

The researchers found that bamboo naturally optimizes the distribution of fibers to give them flexural rigidity in volume. this, we can develop light high strength cylindrical composite by imitating the fiber gradient distribution of bamboo. In recent years, bionics, which simulates the living conditions of animals plants, has solved many problems in the development of new materials.

The toughness of outdoor bamboo will broaden its application range. With the continuous innovation of technology in the future, it's impossible to replace it just now.