What are the characteristics of wood?

Wood has good mechanical properties, but wood is an organic anisotropic material, the mechanical properties of the direction of grain and transverse grain are very different. The longitudinal tensile and compressive strength of wood is higher, but the transverse tensile and compressive strength is lower.

Wood strength also varies with species, and is affected by wood defects, loading time, water content and temperature, among which wood defects and loading time have the greatest influence. The strength of jointed wood can be reduced by 30 ~ 60% than that of jointed wood due to the different size and location of jointed wood and the different mechanical properties (pulling or pressing). The long-term strength of wood under long-term loading is almost half of the instantaneous strength.

Wood is a general term for plant tissues that develop inward from the vascular cambium, including xylem and thin-walled rays. Wood plays a great role in supporting human life. Depending on the nature and characteristics of the wood, people use them in different ways.

Wood can be divided into coniferous wood and broadleaf wood two categories. Fir and all kinds of pine, spruce and fir are conifers; Tussah, ash willow, camphor, Sassafras and a variety of birch, nanmu and poplar are broadleaf trees.

China has a large number of tree species, so the wood species commonly used in engineering vary from region to region. In northeast China, there are mainly red pine, larch (yellow flower pine), fish scale spruce, red bark spruce, aspergillus wattles. The Yangtze River basin mainly has Chinese fir, masson's pine; Southwest, northwest areas mainly have fir, spruce, hemlock.

What is wood

Wood generally refers to the wooden materials used in civil construction, usually soft wood and hard wood. The wood used in the project was mainly taken from the trunk of the tree. Easy to obtain and process, wood has been a major building material since ancient times.

Wood can be divided into conifer wood and broadleaf wood two categories of fir and pine, spruce and fir are conifer wood; Tussah, ash willow, camphor, Sassafras and a variety of birch, nanmu and poplar are broadleaf trees. Chinese fir

In short, wood is a general term for plant tissues that develop inward from the vascular cambium, including xylem and thin-walled rays. Wood plays a great role in supporting human life. Depending on the nature and characteristics of the wood, people use them in different ways.