斜接竹材的工艺与力学性能

Bamboo Scarf-Jointing Technology and Mechanical Properties of Jointed Samples

斜接是高效利用竹材、并可保持接长竹材强度的一种加工方式。在理论分析竹材的最佳斜接角度的基础上,探究竹材的斜接工艺,并对比分析斜接竹材与指接竹材的力学性能。结果表明:1)采用聚氨酯胶,在常温环境、1.2MPa压力下,斜接竹材可获得最大的拉伸强度;2)斜接角度为3.81°时,斜接竹材的拉伸强度与抗弯强度,明显高于5.71°斜接竹材与指接竹材。

Based on optimal scarf joint angle, the authors conducted a series of experiments to evaluate scarf joint angle and pressure on mechanical properties of jointed bamboo. Results showed that： 1） the highest tensile strength of the jointed bamboo was achieved with polyurethane adhesive under room conditions and 1.2 MPa joint pressure; 2） The tensile strength and bending strength of scarf jointed bamboo at an angle of 3.81° were higher than those at an angle of 5.71° and finger jointed bamboo.