苦竹竹材物理力学性质的研究

测试了苦竹竹材的物理力学性质,用回归分析法探讨了竹龄与竹材各项物理力学性质之间的关系,结果表明:竹龄对苦竹竹材的物理力学性质有显著影响;苦竹竹材的径向、弦向、体积干缩系数随竹龄增加逐渐减少;其气干密度、顺纹抗压强度、顺纹抗拉强度和抗弯强度都随竹龄增加而增加,至3~5年较稳定.竹竿由下至上,含水率、干缩性逐渐减少;气干密度逐渐增加,力学强度亦相应提高.

The Physico-mechanical Properties of Pleioblastus amarus Bamboo Wood

The physico-mechanical properties of Pleioblastus amarus wood were determined,and the relationship between the age of bamboo plants and the physico-mechanical properties of the Pleioblastus amarus wood was explored by regressive analyses.It was showed by the results that the bamboo age had a remarkable effect on the wood's physico-mechanical properties. The radial,chord and volume shrinkage coefficients of Pleioblastus amarus bamboo wood decreased gradually with the age increment,whereas the air-dried density,compression strength parallel to the grain,tensile strength parallel to the grain,and the bending strength increased with the age increment,and these indexes seemed to become relatively stable by the age of 3 to 5 years old.It was demonstrated that the moisture content and the desiccation shrinkage coefficient dropped gradually,while the air-dried density and mechanical strength increased correspondingly from the bottom to the top of the bamboo wood