油杉木材物理力学性质研究

Physico-mechanical Properties of Keteleeria fortunei Wood

对油杉Keteleeria fortunei木材的物理与力学性质进行测定与比较,结果表明,油杉木材的气干密度为0.576 g·cm^(-3),全干密度为0.544 g·cm^(-3),属中密度木材。油杉木材的气干径向、弦向和体积干缩系数分别为4.408%、3.272%和7.892%,气干差异干缩为1.347,油杉木材具有不易开裂和变形的特征。油杉木材的抗弯强度、顺纹抗压强度分别为92.701、57.217 Mpa,端面、弦面和径面硬度分别为4635.9、3420.8和3606.8 N,其抗弯强度、顺纹抗压强度和硬度均属中等。50年生油杉木材的物理力学性质优于22年生马尾松Pinus massoniana、湿地松Pinus elliottii和28年生杉木Cunninghamia lanceolata、秃杉Taiwania cryptomerioides。

The wood physical and mechanical properties of Keteleeria fortunei were determined and compared.The results showed that air-dried density and oven-dry density of the wood were0.576g·cm-3and0.544g·cm-3,respectively,which indicated that K.fortunei was medium density wood.The radial,tangential and volume shrinkage coefficients were4.408%,3.272%and7.892%,respectively.And the difference of dry shrinkage was1.347.The wood of K.fortunei was not easy to crack and deformation characteristics.The bending strength,compression strength parallel to grain,the tangential surface,the radial surface and the surface hardness of K.fortunei wood were92.701Mpa,57.217Mpa,4635.9N,3420.8N and3606.8N,respectively.The bending strength,compression strength parallel to grain and hardness were all medium.The wood physical and mechanical properties of50years old K.fortunei was better than those of22year old Pinus massoniana and Pinus elliottii,28years old Cunninghamia lanceolata and Taiwania cryptomerioides.