密度与含水率双因素作用下重组竹顺纹弹性模量的预测与分析OA北大核心CSTPCD

In this study,bamboo scrimber specimens with three densities(1.10,1.20,1.30 g/cm3)and five moisture contents(4%,8%,12%,16%,20%)were tested for tensile and compressive elastic modulus parallel to grain.The changes of tensile and compressive elastic modulus parallel to the grain of bamboo scrimber under different densities and moisture contents were analyzed.The results showed that the tensile and compressive elastic modulus parallel to the grain of bamboo scrimbers increased with the increase of density.When the moisture contents increase,the tensile and compressive elastic modulus parallel to the grain decrease and then become balanced eventually.Through experiment research and data fitting,a two-parameter coupling model of tensile and compressive elastic modulus of bamboo scrimber was proposed.Both the linear combination model and the ASTM combination model can well predict the theoretical values of tensile and compressive elastic modulus of bamboo scrimber with changes in density and moisture content.The maximum errors between the measured values and the predicted values of tensile and compressive elastic modulus parallel to grain were 5.28%,8.20%for the linear combination model,and 8.91%,8.67%for the ASTM combination model,respectively.The linear combination model is recommended due to its effective calculation process in practical applications.