木薯力学特性测试

木薯力学特性参数的研究，对木薯收获机械的设计、动力学仿真、数学模型建立具有重要意义。采用物理试验方法，利用中国科学院长春科新试验仪器研究所生产的WDW3100微机控制电子万能实验机，测定了华南205木薯块根、茎秆物理力学特性参数，且对数据进行了数理统计分析，结果表明，木薯块根可视为一各向同性材料，其平均轴向拉伸强度、轴向压缩强度、径向压缩强度、轴向剪切强度、径向剪切强度、抗弯强度、轴向弹性模量、径向弹性模量分别为：0.34、0.74、0.76、0.22、0.37、2.66、7.23、7.22 MPa；木薯茎秆为一各向异性材料，其平均轴向拉伸强度、轴向压缩强度、径向压缩强度、轴向剪切强度、径向剪切强度、抗弯强度、轴向弹性模量、径向弹性模量分别为：10.23、6.26、1.43、1.86、2.53、10.80、5.24、35.36 MPa。

Experiment on mechanical properties of cassava

The parameters of cassava mechanical properties are very important for the design, dynamic simulation and mathematical model of cassava harvester. Mechanical properties of cassava root and stem (South China 205) were tested experimentally by WDW3100 universal materials test machine. The data were analyzed by mathematical statistical analysis method. The results showed that cassava root could be considered as isotropic material. The average of root axial tensile strength, axial compression strength, radial compression strength, axial shear strength, radial shear strength, strength , axial elastic modulus and radial elastic modulus are 0.34, 0.74, 0.76, 0.22, 0.37, 2.66, 7.23, 7.22 MPa, respectively. Cassava stem could be considered as anisotropy material. The average of stem axial tensile strength, axial compression strength, radial compression strength, axial shear strength, radial shear strength, bending strength, axial elastic modulus and radial elastic modulus are 10.23, 6.26, 1.43, 1.86, 2.53, 10.80, 5.24, 35.36 MPa, respectively.