棉秆轴向压缩特性的试验研究

采用电子万能试验机对棉秆进行轴向压缩试验研究。结果表明：干棉秆的弹性模量和轴向抗压强度明显高于湿棉秆；直径对棉秆的弹性模量和轴向抗压强度有影响，但无统一变化趋势；弹性模量和轴向抗压强度受节问影响。其平均值在节问2最大，节问5最小，节问3和节问4的值变化很小。

Study on Axial Compression Properties of Cotton Stalks

The experiments on axial compression properties of cotton stalks were conducted to measure the mechanics parameter value by the electron universal testing machine. The results show that the elastic moduli and axial compressive strength of dry cotton stalks are significantly larger than wet ones. Although the diameter of cotton stalks has effect on the elastic moduli and axial compressive strength, it is not possible to discern consistent trends. The study of the effect of stem internode position show that the mean values of the elastic moduli and axial compressive strength of the second stem internode are largest and the mean values of the fifth stem internode are smallest. From the third stem internode to the fourth stem internode, there is no markedly change in mean values of the elastic moduli and axial compressive strength.