苹果枝条剪切力学特性研究

Study on Mechanical Properties of Apple Branches

以新疆农垦科学院试验田的苹果枝条作为试验材料,15 mm/min的加载速度,在万能试验机上对3个批次苹果枝条试样进行剪切力学特性分析。对不同直径、含水率的苹果枝条进行剪切力学特性试验。结果表明:峰值剪切力随直径的增大而增大,影响苹果枝条破坏载荷的关键因素在于直径的大小。苹果试样的峰值剪切力随含水率先增加后减小,并且随着剪切位移的变化趋势也是先增大后减小,在剪切位移大于19 mm时,试样基本断裂,剪切力逐渐减小。

Using the apple branches from the experimental field of Xinjiang Academy of Agricultural Reclamation as test materials,the shearing mechanical properties of three batches of apple branches were analyzed on a universal testing machine with a loading speed of 15 mm/min.Shear mechanical properties of apple shoots with different diameters and different water contents were studied.The test results showed that the peak shear force increased with the increase of diameter,and the key factor affecting the failure load of apple branches was the diameter.The peak shear force of the apple pattern increased first and then decreased with the water content,and the trend of the shear displacement increased first and then decreased.When the shear displacement was greater than 19 mm,the pattern was basically broken and the shear force gradually reduced.