农业工程学报2012，Vol.28Issue(z2)：118-124,7.DOI:10.3969/j.issn.1002-6819.2012.z2.021
棉花幼苗茎秆弯曲及剪切性能试验
Bending and shearing characteristics of cotton seedling stem
摘要
Abstract
In order to analyze and evaluate the resist ability of cotton seedling to wind and sandstorm damage in Xinjiang,China,the bending resistance strength and shearing resistance strength were determined by experiments for cotton stem in its seedling stage rather than maturity period.The bending force and shearing force were measured by using a universal testing machine TMS-PRO with a specialized three-point fixture,and the bending resistance strength and shearing resistance strength were calculated from these data.The experiments were conducted at different stage of cotton seedlings life.The shearing force and bending force of cotton seedling stem increases with the age,but it is not obvious in the first five weeks.The results show that the five weeks old cotton seedlings are still weak against external damage,the maximum bending force that a cotton seedling stem can be suffered is 1.98 N and the maximum shearing force is 101.93 N.After five weeks,these values climb rapidly,and they reach to 68.27 and 622.77 N respectively in the ninth week.关键词
棉花/植株/力学特性/弯曲强度/剪切强度Key words
Cotton/ plants/ mechanical property/ bending resistance strength/ shearing resistance strength分类
农业科技引用本文复制引用
宗望远,黄小毛,徐爱英,范修文,黄新成..棉花幼苗茎秆弯曲及剪切性能试验[J].农业工程学报,2012,28(z2):118-124,7.基金项目
National Natural Science Foundation of China (50875104) （50875104）
