银杏种核力学特性试验  

Experiment on Mechanical Properties of the Seed Nucleus of Ginkgo biloba

作　　者：王新忠[1] 王敏[1] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部重点实验室

出　　处：《农业机械学报》2008年第8期84-88,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：江苏省自然科学基金资助项目(项目编号:BK2003046)

摘　　要：采用不同加载方向、含水率和载荷类型,通过压缩试验对银杏种核进行了力学特性研究。相同含水率下种核在各个方向上的破碎力不同,在宽度方向上最小,在厚度方向上最大。含水率对种核的压缩破碎影响很大,种核含水率越高核壳与果仁的间隙越小,所需破碎力越小,但果仁允许变形量较大。试验表明,含水率27.66%的银杏在厚度方向的破碎力为(135.82±24.48)N,当控制压缩头到果仁的移动距离在(2.4±0.5)mm,且不超过果仁允许的变形量2.23mm时可以得到完整的果仁。With consideration of several different factors of loading direction, the moisture content and loading type and so on, the mechanical properties of Ginkgo seed nucleus were studied by way of compression test. The crushing forces of Ginkgo seed nucleus were different in each orientation under the same moisture content, which were smallest in width and greatest in thickness, respectively. Moisture content had a significant impact in the compression crash of seed nucleus. The more moisture content was, the less clearance occurred to shell and nutlet, thus crashing easily. The nutlet deformation was expanded while the moisture content of nutlet was high, but the crushing force of nutlet was less. The studies indicate that the crushing force is （135.82 ± 24.48）N when Ginkgo seed nucleus has moisture content of 27.66 %. The intact nutlet will be obtained when the displacement of the compression head toward the nutlet is up to （2.4 ± 0.5）mm while the allowable nutlet deformation of 2.23 mm is not exceeded.

关 键 词：银杏 种核 力学特性 含水率 试验 

分 类 号：S183[农业科学—农业基础科学]