基于悬空压裂法的油菜角果抗裂角力测试试验

为寻求出油菜角果不易炸裂的优良品种,在分析已有油菜角果抗裂角力测试方法优缺点的基础上,采用悬空压裂法在WDW-300型万能试验机上对不同品种油菜角果的抗裂角力进行了试验研究,分析油菜品种、角果大小、角果含水率、角果成熟度等因素对油菜角果抗裂角力的影响。结果表明:加载速度为10 mm/min时,载荷随位移的增加先迅速上升,在得到一个峰值力后瞬间下降,呈曲线变化状态,峰值即为角果的抗裂角力。试验测得了28个品种油菜角果抗裂角力范围为0.898～3.035 N,同一品种的油菜角果含水率越高,角果尺寸越小时抗裂角力越小。油菜角果大小差异明显时,同一品种角果尺寸大其抗裂角力大;品种相同含水率不同时,含水率大的角果抗裂角力大。该试验也为研究油菜角果抗裂角力提供了一种新的测定方法,操作简单、快捷。

Experiment on strength of rapeseed pod dehiscence based on impending fracturing method

For exploring the pod not easy to burst, on the basis of advantages and disadvantages of the existing test method of the strength of rapeseed pod dehiscence, experiment on the strength of different varieties of rapeseed pod dehiscence based on the impending fracturing rape pod method in WDW-type 300 was conducted, and effects of rapeseed varieties, pod size, pod moisture content, pod maturity on the strength of dehiscence were analyzed. The results showed that the load was expressed in a single peak curve with the peak of the strength of rapeseed pod dehiscence as the displacement increased when the loading speed was 10 mm/min. The strength of 28 varieties of rapeseed pod dehiscence was between the range of 0.898-3.035 N. The higher moisture content of the same kind of rape pod, the smaller the strength of rapeseed pod dehiscence when the rapeseed pod is smaller. When the rape pod had significant difference in the size, the strength of rapeseed pod dehiscence increased with the increasing pods size. When the varieties of the rapeseed pod dehiscence is the same, the strength of rapeseed pod dehiscence increased with the increasing moisture. This research provides a new method for measuring the strength of rapeseed pod dehiscence easy and fast.