白萝卜常规力学特性试验  

Experiments of mechanical properties on white radish

作　　者：吕俊龙[1] 杨薇[1] 郭徽[1] 

机构地区：[1]昆明理工大学现代农业工程学院,云南省昆明650500

出　　处：《食品与机械》2015年第4期152-154,共3页Food and Machinery

摘　　要：为了获得白萝卜的力学性质并提供其在采收、运输、储藏及工业生产中必要的理论依据,以加载部位、方向、速度及含水率为影响因素进行试验,分析各因素对白萝卜常规力学特性(应力,弹性模量)的影响。结果表明:白萝卜的中部抗压能力较强、下部较弱(弹性模量分别为2.16,2.07 MPa);白萝卜是各向异性的,且轴向抗压能力比径向的强(弹性模量轴向2.19 MPa、径向1.98 MPa);含水率对弹性模量影响显著,且弹性模量随着含水率降低而增加。因此,白萝卜在运输和储藏过程中,应尽量避免径向受力。In order to obtain mechanical properties and provide neces sary theoretical basis in the harvest, transportation, storage and in dustrial production of the white radish, mechanical properties （stress, elastic modulus） of white radish were measured and ana lyzed. Loading position, the loading direction, loading speed and moisture content were considered as affecting factors on the mechani cal properties of white radish. Results showed that the compression capability of central position of white radish was stronger, and the lower position＇s was weaker （elastic modulus were 2. 16, 2.07 MPa respectively）. White radish was anisotropic. The axial compressive strength was stronger than in radial direction （the elastic modulus of axial and radial directions were 2.19 MPa, 1.98 MPa respectively）. The elastic modulus were increased with reduction of moisture con- tent. So the radial force should he avoided during the transport process of white radish.

关 键 词：白萝卜 应力 弹性模量 

分 类 号：TS255.1[轻工技术与工程—农产品加工及贮藏工程]