典型萝卜力学特性的对比试验研究
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摘要
利用万能试验机对白萝卜和青萝卜进行试验,确定了萝卜皮的拉伸力学特性及萝卜的剪切力学特性,并研究了不同含水率对萝卜力学特性的影响。试验结果表明:含水率对萝卜的力学特性影响比较大。随着含水率的增大,萝卜的抗压性能好,且弹性模量、最大抗压强度及最大载荷逐渐增大;白萝卜皮的抗拉力学特性略大于青萝卜皮,且弹性模量小于萝卜内部;白萝卜与青萝卜的剪切面积与萝卜的最大剪切力呈线性正相关;白萝卜的剪切强度为(0.066±0.024)MPa,青萝卜的剪切强度为(0.082±0.02)MPa,白萝卜的抗剪切能力略小于青萝卜,且萝卜的抗剪切能力远远小于萝卜的抗压能力。
The tensile mechanical properties of radish and the shear mechanical properties of radish were determined by universal testing machine. The effects of different moisture content on the mechanical properties of radish were studied.The results showed that: The moisture content has a great influence on the mechanical properties of radish. With the increase of water content,the better the compressive performance of radish,and the elastic modulus,the maximum compressive strength and the maximum load gradually increase. The tensile strength of white radish skin is slightly larger than that of green radish,and the elastic modulus is less than that of radish. The shear area of white radish and green radish was linearly correlated with the maximum shear force of radish. The shear strength of white radish was( 0. 066 ± 0.024) MPa,the shear strength of green radish was( 0. 082 ± 0. 02) MPa,the shear resistance of white radish was slightly smaller than that of green radish,and the shear resistance of radish was much smaller than that of Radish of the compressive ability.
The tensile mechanical properties of radish and the shear mechanical properties of radish were determined by universal testing machine. The effects of different moisture content on the mechanical properties of radish were studied.The results showed that: The moisture content has a great influence on the mechanical properties of radish. With the increase of water content,the better the compressive performance of radish,and the elastic modulus,the maximum compressive strength and the maximum load gradually increase. The tensile strength of white radish skin is slightly larger than that of green radish,and the elastic modulus is less than that of radish. The shear area of white radish and green radish was linearly correlated with the maximum shear force of radish. The shear strength of white radish was( 0. 066 ± 0.024) MPa,the shear strength of green radish was( 0. 082 ± 0. 02) MPa,the shear resistance of white radish was slightly smaller than that of green radish,and the shear resistance of radish was much smaller than that of Radish of the compressive ability.
引文
[1]高升,王方艳.红心萝卜力学特性试验研究[J].农机化研究,2017,39(8):170-174.
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[2]罗国亮,努尔比燕,王辉霞,等.胡萝卜品种及栽培模式对比试验初报[J].长江蔬菜,2008(16):46-48.
[3]陈海涛,任珂珂,余嘉.北方垄作萝卜物理力学特性[J].农业工程学报,2010(6):163-169.
[4]高升,王方艳,周建强,等.红心萝卜种植农艺及物理力学特性研究[J].中国农机化,2016,37(12):73-77.
[5]张洪霞.加载速度对萝卜力学特性影响的试验研究[J].黑龙江八一农垦大学学报,2003(4):46-49.
[6]李凯锋,杨炳南,杨德秋,等.胡萝卜物理力学特性的试验研究[J].农机化研究,2016,38(5):169-175,180.
[7]高升,王方艳.红心萝卜力学特性试验研究[J].农机化研究,2017,39(8):170-174.
[8]吕俊龙,杨薇,郭徽.白萝卜常规力学特性试验[J].食品与机械,2015(4):152-154.
[9]李耀明,秦同娣,陈进,等.玉米茎秆往复切割力学特性试验与分析[J].农业工程学报,2011,27(1):160-164.
[10]刘庆庭,区颖刚,卿上乐,等.甘蔗茎杆在扭转、压缩、拉伸荷载下的破坏试验[J].农业工程学报,2006,22(6):201-204.
[11]王方艳,张东兴.甜菜力学特性的试验研究[J].农机化研究,2015,37(9):206-210.
[12]廖宜涛,廖庆喜,田波平,等.收割期卢竹底部茎秆机械物理特性参数的试验研究[J].农业工程学报,2007,23(4):124-129.
[13]刘姣娣,曹卫彬,田东洋,等.基于苗钵力学特性的自动移栽机执行机构参数优化试验[J].农业工程学报,2016,32(16):32-39.
[14]刘庆庭,区颖刚,袁纳新.甘蔗茎在弯曲荷载下的破坏[J].农业工程学报,2004,20(3):6-9.
[15]李玉道,杜现军,宋占华,等.棉花秸秆剪切力学性能试验[J].农业工程学报,2011,27(2):124-128.
[16]薛忠,郭向明,黄正明,等.木薯茎秆机械力学特性试验研究[J].中国农机化,2014,35(1):83-87.
[17]闫梅,王涛,李梦林,等.木薯块根切割力学特性研究[J].食品与机械,2013,29(4):88-9.