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基于壓痕加載曲線的谷物籽粒硬度性能測定技
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of Grain Hardness Based on Indentation Loading Curve
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    摘要:

    使用500N微機(jī)控制材料試驗機(jī)，利用壓痕加載曲線,，進(jìn)行了用針尖壓入法測定谷物籽粒硬度的試驗研究,，測得豌豆、蠶豆,、大米,、綠豆、小麥,、扁豆以及玉米在不同組成部位,、不同含水率時的硬度值在2～75MPa范圍內(nèi)。研究表明,，試驗加載速度在0.25～2.00mm/s范圍內(nèi),、針尖壓入深度在0.25～1.50mm范圍內(nèi)時對試驗結(jié)果無明顯影響,，而針尖錐度與籽粒硬度存在定量關(guān)系。

    Abstract:

    By using the 500N microcomputer control material testing machine, based on the load-depth curve, the hardness of the grains was experimentally studied adopting needlepoint pressing-in method. The peas, horsebeans, rice, mung beans, wheat, lentils as well as corn at different moisture and component parts were tested and analyzed, with the measured hardness range of 2～75MPa. The research showed that at the loading speed in 0.25～2.00mm/s and depth of indentation in 0.25～1.50mm, no obvious effect appears in the test results. The taper of needlepoint and the value of grain hardness have a quantitative relation in the measurement.

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張鋒偉,趙春花,郭維俊,趙武云,馮永忠,韓正晟.基于壓痕加載曲線的谷物籽粒硬度性能測定技[J].農(nóng)業(yè)機(jī)械學(xué)報,2010,41(4):128-133. of Grain Hardness Based on Indentation Loading Curve[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(4):128-133.

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