基于感压胶片测量技术的苹果静压接触应力及损伤分析
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(1. 石河子大学机械电气工程学院,新疆 石河子 832003;2. 教育部绿洲特色经济作物生产机械化工程研究中心,新疆 石河子 832003)

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冯哲(1989-),男,石河子大学在读硕士研究生。E-mail:fyzshzu@sina.cn

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国家自然科学基金资助项目(编号:31160335)


Study on contact pressure and mechanical damage of apple under compression using pressure-sensitive film
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(1. College of Mechanical and Electrical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China; 2. Research Center of Oasis Agricultural Mechanization, Ministry of Education, Shihezi, Xinjiang 832003, China)

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    摘要:

    采用Prescale○R感压胶片测量苹果静压接触应力的分布特性,并结合图像处理技术对褐变区域进行精确测量,以明确应力面积与损伤面积之间的关系,了解苹果损伤发生的机制。结果表明,苹果果肉出现酶促褐变损伤的应力为0.29 MPa;0.20~0.40 MPa的应力分布占72%,构成苹果损伤的主要区域;苹果的损伤面积与应力均值无直接关系;应力总面积高出苹果损伤面积9%,只有≥0.10 MPa应力面积最接近苹果损伤面积,用其估测损伤面积的平均误差仅为1.66%,两者之间的关系可表示为A = 0.98AP≥0.10+1.95。

    Abstract:

    In order to accurately predict the bruise area of apple subjected to compressive loading, the pressure distribution characteristics for apple compressed at different loads was investigated by the pressure-sensitive film technique combined with apple bruise measurements. Furthermore, the relationship between contact pressure area and bruise area was investigated and the range of pressure area that closed to the bruise area was determined. The result showed that the value of apple flesh failure stress was 0.29 MPa. Pressure distribution on the pressure-sensitive film showed that pressure of 020~0.40 MPa accounted for 72% of the total pressure area and taken the major proportion of apple bruise area. The average pressure had little influence on the apple bruise. The measured pressure area was up to 9% higher than the actual bruise area. Only the area occupied by the pressure over than 0.10 MPa was much close to the bruise area with 1.66% relative error rate. The linear regression equation between bruise area and pressure area (A=0.98AP≥0.10+195 ) could precise estimate the bruise area of apple under static load.

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引用本文

冯哲,吴杰.基于感压胶片测量技术的苹果静压接触应力及损伤分析[J].食品与机械,2015,31(5):186-189.
FENGZhe, WUJie. Study on contact pressure and mechanical damage of apple under compression using pressure-sensitive film[J]. Food & Machinery,2015,31(5):186-189.

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  • 收稿日期:2015-07-03
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  • 在线发布日期: 2023-03-17
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