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| Mechanical properties of walnut and damage of its kernel pellicle under compression load |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240502 |
| KeyWord:walnut walnut kernel compression mechanical property kernel pellicle damage |
| FundProject:新疆维吾尔自治区自然科学基金杰出青年科学基金项目（2022E01E61）;新疆维吾尔自治区中央引导地方项目（ZYYD2024CG21）；国家自然科学基金（52465034） |
| Author Name | Affiliation | | ZHU Zhanjiang1, QU Shuhe1,2, MAO Wulan1, YANG Liling1,
MAIHEMUJIANG·Batuer1, SHEN Xiaohe1 | 1.Institute of Agricultural Equipment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091,China
2.College of Energy and Control Engineering,Changji University, Changji 831100, Xingjiang, China |
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| Abstract: |
| In order to provide a reference for reducing the damage of walnut kernel pellicle during mechanical shelling, uniaxial compression tests were conducted on whole walnuts (in-shell) and walnut half-kernels under different loading directions and speeds to investigate their force-bearing behaviors and kernel pellicle damage under various loading conditions. The results showed that the loading direction significantly influenced the peak compression load and kernel pellicle damage area for both whole walnuts and walnut half-kernels. Specifically, for whole walnuts, the peak load required when compressed along the longitudinal diameter direction was markedly higher than that along the rib diameter or transverse diameter directions. For walnut half-kernels, the peak load under compression along the thickness direction was significantly greater than that along the length or width directions. Compression along the transverse diameter direction of whole walnuts caused substantially less kernel pellicle damage compared to the longitudinal and rib diameter directions.The smallest kernel pellicle damage area occurred when compressing the front region of the half-kernels along its thickness direction. In conclusion, during actual production, force should be applied to whole walnuts along the transverse diameter direction as much as possible to minimize kernel pellicle damage. |
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