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| Experimental study on dynamic shear characteristics of soybean under temperature effect |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240117 |
| KeyWord:temperature-controlled direct shear apparatus soybean grain group cyclic shearing temperature initial moisture content |
| FundProject:河南省科技研发计划联合基金项目（222103810075）；河南工业大学创新基金支持计划专项资助（2022ZKCJ07）；河南省高等教育教学改革研究与实践重点项目（2021SJGLX144）；河南工业大学教育教学改革研究与实践重点项目（JXYJ2021006） |
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| Abstract: |
| To obtain the dynamic shear characteristics of soybean grain group under temperature effect and provide theoretical basis for the structural design of granary, the cyclic shear test of soybean grain group was carried out by using grain temperature-controlled static and dynamic direct shear apparatus. The effects of temperature (25, 35, 45 ℃) and initial moisture content (8.99%, 12.24%, 15.12%) on the dynamic shear strength characteristics of soybean were studied, and the cyclic shear dynamic parameters of soybean grain group were analyzed. The results showed that under the condition of initial moisture content of 8.99%, when the temperature of soybean grain group increased from 25 ℃ to 35 ℃ and 45 ℃, the peak shear stress corresponding to the completion of cyclic shear decreased by 2.28% and 5.28%, respectively. At 45 ℃, when the initial moisture content of soybean grain group increased from 8.89% to 12.24% and 15.12%, the corresponding peak shear stress increased by 8.44% and -22.91%, respectively. With the increase of temperature and initial moisture content, the shear shrinkage of soybean grain group increased. With the increase of initial moisture content, the shear stiffness of soybean grain group increased first and then decreased, while the shear stiffness of soybean grain group decreased monotonously with the increase of temperature. With the increase of initial moisture content and temperature, the damping ratio of soybean grain group showed a decreasing trend. In summary, when storing soybean seeds, the integrity of the seeds can be protected by controlling the temperature and humidity of the storage environment. |
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