| 雷军乐,王佳,游斌盛,李卓.金桔果实采后压缩过程力学特性分析及模型验证[J].中国南方果树,2026,55(4):12-16 |
| 金桔果实采后压缩过程力学特性分析及模型验证 |
| Analysis of mechanical properties and model verification of compression process of kumquat fruit |
| 投稿时间：2025-06-11 修订日期：2025-07-24 |
| DOI： |
| 中文关键词: 金桔 力学特性 压缩 响应面 有限元分析 |
| 英文关键词:Kumquat mechanical properties Compress response surface finite element analysis |
| 基金项目:国家自然科学[52465026],国家自然科学基金项目（面上项目，重点项目，重大项目） |
|
| 摘要点击次数: 15 |
| 全文下载次数: 0 |
| 中文摘要: |
| 【目的】针对金桔在采运过程中因挤压等外力因素受到的机械损伤问题,该研究进行不同加载条件下的压缩试验,运用有限元分析验证试验结果。【方法】使用电子万能试验机进行压缩试验,通过Box-Behnken原理的正交旋转组合试验分析压缩方向、金桔直径、压缩速率对金桔表面破裂的影响；测量金桔在不同位移下的尺寸变化计算恢复载荷系数,深入研究金桔内部损伤的临界点,使用SolidWorks软件建模,并运用ANSYS软件测试内部损伤。【结果】通过Design-Expert13软件分析得出金桔直径、压缩方向对压缩力影响显著(P<0.05),压缩速率对压缩力影响不显著(P>0.05)。当压缩位移到5mm时,金桔的挤压恢复系数呈现出明显下降的趋势,金桔内部细胞损伤导致表面水分渗出；位移为4mm时,挤压恢复系数为0.75,金桔几乎无损伤。结果表明金桔表面破裂径向压缩需要的压缩力最大,轴向最小；金桔的直径越大,表面破裂需要的力就越大；压缩速度越快,金桔表面破裂所需要的力越小。通过有限元分析获得了金桔在压缩试验下的应力云图,【结论】结果表明：最大应力发生在金桔与上压头直接接触的部分,金桔所受应力随着压缩位移的增大而增大,随着非接触区域距离的增大而减小。因此,为确保金桔在运输过程中不发生损伤,金桔受挤压形变范围应控制在4mm以内,所受外载荷不超过13.325N。试验结果可为新型机械化设备提供参考。 |
| 英文摘要: |
| In view of the mechanical damage caused by external factors such as extrusion during the mining and transportation of kumquats, compression tests were carried out on kumquat under different loading conditions, and finite element analysis was used to verify the test results. The compression test of kumquat was carried out by using an electronic universal testing machine to analyze the load curve of surface rupture of kumquat when it was extruded, and the effects of compression direction, kumquat diameter and compression rate on the surface rupture of kumquat were studied through orthogonal tests. The dimensional change of kumquat under different displacements was measured to calculate the recovery load coefficient, the critical point of internal damage was studied in depth, the kumquat was modeled by SolidWorks software, and the internal damage test was carried out on the kumquat by ANSYS. In the compression test, the force of kumquat rupture is 87.41N in radial compression, 73.64N in oblique compression, and 56.76N in axial compression. In the orthogonal test, the analysis of Design-Expert13 software showed that the diameter and compression direction of kumquat had a significant effect on the compressive force? (P<0.05), but the compression rate had no significant effect on the compressive strength (P>0.05). When the compression displacement is 5 mm, the extrusion recovery coefficient of kumquat shows a significant downward trend, the internal cells of kumquat are damaged, and the surface water exudes. When the displacement is 4mm, the extrusion recovery coefficient is 0.75, and the kumquat is almost undamaged. The radial compression required for the surface fracture of kumquat is the largest, and the axial force is the smallest. The larger the diameter of the kumquat, the greater the force required to crack the surface; The faster the compression, the less force is required to crack the kumquat surface. The stress contour of kumquat under force was obtained by finite element analysis, and the results showed that the maximum stress occurred in the part where the kumquat was in direct contact with the upper indenter, and the farther away the non-contact area, the smaller the stress. Therefore, in order to ensure that the kumquat is not damaged during transportation, the extrusion deformation range of kumquat should be controlled within 4mm, and the external load should not exceed 13.325N. The test results can provide a reference for new mechanized equipment.
Keywords: Kumquat; mechanical properties; Compress; response surface; finite element analysis; |
| 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
