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| 无患子的压缩力学特性试验及有限元分析 |
| Compression mechanical properties test and finite element analysis of Sapindus mukorossi |
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| DOI： |
| 中文关键词: 无患子 破壳 弹性模量 力学特性 有限元分析 |
| 英文关键词:Sapindus mukorossi shell breaking elastic modulus mechanical property finite element analysis |
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| 中文摘要: |
| 为了提高无患子果壳破壳率，研究了无患子果壳破壳力学特性。首先在电子万能试验机上进行整果压缩试验，然后运用有限元法对无患子果壳的3个受力方向进行应力与应变分析。结果表明：无患子水平向、侧向、垂向的平均破壳力分别为122.08、95.13、157.24 N，弹性模量分别为49.62、40.27、50.16 MPa，平均变形率分别为13.1%、9.5%、11.4%；受力方向对破壳力、弹性模量的影响极显著；无患子果壳是各向异性的，垂向的抗压能力最强，水平向次之，侧向最小；在水平向和垂向受压时，屈服强度和变形量较大，在侧向受压时较小；有限元仿真结果与试验结果基本一致，说明所建立的仿真力学模型可以用来分析研究无患子果壳的力学特性，为无患子破壳机的设计提供了理论基础和仿真优化方法。 |
| 英文摘要: |
| In order to improve the breaking rate of Sapindus mukorossi nutshell, the breaking mechanical properties of Sapindus mukorossi nutshell was studied. The compression test of whole fruit was carried out on the electronic universal testing machine, then finite element method was applied to analyze the stress and the strain of the three forced directions of nutshell. The results showed that the average shell breaking force of Sapindus mukorossi were 122.08, 95.13, 157.24 N, elastic modulus were 49.62, 40.27, 5016 MPa, and average deformation rate were 13.1%, 9.5% and 11.4% respectively in the horizontal, lateral and vertical directions. The effects of forced direction on shell breaking force and elastic modulus were extremely significant, and Sapindus mukorossi nutshell was anisotropic, with the strongest compression capacity of vertical direction, followed by that of horizontal direction, and the minimal one of lateral direction. The yield strength and deformation amount were larger in the horizontal and vertical directions and they were smaller in the lateral direction. Simulation result of finite element analysis was basically consistent with the experimental result, and it was illustrated that the established mechanical model could be used to analyze the mechanical properties of Sapindus mukorossi nutshell, providing theoretical basis and simulation optimization method for the design of shell breaking machine. |
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