论文部分内容阅读
根据葡萄结构特点,以二维问题为研究对象,建立了葡萄力学模型.提出了用数值模拟与实验相结合确定模型力学参数和用线性拟合实验数据确定物体刚度的方法.用有限元方法和MATLAB计算软件研究了葡萄压缩时内压改变量、压缩外力、压缩变形量和皮的应力之间的关系,给出了关系曲线图.得出了葡萄在压缩情况下,总体变形量与压缩外力、内压改变量和皮的应力的关系是非线性关系.但葡萄内压改变量与压缩外力和皮的应力的关系以及皮应力与压缩外力的关系是近似的线性关系.葡萄体积改变量随压缩外力的增加而成线性的增加.葡萄首先在不受力的表皮破裂等5点结论.图6,表2,参8.
According to the characteristics of grapes structure, a two-dimensional problem was taken as the research object, and a grape model was established. A method was proposed to determine the stiffness of the model by combining the numerical simulation with the experimental data and the linear fitting experimental data. MATLAB software to study the relationship between the internal pressure change, the external compression force, the compressive deformation and the skin stress when the grape is squeezed, and gives the curve of the relationship between the total deformation and the compressive force , The relationship between the change of internal pressure and the stress of skin is non-linear, but the relationship between the change of internal pressure of grape and the external force of compression and the stress of skin and the relationship between skin stress and external force of compression are approximate linear relationship.Variation of grape volume change with compression The external force increases linearly with the grapes first in the unstressed epidermis rupture, etc. 5 Conclusion Figure 6, Table 2, reference 8.