Abstract:

Building a nanoatomic model of cube aluminum materials at microscopic level and solving it by using the molecular statics theory and algorithms with the modified Morse potential, the paper demonstrated thermal deformation mechanism of part scientifically and gave the results of macroscopic thermal deformation experiments. The microscopic analysis and macroscopic experiments prove the existence of dissimilarity of mechanical part thermal deformation, making up defects of demonstrating them only by macroscopic experiments and improving the mechanical part thermal deformation theory. Meanwhile, the molecular statics theory was introduced into research on the mechanism of thermal expansion, which expands a new research way of mechanical thermal deformation theory.

Key words: mechanical body, thermal deformation, dissimilarity characteristics, molecular statics

摘要：

在微观层面建立铝材料正方体纳米原子模型，采用结合修正莫斯势能的分子静力学理论和算法,对其进行仿真求解，对形体热变形机理给予了科学的论证，并给出宏观热变形实验结果。微观分析与宏观实验从机理理论和实验两个层面论证了机械形体热变形非相似性特征的客观存在，弥补了机械形体热变形非相似性特征长期局限于实验验证的缺陷,完善了机械形体热变形理论基础。同时，将分子静力学理论引入对热膨胀机理的研究中，拓展了热变形理论研究思路。

关键词: 机械形体, 热变形, 非相似性特征, 分子静力学