中文摘要：

文章从微观层面出发，建立铝材料环形纳米原子模型，采用结合修正莫斯势能的分子静力学理论和算法对原子模型的升温热变形过程进行仿真和求解。在此基础上探讨了环形机械形体热变形规律，并进行了宏观热变形实验。从理论和实验对比分析论证了机械零件热变形受形体参数影响是客观存在的。将分子静力学理论引入到对热膨胀机理的研究中，拓展了热变形理论研究思路。

英文摘要：

T he nano‐atomic ring model of aluminum is built on microscopic scale .T he thermal expan‐sion process of the model is simulated and solved by the molecular statics theory and algorithm com‐bined with the modified Morse potential .On this basis ,the thermal deformation regularity of ring me‐chanical part is discussed and the macroscopic thermal deformation experiment is carried out .The mi‐croscopic analysis and macroscopic experiment validate the existence of thermal deformation affected by the characteristic parameters of parts structure .The molecular statics theory is introduced into the research on the mechanism of thermal expansion ,which expands a new way of studying mechanical thermal deformation theory .