基于元胞自动机法的晶间腐蚀仿真建模  

Simulation Modeling of Intergranular Corrosion Based on CA Method

作　　者：唐靖 李广耀 TANG Jing;LI Guangyao(AVIC Chengdu Aircraft Industrial(Group)Co.,Ltd.,Chengdu 610092,China)

机构地区：[1]航空工业成都飞机工业(集团)有限责任公司,四川成都610092

出　　处：《成都大学学报（自然科学版）》2022年第3期287-294,共8页Journal of Chengdu University（Natural Science Edition）

摘　　要：根据元胞自动机法的构成和原理,编写Python程序,实现腐蚀物理过程到数学演化过程的转化.基于金属腐蚀的基本原理,改进均匀腐蚀的元胞自动机模型.根据金属结晶理论,将均匀的金属体改成不均匀金属体.根据腐蚀电化学机理,将腐蚀概率表示成与电极平衡电位、溶液浓度、p H值相关的函数.将溶液中腐蚀性粒子的简单跳转改进成与浓度梯度、扩散系数有关的扩散过程,实现有晶粒组织结构及夹杂等的金属体腐蚀模拟.模拟结果表明,建立的元胞自动机模拟腐蚀方法是合理的,其分析方法和结果能为飞机结构金属腐蚀研究提供依据.According to the composition and principle of the cellular automata( CA) method,this paper writes a Python program to convert the physical process of corrosion into a mathematical evolution process. Based on the basic principle of metal corrosion,the cellular automata model of uniform corrosion is improved;according to the theory of metal crystallization,the uniform metal body is changed into a nonuniform metal body;according to the electrochemical mechanism of corrosion,the corrosion probability is expressed as the equilibrium potential with the electrode,the solution function related to concentration and pH value;the simple jump of corrosive particles in the solution has improved into a diffusion process related to concentration gradient and diffusion coefficient,and the corrosion simulation of metal body such as grain structure and inclusions is realized. The simulation results show that the rationality of the cellular automata corrosion simulation method established in this paper is verified,and the analysis method and results can provide a basis for the study of aircraft metal corrosion.

关 键 词：航空材料 元胞自动机 腐蚀 PYTHON 

分 类 号：TP391.92[自动化与计算机技术—计算机应用技术] V252[自动化与计算机技术—计算机科学与技术]