摘要
针对环境作用下金属表面容易形成坑蚀而致使结构性能退化这一问题.采用元胞自动机方法,建立描述腐蚀环境中金属表面坑蚀形成及演化的三维模型,对不同腐蚀溶液浓度和温度条件下结构表面蚀坑随时间的变化过程进行了模拟,为定量评估服役环境中结构的剩余强度及寿命提供可能.
Under the service environment, because of chemical and electro-chemical reactions between the surrounding medium and the material elements, local corrosions are easy to form on the surface of metal. The corrosion damage will degrade the useful properties of materials and weaken the strength of the structures. In order to better understand the local corrosion damage degradation process, a numerical model based on the cellular automata method for the three-dimensional simulation of the metal corrosion damage is developed In a mesoscopic scale, the single-pit corrosion and the multi-pit corrosion on the surfaces of metal are simulated under different electrolyte concentrations and temperatures. The result provides a theoretical reference for studying the degradation mechanism of metal structures under the service environment.
出处
《力学与实践》
北大核心
2014年第4期447-452,共6页
Mechanics in Engineering
基金
国家自然科学基金(11262018
10962007)
宁夏自然科学基金(NZ1027)资助项目
关键词
金属
局部腐蚀
三维元胞自动机
模拟
metal, local corrosion, three-dimensional cellular automata, simulation
