摘要
通过改进Voronoi方法建立含有夹杂粒子的2A12铝合金微观晶粒结构模型。将内聚力模型中的位移-驱动力之间的关系嵌入到Voronoi晶界之间进行微观晶粒结构的有限元模型分析,并通过有限元子模型技术,建立微观晶粒结构到宏观结构的跨尺度有限元模型。结果表明:改进的Voronoi方法可较好地模拟铝合金显微组织结构;不同形状(a/b)和位置(θ)的夹杂粒子对脱黏应力有着较大影响。基于微观晶粒结构得出宏观的应力-应变关系曲线,实现高强铝合金材料的跨尺度分析。
Micro scopic grain structure model of 2A12 aluminum alloy with inclusion particles was established by the improved Voronoi method. The relationship between the displacement and driving force for cohesive zone mode（CZM）was embedded into the grain boundary of grain structure. Multiscale finite element model of the grain structure from microstructure to macrostructure was developed by Sub-Finite Element model technology. The results show that the improved Voronoi method can simulate the microstructure of the aluminum alloy. The inclusion particles with different shapes and positions have a great influence on the deboned stress. The macroscopic stress-strain curve was obtained from the micro-grain structure and the multiscale analysis of the high-strength aluminum alloy material was realized.
作者
卞贵学
陈跃良
张勇
王安东
丁文勇
BIAN Guixue CHEN Yueliang ZHANG Yong WANG Andong DING Wenyong(Qingdao Branch, Naval Aeronautical Engineering Institute, Qingdao 266041, China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2017年第2期109-114,共6页
Ordnance Material Science and Engineering
基金
国家自然科学基金(51075394
51375490)
