排序方式: 共有4条查询结果,搜索用时 0 毫秒
1
1.
2.
基于对传统双向渐进结构优化(BESO)方法的改进,通过均匀化方法建立微观尺度多相材料布局分布与宏观结构材料弹性张量之间的联系,集成宏观结构所得到的位移场,推导出带有宏观结构力学特性的微观灵敏度。提出以宏观结构最大刚度为目标、对极小尺度周期性排列的材料微结构胞元进行布局优化设计的方法。本文算例结果表明,该方法在微结构多相材料布局优化设计过程中,不仅克服了拓扑优化领域常见的"棋盘格"现象,得到了边界清晰、受力合理的多相材料合理分布布局优化结果,而且整体优化过程稳定,具有很强的工程实际应用价值。 相似文献
3.
在传统双向渐进结构优化(BESO)方法基础上,充分考虑微观尺度和宏观尺度之间的相互耦合作用,通过等效弹性模量和灵敏度分析将复合材料微结构胞元设计和宏观结构拓扑优化相结合,建立周期性复合材料构型及结构一体化优化设计方法.为了消除“灰色区域”,假设了材料微结构0 1属性及在宏观结构空间排列的均一性,提高了优化结果的实际工程适用性.相关算例说明该方法可以有效地在宏观结构优化的同时得到与之相对应的材料微观最佳拓扑形状,也为不同给定宏观结构的微观周期性复合材料设计提供了有效手段. 相似文献
4.
Effect of the potential function and strain rate on mechanical behavior of the single crystal Ni-based alloys: A molecular dynamics study 下载免费PDF全文
Molecular dynamics has been widely used to study the fundamental mechanism of Ni-based superalloys. However, the effect of the potential function and strain rate on mechanical behavior has rarely been mentioned in the previous molecular dynamics studies. In the present work, we show that the potential function of molecular dynamics can dramatically influence the simulation results of single crystal Ni-based superalloys. The microstructure and mechanical behavior of single crystal Ni-based superalloys under four commonly used potential functions are systematically compared. A most suitable potential function for the mechanical deformation is critically selected, and based on it, the role of strain rate on the mechanical deformation is investigated. 相似文献
1