基于粗晶分子动力学模型的多层级骨骼类材料优化设计
发布时间：2018-07-31 10:59
【摘要】：本文采用基于熔丝模型的大规模高效粗晶分子动力学模型,以结构韧性为目标函数自下而上构建具有不同层级数目的优化骨骼类复合材料.以软基质材料和硬质材料构成的标准错列结构为基本单元,通过计算该单元在不同长细比硬质材料下的韧性来确定该层级的最优构型,并以此最优构型为硬质材料来计算确定更高层级的最优构型.通过对拥有一个,两个以及三个层级的骨骼类复合材料进行自下而上式优化设计,结果表明自下而上优化设计的具有不同层级数的骨骼类复合材料的韧性随着总层级数目的增加而提高.特别的,计算得到的拥有两个层级结构的优化骨骼类复合材料的层级间应变比与实验测量结果吻合良好.
[Abstract]:In this paper, a large scale and high efficient coarse grain molecular dynamics model based on the fuse model is used to construct the optimized bone composite material with different levels of magnitude with the structure toughness as the target function. The standard column structure composed of soft matrix material and hard material is the basic single element. By calculating the unit in different length and thin ratio. The toughness of the material is used to determine the optimal configuration of the level, and the optimal configuration is taken as the hard material to determine the optimal configuration of the higher level. The optimization design of the skeleton class composite with one, two and three levels is designed. The results show that the optimization design of the bottom up has different levels of series. The toughness of the bone composite material increases with the increase of the total layer series. In particular, the calculated strain ratio of the optimized skeleton composite with two layers is in good agreement with the experimental results.
【作者单位】： 同济大学航空航天与力学学院;
【分类号】：R318.08;TB33
本文编号：2155375
[Abstract]:In this paper, a large scale and high efficient coarse grain molecular dynamics model based on the fuse model is used to construct the optimized bone composite material with different levels of magnitude with the structure toughness as the target function. The standard column structure composed of soft matrix material and hard material is the basic single element. By calculating the unit in different length and thin ratio. The toughness of the material is used to determine the optimal configuration of the level, and the optimal configuration is taken as the hard material to determine the optimal configuration of the higher level. The optimization design of the skeleton class composite with one, two and three levels is designed. The results show that the optimization design of the bottom up has different levels of series. The toughness of the bone composite material increases with the increase of the total layer series. In particular, the calculated strain ratio of the optimized skeleton composite with two layers is in good agreement with the experimental results.
【作者单位】： 同济大学航空航天与力学学院;
【分类号】：R318.08;TB33
【相似文献】
相关期刊论文 前10条
1 刘立忠,颜金科,陈刚;铝型材粗晶原因浅析[J];轻合金加工技术;1999年04期
2 欧蓉;;浅析高温螺栓钢20Cr1Mo1VNbTiB粗晶现象及其控制[J];特钢技术;2005年02期
3 何宪峰,石建华;优质粗晶WC碳化工艺研究[J];稀有金属快报;2005年10期
4 宋学全,马英利;W9Mo3Cr4V钢入厂原材淬火粗晶的试验与分析[J];工具技术;1994年02期
5 金益民;;粗晶碳化钨粒度对WC-Co合金晶粒度的影响[J];硬质合金;2012年01期
6 徐海卫;于洋;王畅;王林;李飞;关建东;;LCAK钢表层粗晶缺陷的产生原因及机理研究[J];轧钢;2014年01期
7 赵杰;郭淑娟;张秀丽;;马氏体气阀钢粗晶问题探讨与实践[J];科学技术与工程;2012年11期
8 魏文光;孙宝正;陈鸿业;;中温螺栓钢20Cr1Mo1VNbTiB粗晶的本质及其晶粒遗传机理探讨[J];四川冶金;1989年03期
9 朱云辉;;1Cr18Ni9Ti铁素体和探伤超标的解决途径[J];特钢技术;2012年02期
10 杨春雨;气阀钢4Cr10Si2Mo断口粗晶问题的分析[J];辽宁高职学报;2000年03期
相关硕士学位论文 前1条
1 黄新;优质粗晶WC粉末及合金的研制[D];重庆大学;2004年
，本文编号：2155375
本文链接：https://www.wllwen.com/yixuelunwen/swyx/2155375.html
