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两种五零能模式材料单胞构型及其性能分析
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Release Time:2019-03-11
Date:
2019-03-11
Indexed by:
Journal Article
Date of Publication:
2015-01-01
Journal:
固体力学学报
Included Journals:
CSCD、ISTIC、PKU、Scopus
Volume:
36
Issue:
4
Page Number:
290-296
ISSN:
0254-7805
Key Words:
五零能模式材料; 声学斗篷材料; 代表体元法; 渐近均匀化法; 等效弹性模量
Abstract:
五零能模式材料是一种新型的人工超材料,虽属于弹性材料,但组成其单胞的特殊构型使其宏观静态表现为仅能承载一种受力状态,动态表现为仅能传播一种弹性波
.论文首先构造了两种五零能模式材料的单胞构型,其具有不同的弹性特性,其中一种材料可传播弹性膨胀波,另一种可传播弹性剪切波.然后分别采用代表体元法
和渐近均匀化法分析这两种单胞的等效弹性模量.五零能模式材料的分析分为两步更直观,开始从单胞桁架模型人手,检验单胞构型是否满足五零能模式的定义,然
后分析单胞实体模型,考察单胞构型的结构参数与其等效弹性模量的关系.研究表明对于这种低密度弹性材料的分析,代表体元法更适合.
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