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纳米晶Ni晶间断裂的数值模拟
Alternative TitleNUMERICAL SIMULATIONS OF THE INTERGRANULAR FRACTURE IN NANOCRYSTALLINE Ni
吴波; 魏悦广; 谭建松; 王建平
Source Publication金属学报=Acta Metallurgica Sinica
2009-09-11
Volume45Issue:9Pages:1077-1082
ISSN0412-1961
Abstract提出了一种针对超细晶和纳米晶金属(主要是fcc金属)晶间断裂的微结构计算模型,即采用基于机制的应变梯度塑性(CMSG)理论描述晶粒内部材料塑性变形过程中的变形、强化和尺度效应;采用黏聚力界面模型来模拟晶界的滑移和分离现象,以及晶间裂纹的萌生和演化,直至晶间断裂导致的材料失效.利用该计算模型模拟了纳米晶Ni的拉伸实验过程,对纳米晶Ni宏观力学行为和晶间微裂纹萌生与扩展之间的关系进行了研究,验证了针对超细晶和纳米晶力学性能的计算模型的有效性;同时,模拟结果表明,非均匀塑性变形导致高应变梯度效应,晶粒塑性变形强化显著,使晶界主导的变形机制对纳米晶金属的整体力学性能产生重要影响.
Keyword纳米晶 晶间断裂 应变梯度塑性 有限元模拟
Subject Area疲劳与断裂力学
Indexed BySCI ; EI ; CSCD
Language中文
WOS IDWOS:000271663400009
WOS KeywordSTRAIN GRADIENT PLASTICITY ; MOLECULAR-DYNAMICS ; FCC METALS ; GRAIN-SIZE ; DEFORMATION
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding Organization国家自然科学基金项目10432050和10721202资助
CSCD IDCSCD:3703087
Contributor吴波
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/33173
Collection非线性力学国家重点实验室
Corresponding Author吴波
Recommended Citation
GB/T 7714
吴波,魏悦广,谭建松,等. 纳米晶Ni晶间断裂的数值模拟[J]. 金属学报=Acta Metallurgica Sinica,2009,45,9,:1077-1082.Rp_Au:吴波
APA 吴波,魏悦广,谭建松,&王建平.(2009).纳米晶Ni晶间断裂的数值模拟.金属学报=Acta Metallurgica Sinica,45(9),1077-1082.
MLA 吴波,et al."纳米晶Ni晶间断裂的数值模拟".金属学报=Acta Metallurgica Sinica 45.9(2009):1077-1082.
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