Micropillar compression using discrete dislocation dynamics and machine learning

doi:10.1016/j.taml.2023.100484

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	Micropillar compression using discrete dislocation dynamics and machine learning
	Tao, Jin ; Wei DA(魏德安); Yu, Junshi ; Kan, Qianhua ; Kang, Guozheng ; Zhang, Xu
发表期刊	THEORETICAL AND APPLIED MECHANICS LETTERS
	2024-01
卷号	14 期号:1 页码:100484
ISSN	2095-0349
摘要	Discrete dislocation dynamics (DDD) simulations reveal the evolution of dislocation structures and the interaction of dislocations. This study investigated the compression behavior of single-crystal copper micropillars using few-shot machine learning with data provided by DDD simulations. Two types of features are considered: external features comprising specimen size and loading orientation and internal features involving dislocation source length, Schmid factor, the orientation of the most easily activated dislocations and their distance from the free boundary. The yielding stress and stress-strain curves of single-crystal copper micropillar are predicted well by incorporating both external and internal features of the sample as separate or combined inputs. It is found that the Machine learning accuracy predictions for single-crystal micropillar compression can be improved by incorporating easily activated dislocation features with external features. However, the effect of easily activated dislocation on yielding is less important compared to the effects of specimen size and Schmid factor which includes information of orientation but becomes more evident in small-sized micropillars. Overall, incorporating internal features, especially the information of most easily activated dislocations, improves predictive capabilities across diverse sample sizes and orientations.
关键词	Discrete dislocation dynamics simulations Machine learning Size effects Orientation effects Microstructural features
DOI	10.1016/j.taml.2023.100484
收录类别	CSCD
语种	英语
WOS研究方向	Mechanics
项目资助者	National Natural Science Foundation of China [12192214, 12222209]
论文分区	二类
力学所作者排名	2
RpAuthor	Zhang, X (corresponding author), Southwest Jiaotong Univ, Sch Mech & Aerosp Engn, Chengdu 610031, Peoples R China.
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/93684
专题	非线性力学国家重点实验室
作者单位	1.Southwest Jiaotong Univ, Sch Mech & Aerosp Engn, Chengdu 610031, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Tao, Jin,Wei DA,Yu, Junshi,et al. Micropillar compression using discrete dislocation dynamics and machine learning[J]. THEORETICAL AND APPLIED MECHANICS LETTERS,2024,14,1,:100484.
APA	Tao, Jin,魏德安,Yu, Junshi,Kan, Qianhua,Kang, Guozheng,&Zhang, Xu.(2024).Micropillar compression using discrete dislocation dynamics and machine learning.THEORETICAL AND APPLIED MECHANICS LETTERS,14(1),100484.
MLA	Tao, Jin,et al."Micropillar compression using discrete dislocation dynamics and machine learning".THEORETICAL AND APPLIED MECHANICS LETTERS 14.1(2024):100484.

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