Local-Micro-Zone-Wise Time-Resolved Integrated Digital Image Correlation for Evaluating the Mechanical Properties of Welding Joints

doi:10.1007/s40799-022-00608-y

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Local-Micro-Zone-Wise Time-Resolved Integrated Digital Image Correlation for Evaluating the Mechanical Properties of Welding Joints
	Li, Y.6; Zhao, J.5; Zhou, J.4; Yang, Y.3; 黄先富.1,2; Liu, Z.6
刊名	EXPERIMENTAL TECHNIQUES
	2022-08-18
页码	15
关键词	Stir friction welding DIC method Automatic partition Parameter inversion Plasticity theory
ISSN号	0732-8818
DOI	10.1007/s40799-022-00608-y
通讯作者	Liu, Z.(liuzw@bit.edu.cn)
英文摘要	The comprehensive determination of mechanical properties of heterogeneous objects such as welding joint remains challenging in various scientific fields. This paper develops a Local-micro-zone-wise Time-resolved Integrated Digital Image Correlation (LTIDIC) method, which can self-divide different regions of the material and get the multiple elastic-plastic parameters of each region through parameter inversion simultaneously, including elastic modulus, yield strength, hardening coefficient, and hardening exponent. First, the principle and process of the LTIDIC method are demonstrated, and the method of automatically dividing regions is introduced. Then, the reliability of the LTIDIC is analyzed and optimized, based on evaluating the influence of the correlation criteria, the area size, the noise type, and the number of pictures on the results of parameter inversion. Finally, a uniaxial tensile test was performed on the friction stir welding joint of aluminum alloy 6061T6 thin plate sample, and the distribution of multiple mechanical parameters was measured by the LTIDIC method. The results show that the modulus in the weld zone ranges between 30 and 70 GPa, with the lowest modulus in the thermo-mechanical affected zone and the highest modulus in the heat affected zone. The yield strength in the weld zone ranged from 75-115 MPa. The elastic modulus distribution shows an asymmetric W-shape, and the plastic parameters generally show a decreasing trend from the weld nugget to both sides. The feasibility and accuracy of the LTIDIC method were verified by comparing the consistency with the localized DIC method. The proposed method can obtain multiple elastic-plastic parameter distributions in different areas of material simultaneously through a single tensile experiment and provide important experimental data for the evaluation of mechanical properties of heterogeneous materials similar to welding joints.
分类号	Q4
资助项目	National Natural Science Foundation of China[11972084] ; National Science and Technology Major Project[2017-VI-0003-0073] ; Beijing National Science Foundation[1192014]
WOS关键词	ALLOY ; MICROSTRUCTURE ; IDENTIFICATION ; MICROHARDNESS ; PARAMETERS ; STEEL
WOS研究方向	Engineering ; Mechanics ; Materials Science
语种	英语
WOS记录号	WOS:000847194900001
资助机构	National Natural Science Foundation of China ; National Science and Technology Major Project ; Beijing National Science Foundation
其他责任者	Liu, Z.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89997]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China; 3.AECC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China; 4.Beijing Inst Struct & Environm Engn, Beijing 100076, Peoples R China; 5.Inst Flexible Elect Technol Tsinghua, Jiaxing 314006, Zhejiang, Peoples R China; 6.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China;
推荐引用方式 GB/T 7714	Li, Y.,Zhao, J.,Zhou, J.,et al. Local-Micro-Zone-Wise Time-Resolved Integrated Digital Image Correlation for Evaluating the Mechanical Properties of Welding Joints[J]. EXPERIMENTAL TECHNIQUES,2022:15.
APA	Li, Y.,Zhao, J.,Zhou, J.,Yang, Y.,黄先富.,&Liu, Z..(2022).Local-Micro-Zone-Wise Time-Resolved Integrated Digital Image Correlation for Evaluating the Mechanical Properties of Welding Joints.EXPERIMENTAL TECHNIQUES,15.
MLA	Li, Y.,et al."Local-Micro-Zone-Wise Time-Resolved Integrated Digital Image Correlation for Evaluating the Mechanical Properties of Welding Joints".EXPERIMENTAL TECHNIQUES (2022):15.