IMECH-IR  > 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.1; Zhao, J.2; Zhou, J.3; Yang, Y.4; 黄先富.5,6; Liu, Z.1
Corresponding AuthorLiu, Z.(liuzw@bit.edu.cn)
Source PublicationEXPERIMENTAL TECHNIQUES
2022-08-18
Pages15
ISSN0732-8818
AbstractThe 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.
KeywordStir friction welding DIC method Automatic partition Parameter inversion Plasticity theory
DOI10.1007/s40799-022-00608-y
Indexed BySCI ; EI
Language英语
WOS IDWOS:000847194900001
WOS KeywordALLOY ; MICROSTRUCTURE ; IDENTIFICATION ; MICROHARDNESS ; PARAMETERS ; STEEL
WOS Research AreaEngineering ; Mechanics ; Materials Science
WOS SubjectEngineering, Mechanical ; Mechanics ; Materials Science, Characterization & Testing
Funding ProjectNational Natural Science Foundation of China[11972084] ; National Science and Technology Major Project[2017-VI-0003-0073] ; Beijing National Science Foundation[1192014]
Funding OrganizationNational Natural Science Foundation of China ; National Science and Technology Major Project ; Beijing National Science Foundation
ClassificationQ4
Ranking3+
ContributorLiu, Z.
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/89998
Collection非线性力学国家重点实验室
Affiliation1.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China;
2.Inst Flexible Elect Technol Tsinghua, Jiaxing 314006, Zhejiang, Peoples R China;
3.Beijing Inst Struct & Environm Engn, Beijing 100076, Peoples R China;
4.AECC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China;
5.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China;
6.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
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.
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