Quality of Interfaces in Cu/Al Dissimilar Friction-Stirred Welds

2012 ◽  
Vol 706-709 ◽  
pp. 959-964 ◽  
Author(s):  
Marie Noëlle Avettand-Fènoël ◽  
Roland Taillard ◽  
Gang Ji
Keyword(s):  
Digital Image Correlation ◽  
Tensile Test ◽  
Digital Image ◽  
Pure Copper ◽  
Image Correlation ◽  
Al Alloy ◽  
Welding Defects ◽  
6082 Al Alloy ◽  
Original Approach

The current work focuses on the particular case of dissimilar 6082 Al alloy/pure copper butt-friction stirred joints. It takes advantage of voluntarily non optimized welding conditions in order to test the potential of an original approach of identification of the welding defects by means of a single tensile test. The sequence and mechanism of the fracture events arise from their localization on the fracture surfaces thanks to strain maps obtained by digital image correlation. This technique of flaws identification is proved to be particularly efficient at least with the present highly damaged welds.

Simulation of the Global Response of Welded Joint Using Digital Image Correlation Measurement

2013 ◽  
Vol 749 ◽  
pp. 597-600
Author(s):  
Chao He ◽  
Shi Ming Cui ◽  
Yan Zeng Wu ◽  
Ze Fu Luo ◽  
Qing Yuan Wang
Keyword(s):  
Digital Image Correlation ◽  
Tensile Test ◽  
Tensile Properties ◽  
Digital Image ◽  
Welded Joint ◽  
Pure Aluminum ◽  
Local Stress ◽  
Image Correlation ◽  
Global Response ◽  
Mechanical Heterogeneity

The effect of the mechanical heterogeneity on the global and local tensile properties of laser-arc hybrid welded joints in industrial pure aluminum has been investigated. Digital image correlation method has been used during tensile test for mapping the strain distribution and to determine the local stress-strain curves of FZ and HAZ. The tensile properties of the various regions are very heterogeneous and HAZ is the weakest region because of the strain localizes during tensile test. Finite element technique was used to model the global response of welded joint based on local constitutive properties which could be determined from DIC results.

Study of the quality of wood texture patterns in digital image correlation

Optik ◽  
2018 ◽  
Vol 171 ◽  
pp. 370-376 ◽  
Author(s):  
Xiaomao Zhao ◽  
Yuxin Wen ◽  
Jian Zhao ◽  
Dong Zhao
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Image Correlation

scholarly journals On the Evaluation of Stress Triaxiality Fields in a Notched Titanium Alloy Sample Via Integrated Digital Image Correlation

2015 ◽  
Vol 82 (7) ◽  
Author(s):  
Dominik Lindner ◽  
Florent Mathieu ◽  
François Hild ◽  
Olivier Allix ◽  
Cuong Ha Minh ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Tensile Test ◽  
Digital Image ◽  
Speckle Pattern ◽  
Equivalent Plastic Strain ◽  
Stress Triaxiality ◽  
Numerical Procedure ◽  
Constitutive Law ◽  
Image Correlation ◽  
Alloy Sample

This paper presents a coupled experimental/numerical procedure to evaluate triaxiality fields. Such a type of analysis is applied to a tensile test on a thin notched sample made of Ti 6-4 alloy. The experimental data consist of digital images and corresponding load levels, and a commercial code (abaqus) is used in an integrated approach to digital image correlation (DIC). With the proposed procedure, samples with complex shapes can be analyzed independently without having to resort to other tests to calibrate the material parameters of a given constitutive law to evaluate triaxilities. The regularization involved in the integrated DIC (I-DIC) procedure allows the user to deal with experimental imperfections such as cracking of the paint and/or poor quality of the speckle pattern. For the studied material, different hardening postulates are tested up to a level of equivalent plastic strain about three times higher than those achievable in a tensile test on smooth samples. Different finite element (FE) discretizations and model hypotheses (i.e., 2D plane stress and 3D simulations) are compared.

Tensile Test for Polymer Plastics with Extreme Large Elongation Using Quad-Camera Digital Image Correlation

2016 ◽  
Author(s):  
Xin Xie ◽  
Danielle Zeng ◽  
Junrui Li ◽  
Jeffrey Dahl ◽  
Qiancheng Zhao ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Tensile Test ◽  
Digital Image ◽  
Image Correlation ◽  
Large Elongation

Understanding the effect of weathering on adhesive bonds for wood composites using digital image correlation (DIC)

Holzforschung ◽  
2019 ◽  
Vol 73 (2) ◽  
pp. 155-164 ◽  
Author(s):  
Paige McKinley ◽  
Arijit Sinha ◽  
Frederick A. Kamke
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Failure Load ◽  
Image Correlation ◽  
Wood Composites ◽  
Shear Tests ◽  
Adhesive Bonds ◽  
Shear Moduli ◽  
Lap Shear

Abstract The quality of wood composites is dependent on the bondlines’ performance and their moisture resistance. The effect of moisture intrusion into bondlines is the focus of this study. The strain profile in the bondline during loading was investigated and the effects of weathering on the bondline were quantified by digital image correlation (DIC), while load deflection data were collected from lap-shear tests (LShTs). A total of 75 LShTs were evaluated including four different adhesive types with Douglas-fir wood, out of which 39 served as controls and 36 as substrates for weathering. The effect of weathering on failure load was not statistically significant. Only the bonded surface and adhesive type have significant effects on failure load, as well as the three-way interaction between the bonded surface, adhesive, and weathering, as revealed by three-way analysis of variance (ANOVA). The average effective shear moduli for the weathered samples were significantly lower than those for the control samples.

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