Using digital image correlation to automate the measurement of crack length and fracture energy in the mode I testing of structural adhesive joints

2021 ◽  
pp. 107957
Author(s):  
Fengzhen Sun ◽  
Bamber R.K. Blackman
Keyword(s):  
Digital Image Correlation ◽  
Crack Length ◽  
Fracture Energy ◽  
Digital Image ◽  
Adhesive Joints ◽  
Image Correlation ◽  
Mode I ◽  
Structural Adhesive

scholarly journals Investigation by Digital Image Correlation of Mixed Mode I and II Fracture Behavior of Metallic IASCB Specimens with Additive Manufactured Crack-Like Notch

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 400 ◽  
Author(s):  
Ivo Campione ◽  
Tommaso Maria Brugo ◽  
Giangiacomo Minak ◽  
Jelena Janković Tomić ◽  
Nebojša Bogojević ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Mixed Mode ◽  
Fracture Behavior ◽  
Selective Laser Sintering ◽  
Local Stress ◽  
Fatigue Loading ◽  
Image Correlation ◽  
Mode I ◽  
Displacement Fields

This work investigates the fracture behavior of maraging steel specimens manufactured by the selective laser sintering (SLS) technology, in which a crack-like notch (sharp notch) was directly produced during the additive manufacturing (AM) process. For the evaluation of the fracture toughness, the inclined asymmetrical semi-circular specimen subjected to three points loading (IASCB) was used, allowing to cover a wide variety of Mode I and II combinations. The effectiveness of manufacturing crack-like notches via the SLS technique in metals was evaluated by comparing the obtained experimental results with the ones obtained with pre-cracks induced by fatigue loading. The investigation was carried out by using the digital image correlation (DIC) technique, that allowed the evaluation of the full displacement fields around the crack tip. The displacement field was then used to compute the stress intensity factors (SIFs) for various combinations of Mode I and II, via a fitting technique which relies on the Williams’ model for the displacement. The SIFs obtained in this way were compared to the results obtained with the conventional critical load method. The results showed that the discrepancy between the two methods reduces by ranging from Mode I to Mode II loading condition. Finally, the experimental SIFs obtained by the two methods were described by the mixed mode local stress criterium.

Mode I Fracture at Spot Welds in Dual-Phase Steel: An Application of Reverse Digital Image Correlation

2010 ◽  
Vol 50 (8) ◽  
pp. 1199-1212 ◽  
Author(s):  
H. Tao ◽  
P. D. Zavattieri ◽  
L. G. Hector ◽  
W. Tong
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Dual Phase Steel ◽  
Image Correlation ◽  
Mode I ◽  
Dual Phase ◽  
Spot Welds ◽  
Mode I Fracture
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