Experimental Study on Concrete Fracture Process Zone Using Digital Image Correlation Technique

2019 ◽  
Vol 49 (2) ◽  
pp. 20180863
Author(s):  
Shengtao Li ◽  
Xudong Chen ◽  
Lu Feng ◽  
Xiangru Zhang ◽  
Xiangqian Fan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Fracture Process ◽  
Fracture Process Zone ◽  
Process Zone ◽  
Image Correlation ◽  
Correlation Technique ◽  
Concrete Fracture ◽  
Digital Image Correlation Technique

scholarly journals Crack Propagation and Fracture Process Zone (FPZ) of Wood in the Longitudinal Direction Determined Using Digital Image Correlation (DIC) Technique

2019 ◽  
Vol 11 (13) ◽  
pp. 1562 ◽  
Author(s):  
Ying Yu ◽  
Weihang Zeng ◽  
Wen Liu ◽  
He Zhang ◽  
Xiaohong Wang
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Strain Field ◽  
Fracture Process ◽  
Fracture Process Zone ◽  
Process Zone ◽  
Longitudinal Direction ◽  
Image Correlation ◽  
Elastic Crack ◽  
Dic Technique

As a state-of-the-art method, the digital image correlation (DIC) technique is used to capture the fracture properties of wood along the longitudinal direction, such as the crack propagation, the strain field, and the fracture process zone (FPZ). Single-edge notched (SEN) specimens made of Douglas fir (Pseudotsuga menziesii) from Canada with different notch-to-depth ratios are tested by three-point-bending (3-p-b) experiment. The crack mouth opening displacements (CMOD) measured by the clip gauge and DIC technique agree well with each other, verifying the applicability of the DIC technique. Then, the quasi-brittle fracture process of wood is analyzed by combing the load-CMOD curve and the strain field in front of the preformed crack. Additionally, the equivalent elastic crack length is calculated using the linear superposition hypothesis. The comparison between the FPZ evolution and the equivalent elastic crack shows that specimens with higher notch-to-depth ratios have better cohesive effect and higher cracking resistance.

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