Digital Image Correlation Analysis of CFRP to Brick Bonded Joints Fastened by Fiber Anchor

2014 ◽  
Vol 624 ◽  
pp. 238-245 ◽  
Author(s):  
Carmelo Caggegi ◽  
Luc Chevalier ◽  
Vincent Pensée ◽  
Massimo Cuomo
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
New Technology ◽  
Peak Load ◽  
Stress Transfer ◽  
Image Correlation ◽  
Fiber Reinforced Polymer ◽  
Bonded Joints ◽  
Reinforced Polymer ◽  
Bonded Joint

In the framework of the reinforcement of masonry structures by FRP sheets (Fiber Reinforced Polymer), the use of “Fiber Anchor” is an innovative performing solution to increase the peak load and the dissipation capability of the strengthened system. To analyze the performance of this new technology an experimental campaign composed by 36 tests has been conducted. Six series of CFRP to brick bonded joint fastened by different configurations of fiber anchor have been tested. To deeply describe the measure fields, the Digital Image Correlation (DIC) has been used. The strain fields obtained in the series not fastened by anchors have permitted to define the bond stress field and the advancement of the stress transfer zone. The DIC appears as a performing methodology to use in a lot of civil engineering experimental problems.

scholarly journals Evaluation on Rock Tensile Failure of the Brazilian Discs under Different Loading Configurations by Digital Image Correlation

2020 ◽  
Vol 10 (16) ◽  
pp. 5513
Author(s):  
Diyuan Li ◽  
Bang Li ◽  
Zhenyu Han ◽  
Quanqi Zhu
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Equivalent Stress ◽  
Peak Load ◽  
Brazilian Test ◽  
Experimental Results ◽  
Image Correlation ◽  
Tensile Failure ◽  
Rock Types ◽  
Loading Methods

The fracture behavior of the disc specimens in the Brazilian test is closely related to the reliability and accuracy of the experimental results. To comprehensively investigate the effect of various loading methods and rock material types on the failure mechanism of the Brazilian discs, five different rock types tested with three typical loading methods were employed in this work. The digital image correlation (DIC) method was applied to record and analyze the strain and displacement field of the specimens during the loading process. Experimental results indicate that the peak load and deformation characteristics of the Brazilian discs are strongly affected by the loading types. The Brazilian test with the Chinese standard is evidently not suitable for measuring the tensile strength of rocks, and the other two testing methods may lead to an invalid failure mode for rock materials with high stiffness and tensile to compressive strength ratio. Furthermore, it revealed that the maximum equivalent stress point of a disc specimen is co-controlled by the material stiffness and its tensile–compression ratio. The present work shows that it is necessary to select a suitable loading configuration for each rock type in the Brazilian test.

Sign in / Sign up

Export Citation Format

Share Document