Journal
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
Volume 30, Issue 9, Pages 1377-1399Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/10567895211001410
Keywords
Concrete; experiments; failure process; phase filed; ABAQUS
Categories
Funding
- National Natural Science Foundation of China [51878154, 51478108]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [No.KYCX20_0077]
- Fundamental Research Funds for the Central Universities [3205002101D]
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In this study, experiments and numerical simulations were used to investigate the failure process of concrete, analyzing the characteristics of cracks and obtaining force-CMOD and force-deflection curves. The phase field (PF) damage model was applied to study the failure processes of concrete structures, and the numerical results were consistent with experimental and calculated results of other researchers.
In this research, experiments and numerical simulations are employed to research the failure process of concrete. Fracture experiments on three-point bending (TPB) concrete beams with a prefabricated edge notch at the middle of the beam bottom are performed using a modified rigid testing instrument. The characteristics of the crack and section are analyzed, including the crack tensile opening displacement, crack length and width, and crack faces characteristics. Also, the full curves of the force-crack tensile opening displacement (CMOD) and force-deflection of the TPB beams with the prefabricated edge notch after breakage are obtained. The phase field (PF) damage model is applied to the mixed-mode and mode-I failure processes of concrete structures through the ABAQUS subroutine user defined element (UEL). The crack path and the full curves of force-CMOD and force-deflection obtained by numerical calculations are consistent with the experimental results and the calculated results of other researchers. The influences of the mesh sizes, initial lengths, and notched depths on the TPB beam of concrete are also analyzed.
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