TY - GEN
T1 - Characterization of Fracture Behavior of Multi-Walled Carbon Nanotube Reinforced Cement Paste Using Digital Image Correlation
AU - Zohhadi, Nima
AU - Koohbor, Behrad
AU - Matta, Fabio
AU - Kidane, Addis
N1 - Funding Information:
The support of the University of South Carolina (USC) through a Promising Investigator Research Award (PIRA) to the third author, the State Center for Mechanics, Materials and Non-Destructive Evaluation, and the Magellan Program for undergraduate research is gratefully acknowledged. Special thanks are extended to: Ms. English Player (formerly undergraduate research assistant and USC Magellan mini-grantee), Prof. Navid Saleh and Mr. Nirupam Aich (formerly graduate student) for their assistance in processing of MWCNTs; and Prof. Michael Sutton, Prof. Anthony Reynolds, and Mr. Dan Wilhelm (USC Department of Mechanical Engineering) for their assistance in the use of the load test frame, CMOD sensor and DIC equipment. Correlated Solutions, Inc. (Columbia, SC) generously provided the Vic-3D v7 software used for the DIC analysis.
PY - 2015
Y1 - 2015
N2 - This paper reports on the fracture behavior of MWCNT-reinforced cement paste based on evidence from three-point bending tests of single-edge notched beam samples. Digital image correlation (DIC) was used to measure full-field displacements at different stages of fracture in reinforced and unreinforced samples. Strain maps extracted from displacement data were used to characterize the morphology of the fracture process zone (FPZ). The DIC principal tensile strain maps from nanoreinforced samples consistently highlighted the development of a larger FPZ prior to failure. Evidence from scanning electron microscopy analysis of fracture surfaces further supports the hypothesis that highly-dispersed and well-bonded MWCNTs contribute to toughness through crack-bridging.
AB - This paper reports on the fracture behavior of MWCNT-reinforced cement paste based on evidence from three-point bending tests of single-edge notched beam samples. Digital image correlation (DIC) was used to measure full-field displacements at different stages of fracture in reinforced and unreinforced samples. Strain maps extracted from displacement data were used to characterize the morphology of the fracture process zone (FPZ). The DIC principal tensile strain maps from nanoreinforced samples consistently highlighted the development of a larger FPZ prior to failure. Evidence from scanning electron microscopy analysis of fracture surfaces further supports the hypothesis that highly-dispersed and well-bonded MWCNTs contribute to toughness through crack-bridging.
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U2 - 10.1007/978-3-319-06977-7_10
DO - 10.1007/978-3-319-06977-7_10
M3 - Conference contribution
AN - SCOPUS:84906871827
SN - 9783319069760
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 73
EP - 79
BT - Fracture, Fatigue, Failure, and Damage Evolution - Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics
PB - Springer New York LLC
T2 - 2014 SEM Annual Conference and Exposition on Experimental and Applied Mechanics
Y2 - 2 June 2014 through 5 June 2014
ER -