In this research, a numerical analysis has been conducted to predict the fracture response of a novel type of fiber-reinforced concrete blocks, called “multi-functional fiber reinforced concretes” (MFRCs). In MFRCs, fibers have been coated with a shell. This will allow the structure to be used for multiple purposes, including concrete self-healing. This study is conducted utilizing phase-field fracture framework. The shell thickness and the ratio of fiber length to diameter are the geometrical parameters whose effects on the fracture resistance of the MFRCs have been analyzed. As choosing the right shell material is under investigation, in the next step of the study, in addition to the geometrical factors, different material mismatch cases for the critical energy release rate of the shell has been analyzed. Moreover, the application of two different fibers, polyester fiber and polypropylene fiber (with almost 10 times higher critical energy release rate), are looked into. All the structures undergo three loading conditions: tensile loading, compressive loading, and three-point bending.
This research is being done with collaborations with Dr. Amir Y. Farnam‘s lab (ASIM Lab), Dr. Christopher Sales‘s lab (Sales Lab), and Dr. Caroline Schauer‘s lab (NMPP).
Related Publications
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- Khaneghahi MH, Kamireddi D, Rahmaninezhad SA, Schauer CL, Sales CM, Najafi A, Cotton A, Sadighi A, Farnam YA. “Development of bio-inspired multi-functional polymeric-based fibers (BioFiber) for advanced delivery of bacterial-based self-healing agent in concrete”, In MATEC Web of Conferences, vol. 378, p. 02001. EDP Sciences, 2023.
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- Rahmaninezhad SA, Khaneghahi MH, Farnam YA, Schauer CL, Najafi A, Street RM, Sadighi A, Kamireddi D, Sales CM. “Understanding the importance of endosporulation methods for generating endospores that can resist harsh conditions and produce calcite in bio self-healing of concrete”, In MATEC Web of Conferences, vol. 378, p. 02004. EDP Sciences, 2023.
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- Sadighi A, Maghami E, Khaneghahi MH, Kamireddi D, Rahmaninezhad SA, Farnam YA, Sales CM, Schauer CL, Najafi AR. “Fracture analysis of multifunctional fiber-reinforced concrete using phase-field method”, International Journal of Solids and Structures, 2023, 283, 112493.
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- Khaneghahi MH, Kamireddi D, Rahmaninezhad SA, Sadighi A, Schauer CL, Sales CM, Najafi AR, Cotton A, Street R, Farnam YA. “Development of a nature-inspired polymeric fiber (BioFiber) for advanced delivery of self-healing agents into concrete”, Construction and Building Materials, 2023, 408, 133765.
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- Khaneghahi MH, Rahmaninezhad SA, Kamireddi D, Sadighi A, Sales CM, Schauer CL, Najafi AR, Farnam YA. “Carbonate biomineralization potential of endospore-laden polymeric fibers (BioFibers) for bio-self-healing applications”, Developments in the Built Environment, 2024, 100351.
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- Rahmaninezhad SA, Khaneghahi MH, Sadighi A, Kamireddi D, Street R., Farnam YA., Schauer CL, Najafi AR, Sales CM, “Carbonate biomineralization potential of endospore-laden polymeric fibers (BioFibers) for bio-self-healing applications”, Construction and Building Materials, 2024, 135528.
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- Rahmaninezhad SA, Khaneghahi MH, Sadighi A, Ahmari K., Kamireddi D, Street R., Farnam YA., Schauer CL, Najafi AR, Sales CM, “Overcoming the inhibitory effects of urea to improve the kinetics of microbial-induced calcium carbonate precipitation (MICCP) by Lysinibacillus sphaericus strain MB284”, Journal of Bioscience and Bioengineering, 2024.