Journal article
Fracture analysis of multifunctional fiber-reinforced concrete using phase-field method
International journal of solids and structures, 112493
Sep 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this paper, 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. In order to judge what configuration performs best, the values of peak force and absorbed energy of each structure in each case study have been taken into consideration and compared with those of other structures. It was seen that the most favorable performance and configuration depend on the loading condition and also the material set. Under tension, MFRCs with the lowest fiber length to diameter ratio exhibit the highest peak force and absorbed energy in the case of polyester fiber. The same observation was made for all models and material sets under compressive loading. Under three-point bending loading condition, for the cases of polyester fiber, similar results were obtained as the lowest fiber length to diameter ratio showed the best mechanical response. Having said that, it must be mentioned that shell material had a dominant effect on the fracture response of the structure under this loading condition. Polypropylene fibers also managed to increase the peak forces in different loading conditions.
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Details
- Title
- Fracture analysis of multifunctional fiber-reinforced concrete using phase-field method
- Creators
- Amirreza Sadighi - Drexel UniversityEbrahim Maghami - Drexel UniversityMohammad Houshmand Khaneghahi - Drexel UniversityDivya Kamireddi - Drexel UniversitySeyed Ali Rahmaninezhad - Drexel UniversityYaghoob (Amir) Farnam - Drexel UniversityChristopher Sales - Drexel UniversityCaroline Schauer - Drexel UniversityAhmad R. Najafi - Drexel University
- Publication Details
- International journal of solids and structures, 112493
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- C. and J. Nyheim Plasma Institute; Civil, Architectural, and Environmental Engineering; Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001089603500001
- Scopus ID
- 2-s2.0-85172989342
- Other Identifier
- 991021229850104721
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- Web of Science research areas
- Mechanics