Definition of mode-I fracture behaviour of plain and fiber reinforced various grades of concretes by digital image analysis

Abstract

In this study, the fracture behavior of notched concrete beams produced with concrete strength from 25 to 100 MPa and steel fiber volume ratio from 0 to 1.5% were experimentally investigated under three-point loading. The digital image correlation method was adopted to determine the full-field deformation map on the beam surface. Test results were evaluated concerning vertical deflection versus CMOD, peak load fracture energy, effective crack length and unstable fracture toughness. Based on the characteristic length of specimen, an empirical relation was developed for the estimation of effective crack length, which yielded results close to those of two parameter model.

Keywords:

• Steel fiber
• notched beam
• digital image correlation
• CMOD
• peak load fracture energy
• effective crack length
• unstable fracture toughness

Authors’ Contribution

Muhammed Gümüş: Investigation, Writing - original draft, Conceptualization. Abdussamet Arslan: Supervision, Project administration, Writing – Review & Editing. Hüseyin Kalkan: Investigation, Data Curation.

Disclosure Statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.