Simulation of crack propagation in fiber-reinforced concrete by fracture mechanics

Journal Article · Sun Feb 01 04:00:00 EST 2004 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2003.08.015· OSTI ID:20658340

Jun, Zhang; Li, Victor C

Mode I crack propagation in fiber-reinforced concrete (FRC) is simulated by a fracture mechanics approach. A superposition method is applied to calculate the crack tip stress intensity factor. The model relies on the fracture toughness of hardened cement paste (K{sub IC}) and the crack bridging law, so-called stress-crack width ({sigma}-{delta}) relationship of the material, as the fundamental material parameters for model input. As two examples, experimental data from steel FRC beams under three-point bending load are analyzed with the present fracture mechanics model. A good agreement has been found between model predictions and experimental results in terms of flexural stress-crack mouth opening displacement (CMOD) diagrams. These analyses and comparisons confirm that the structural performance of concrete and FRC elements, such as beams in bending, can be predicted by the simple fracture mechanics model as long as the related material properties, K{sub IC} and ({sigma}-{delta}) relationship, are known.

• OSTI ID: 20658340
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 2 Vol. 34; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BENDING
CEMENTS
CRACK PROPAGATION
CRACKS
FIBERS
FRACTURE MECHANICS
FRACTURE PROPERTIES
PERFORMANCE
REINFORCED CONCRETE
SIMULATION
STEELS
STRESS INTENSITY FACTORS
STRESSES