On the tortuosity of the fracture surface in concrete

Journal Article · Thu May 01 04:00:00 EDT 1997 · Cement and Concrete Research

DOI:https://doi.org/10.1016/S0008-8846(97)00063-X· OSTI ID:511993

Sabir, B B; Wild, S; Asili, M ^[1]

---

1. Univ. of Glamorgan, Pontypridd (United Kingdom)

This study presents the results of fracture toughness and fracture energy of concrete obtained from tests conducted on compact compression eccentrically loaded (CCEL) specimens. The fracture toughness is calculated from the critical value of the stress intensity factor, the latter being determined by a numerical procedure. The specimen geometry and testing procedure used results in a linear load-displacement relationship; the area under the resulting curve is used to determine the fracture energy with an allowance being made for the interaction that takes place between the specimen and the testing machine. The fracture energy is also determined from the critical value of the strain energy release rate which is evaluated through the fracture toughness. Several notch geometries are considered and the results show that while the fracture toughness is not influenced by the notch size, the fracture energy decreased with increasing size of notch. The test methodology and calculation procedure enabled an estimation to be made of the tortuosity effects on the fracture surface of the concrete.

• OSTI ID: 511993
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 5 Vol. 27; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CONCRETES
CRACK PROPAGATION
FRACTURE MECHANICS
FRACTURE PROPERTIES
MECHANICAL TESTS
MICROSTRUCTURE
NOTCHES
STRAINS
STRESS INTENSITY FACTORS