Publication detail

Evaluation of notch geometry effect on behaviour of fracture toughness testing specimen

SEITL, S. KLUSÁK, J. KERŠNER, Z. KNÉSL, Z.

Original Title

Evaluation of notch geometry effect on behaviour of fracture toughness testing specimen

English Title

Evaluation of notch geometry effect on behaviour of fracture toughness testing specimen

Type

abstract

Language

Czech

Original Abstract

The basic fracture properties of cement-based composite are ascertained on the basic of test evaluations of the specimens in suitable test configurations. Three-point bending specimens with a central starting notch are the most frequently used specimens for laboratory testing. Through models of elastic cracks the critical crack length and effective fracture toughness (or toughness) can be calculated. The influence of the geometry of the starting notch in a three-point bend specimen on the resulting values of critical applied force and fracture toughness is studied in this paper. To this end, a crack initiation at the notch tip is numerically simulated. It is shown that the values of fracture toughness obtained for specimens with larger widths of starting notch can be overestimated.

English abstract

TThe basic fracture properties of cement-based composite are ascertained on the basic of test evaluations of the specimens in suitable test configurations. Three-point bending specimens with a central starting notch are the most frequently used specimens for laboratory testing. Through models of elastic cracks the critical crack length and effective fracture toughness (or toughness) can be calculated. The influence of the geometry of the starting notch in a three-point bend specimen on the resulting values of critical applied force and fracture toughness is studied in this paper. To this end, a crack initiation at the notch tip is numerically simulated. It is shown that the values of fracture toughness obtained for specimens with larger widths of starting notch can be overestimated.

Keywords

effect on behaviour, fracture toughness, three-point bending

Key words in English

effect on behaviour, fracture toughness, three-point bending

Authors

SEITL, S.; KLUSÁK, J.; KERŠNER, Z.; KNÉSL, Z.

Released

14. 5. 2007

Location

Svratka, Česká republika

Pages from

243

Pages to

244

Pages count

2

BibTex

@misc{BUT60633,
  author="Stanislav {Seitl} and Jan {Klusák} and Zbyněk {Keršner} and Zdeněk {Knésl}",
  title="Evaluation of notch geometry effect on behaviour of fracture toughness testing specimen",
  year="2007",
  pages="243--244",
  address="Svratka, Česká republika",
  note="abstract"
}