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

conference paper

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

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.

Keywords

Lomová houževnatost, stavební kompozity, metoda konečných prvků, numerická simulace

Key words in English

geometry effect, fracture toughness, cement-based, three-point bending, fracture toughness, numerically simulated

Authors

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

RIV year

2007

Released

14. 5. 2007

Location

Svratka, Česká republika

ISBN

978-80-87012-06-2

Book

Engineering mechanics 2007

Pages from

243

Pages to

244

Pages count

2

BibTex

@inproceedings{BUT23207,
  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",
  booktitle="Engineering mechanics 2007",
  year="2007",
  pages="243--244",
  address="Svratka, Česká republika",
  isbn="978-80-87012-06-2"
}