Publication detail

A CRACK APPROACHING THE EDGE OF THE AGGREGATE

VYHLÍDAL, M. KLUSÁK, J.

Original Title

A CRACK APPROACHING THE EDGE OF THE AGGREGATE

Type

abstract

Language

English

Original Abstract

In this work, the influence of a crack approaching the edge of the amphibolite inclusion on fracture behaviour of cement composite is investigated. Specimens of the nominal dimensions 40 × 40 × 160 mm with polygonal amphibolite inclusion of 8 × 8 × 40 mm were provided with an initial central edge notch with a depth 12 mm, which was made by diamond blade saw. To determine the influence of polygonal cavity on fracture behaviour, fracture tests were conducted via three-point bending. The aim of this work is to analyse the behaviour of such specimen by means of finite element method (FEM) principles in Ansys, Inc. software. For this reason, a simplified 2D model was created for plane strain conditions and based on the fracture test configuration. The crack propagation assessment was based on generalized fracture mechanics approaches using a criterion of an average value of tangential stress determined in dependence on the polar angle θ. The results of numerical analysis indicate that the debonding in the close vicinity of the bottom edge of the inclusion occurred. In other words, imperfect compaction of the fresh mixture and a smooth surface of the aggregate created poor interface with lower mechanical-fracture parameters.

Keywords

Amphibolite inclusion, Average tangential stress, Finite Element Method, Fracture Mechanics.

Authors

VYHLÍDAL, M.; KLUSÁK, J.

Released

20. 10. 2020

Publisher

VŠB Technical University of Ostrava, Faculty of Civil Engineering

Location

Ostrava

ISBN

978-80-248-4457-2

Book

The 3rd International Conference on Sustainable Development in Civil, Urban and Transportation Engineering 2020 Book of Abstracts

Pages from

43

Pages to

46

Pages count

4

BibTex

@misc{BUT165637,
  author="Michal {Vyhlídal} and Jan {Klusák}",
  title="A CRACK APPROACHING THE EDGE OF THE AGGREGATE",
  booktitle="The 3rd International Conference on Sustainable Development in Civil, Urban and Transportation Engineering 2020
Book of Abstracts",
  year="2020",
  pages="43--46",
  publisher="VŠB Technical University of Ostrava, Faculty of Civil Engineering",
  address="Ostrava",
  isbn="978-80-248-4457-2",
  note="abstract"
}