Publication detail

Lattice modeling of aggregate interlocking in concrete

ELIÁŠ, J. STANG, H.

Original Title

Lattice modeling of aggregate interlocking in concrete

Type

journal article - other

Language

English

Original Abstract

In this paper, we study a mixed-mode fracture process using a conventional two dimensional lattice model with incorporated meso-level internal material structure. Simple elasto-brittle elements of the network are divided into three phases according to a projected grain layout. The stiffness of any element that fulfils a failure criterion is removed. As a new feature of the otherwise standard lattice approach, we added the recovery of normal stiffness when a severed element enters the compressive regime. This enhancement enables capture of the shear resistance of an existing crack caused by crack roughness, i.e. what is termed aggregate interlocking. We demonstrate this enhancement via the simulation of mixed-mode experiments on concrete performed at a laboratory at the Technical University of Denmark. Double notched concrete specimens were initially pre-cracked in tension. Then, various combinations of tensile and shear load (normal and tangential to the crack plane) were applied. Simulated crack patterns and load–displacement curves are compared to the experimental observations.

Keywords

Lattice model - Elasto-brittle elements - Non-proportional load-path - Stiffness recovery - Aggregate interlocking

Authors

ELIÁŠ, J.; STANG, H.

RIV year

2012

Released

28. 2. 2012

Location

Nizozemsko

ISBN

0376-9429

Periodical

INTERNATIONAL JOURNAL OF FRACTURE

Year of study

175

Number

2

State

Kingdom of the Netherlands

Pages from

1

Pages to

11

Pages count

11

URL

http://link.springer.com/article/10.1007/s10704-012-9677-3

BibTex

@article{BUT89882,
  author="Jan {Eliáš} and H. {Stang}",
  title="Lattice modeling of aggregate interlocking in concrete",
  journal="INTERNATIONAL JOURNAL OF FRACTURE",
  year="2012",
  volume="175",
  number="2",
  pages="1--11",
  issn="0376-9429",
  url="http://link.springer.com/article/10.1007/s10704-012-9677-3"
}