Acoustic emission due to fatigue damage mechanisms in high-strength concrete with different aggregates

authored by

Tim Timmermann, S. Löhnert, R. Patel, N. Oneschkow

Abstract

The behaviour of high-strength concrete under compressive fatigue loading was investigated within a research project of the priority programme SPP 2020. In this paper, results concerning the influence of the type of coarse aggregate on the fatigue behaviour of high-strength concrete, with focus on the acoustic emission analysis, are presented comparatively. Two high-strength concretes with basalt and granite as coarse aggregate are investigated using two stress levels S

_c,max = 0.85 and S

_c,max = 0.70. Both concretes show similar characteristics of acoustic emission signals for the higher stress level. But for the lower stress level considerable differing characteristic are identified for the granite concrete. This might be an indication for a differing fatigue damage mechanism due to the type of aggregate. The damage mechanisms observed in experiments or rather the crack propagation are simulated using XFEM. Therefore a first modelling approach is presented.

Organisation(s)

Institute of Continuum Mechanics
Institute of Building Materials Science

Type

Conference contribution

Pages

1491-1496

No. of pages

Publication date

2019

Publication status

Published

Electronic version(s)

https://doi.org/10.1201/9780429426506-257 (Access: Closed)

Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{339a9e4ef38b4be4b0ece74d82d4fdcc,
title = "Acoustic emission due to fatigue damage mechanisms in high-strength concrete with different aggregates",
abstract = "The behaviour of high-strength concrete under compressive fatigue loading was investigated within a research project of the priority programme SPP 2020. In this paper, results concerning the influence of the type of coarse aggregate on the fatigue behaviour of high-strength concrete, with focus on the acoustic emission analysis, are presented comparatively. Two high-strength concretes with basalt and granite as coarse aggregate are investigated using two stress levels S c,max = 0.85 and S c,max = 0.70. Both concretes show similar characteristics of acoustic emission signals for the higher stress level. But for the lower stress level considerable differing characteristic are identified for the granite concrete. This might be an indication for a differing fatigue damage mechanism due to the type of aggregate. The damage mechanisms observed in experiments or rather the crack propagation are simulated using XFEM. Therefore a first modelling approach is presented.",
author = "Tim Timmermann and S. L{\"o}hnert and R. Patel and N. Oneschkow",
note = "Funding Information: This research project was supported by the German Research Foundation (DFG) within the scope of priority program 2020 “Cyclic deterioration of High-Performance Concrete in an experimental virtual lab”. The authors would like to express their gratitude for the financial support.",
year = "2019",
doi = "10.1201/9780429426506-257",
language = "English",
isbn = "9781138386969",
pages = "1491--1496",
editor = "Alphose Zingoni",
booktitle = "Advances in Engineering Materials, Structures and Systems",
}