Computer simulation of stress wave propagation in repair systems

Leslaw J. Kwasniewski 2Andrzej Garbacz 1

1. Warsaw University of Technology, Faculty of Civil Engineering, Building Materials Eng.Division (BME WUT), Armii Ludowej 16, Warszawa 00-637, Poland
2. Warsaw University of Technology, Faculty of Civil Engineering, al. Armii Ludowej 16, Warszawa 00-637, Poland

Abstract

Recently, a growing interest in application of non-destructive techniques (NDT) for evaluation of repair efficiency is noted. For this purpose, stress wave based methods, e.g. impact echo, ultrasonic methods are commonly recommended. As a result of repair, a system containing two or more layers is created. Propagation of stress waves in this kind of system is complex phenomenon and depends on acoustic properties of repair material and its thickness as well as a quality of interface.

In this work finite element (FE) method was used to simulate stress wave propagation for various models of repair system. Ls-Dyna, an explicit finite element program dedicated for transient dynamics was applied. Several cases of impact-echo test with different parameters of layer system were analysed. Among considered model parameters were acoustic properties, boundary conditions, layer thickness of repair material and presence of delamination at the interface. Computer simulations of the stress wave propagation showed good correlation with the impact-echo principle. The effect of repair system parameters on wave propagation was discussed.

The research project was granted by Polish Scientific Research Committee - grant number KBN 4 T07E 027 27 (2004-2006).

Legal notice
  • Legal notice:

    Copyrighted materials, (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced, stored in or introduced into a retrieval or caching system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise), or for any purpose, without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: http://science24.com/paper/4595 must be provided.

 

Related papers
  1. Characterization of concrete surface geometry by laser profilometry
  2. On the effect of concrete substrate roughness on stress wave propagation in repair systems
  3. On the usability of wavelet analysis for non-destructive assessment of repair efficiency by impact-echo method

Presentation: poster at E-MRS Fall Meeting 2005, Symposium G, by Leslaw J. Kwasniewski
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-08-20 14:22
Revised:   2009-06-07 00:44
Google
 
Web science24.com
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine