DSpace
 

Researchspace >
General science, engineering & technology >
General science, engineering & technology >
General science, engineering & technology >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3773

Title: Fracture mechanics in pavement design
Authors: Denneman, E
Wu, R
Kearsley, EP
Visser, AT
Keywords: Palmgren-miner
Fracture mechanics principles
Fracture formation
Fracture propagation
Pavement materials
Pavement design
Issue Date: Jul-2009
Publisher: Southern African Transport Conference (SATC)
Citation: Denneman, E, Wu, R, Kearsley, EP and Visser, AT. 2009. Fracture mechanics in pavement design. Sustainable Transport: 28th Annual Transport Conference (SATC) 2009, Pretoria, South Africa, 6-9 July 2009, pp 255-262
Abstract: Pavement materials are subjected to high-cycle loading regimes. Conventional design methods employ the Palmgren-Miner damage hypothesis to predict the fatigue life of pavement materials. The material itself is usually characterized in the analysis by a measured material parameter. This approach is practical and can readily be calibrated, but does have some known shortcomings. The aim of the paper is to discuss some of the limitations of empirically based, Palmgren-Miner type, damage laws. The paper also seeks to promote the use of size independent material properties to characterize pavement materials. Some material properties used in current methods, such as the concepts of strain at break and flexural strength are known to exhibit size effects. Examples of the use of fracture mechanics providing an alternative to these conventional design parameters are given in the paper. The paper shows that although much further development is required before fracture mechanics can be relied upon to fully replace the Palmgren-Miner type damage laws, some of the concepts can already be applied to improve pavement design methods.
Description: Sustainable Transport: 28th Annual Transport Conference (SATC) 2009, Pretoria, South Africa, 6-9 July 2009
URI: http://hdl.handle.net/10204/3773
ISBN: 9781920017392
Appears in Collections:Accelerated pavement testing
Planning support systems
General science, engineering & technology

Files in This Item:

File Description SizeFormat
Denneman_2009.pdf483.09 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback