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Show simple item record Denneman, E Wu, R Kearsley, EP Visser, AT 2009-11-23T10:21:16Z 2009-11-23T10:21:16Z 2009-07
dc.identifier.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 en
dc.identifier.isbn 9781920017392
dc.description Sustainable Transport: 28th Annual Transport Conference (SATC) 2009, Pretoria, South Africa, 6-9 July 2009 en
dc.description.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. en
dc.language.iso en en
dc.publisher Southern African Transport Conference (SATC) en
dc.subject Palmgren-miner en
dc.subject Fracture mechanics principles en
dc.subject Fracture formation en
dc.subject Fracture propagation en
dc.subject Pavement materials en
dc.subject Pavement design en
dc.title Fracture mechanics in pavement design en
dc.type Presentation en

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