Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements

The primary objective of this study was to identify the mechanisms for the development and propagation of longitudinal cracks that initiate at the surface of composite pavement. In this study the finite element program ANSYS version (5.4) was used and the model worked out using this program has the...

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Autores principales:	Zainab Ahmed Alkaissi, Duraid Ali Al Khafagy
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2009
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/d379572912984855b1e71f37170312d9
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spelling	oai:doaj.org-article:d379572912984855b1e71f37170312d92021-12-02T07:00:09ZPropagation Mechanisms for Surface Initiated Cracking in Composite Pavements1818-11712312-0789https://doaj.org/article/d379572912984855b1e71f37170312d92009-09-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/571https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 The primary objective of this study was to identify the mechanisms for the development and propagation of longitudinal cracks that initiate at the surface of composite pavement. In this study the finite element program ANSYS version (5.4) was used and the model worked out using this program has the ability to analyze a composite pavement structure of different layer properties. Also, the aim of this study was modeling and analyzing of the composite pavement structure with the physical presence of crack induced in concrete underlying layer. The results obtained indicates that increasing the thickness of the asphalt layer tends to decrease the stress intensity factor, which may be attributed to the rapidly decrease of horizontal tensile stress in the asphalt layer. The cracks initiate at the surface due to high vertical stress and shear stress from wheel loads tends to propagate downward due tensile stress generated at the bottom of the asphalt layer or near crack tip, and the whole process occur at the same location of the existing cracks in underlying concrete layer rather than travel up from existing crack. As the load position varies from the crack zone, this result in tensile stresses or tension at the crack tip, leading to increase the stress intensity factor and intern result in crack propagation further into the depth of the pavement. Zainab Ahmed AlkaissiDuraid Ali Al KhafagyAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 5, Iss 3 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Zainab Ahmed Alkaissi Duraid Ali Al Khafagy Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements
description	The primary objective of this study was to identify the mechanisms for the development and propagation of longitudinal cracks that initiate at the surface of composite pavement. In this study the finite element program ANSYS version (5.4) was used and the model worked out using this program has the ability to analyze a composite pavement structure of different layer properties. Also, the aim of this study was modeling and analyzing of the composite pavement structure with the physical presence of crack induced in concrete underlying layer. The results obtained indicates that increasing the thickness of the asphalt layer tends to decrease the stress intensity factor, which may be attributed to the rapidly decrease of horizontal tensile stress in the asphalt layer. The cracks initiate at the surface due to high vertical stress and shear stress from wheel loads tends to propagate downward due tensile stress generated at the bottom of the asphalt layer or near crack tip, and the whole process occur at the same location of the existing cracks in underlying concrete layer rather than travel up from existing crack. As the load position varies from the crack zone, this result in tensile stresses or tension at the crack tip, leading to increase the stress intensity factor and intern result in crack propagation further into the depth of the pavement.
format	article
author	Zainab Ahmed Alkaissi Duraid Ali Al Khafagy
author_facet	Zainab Ahmed Alkaissi Duraid Ali Al Khafagy
author_sort	Zainab Ahmed Alkaissi
title	Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements
title_short	Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements
title_full	Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements
title_fullStr	Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements
title_full_unstemmed	Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements
title_sort	propagation mechanisms for surface initiated cracking in composite pavements
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2009
url	https://doaj.org/article/d379572912984855b1e71f37170312d9
work_keys_str_mv	AT zainabahmedalkaissi propagationmechanismsforsurfaceinitiatedcrackingincompositepavements AT duraidalialkhafagy propagationmechanismsforsurfaceinitiatedcrackingincompositepavements
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Propagation Mechanisms for Surface Initiated Cracking in Composite Pavements

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