Propagation Mechanisms for Surface Initiated Crackingin 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:	Duraid Ali Al Khafagy, Zainab Ahmed Alkaissi
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2009
Materias:	Finite element; pavement model; crack propagation; composite pavement; stress intensity factor; stress distribution; crack initiation; horizontal tensile stress. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/8677e28014a344e1a7782489eec7688c
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id	oai:doaj.org-article:8677e28014a344e1a7782489eec7688c
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spelling	oai:doaj.org-article:8677e28014a344e1a7782489eec7688c2021-12-02T05:27:34ZPropagation Mechanisms for Surface Initiated Crackingin Composite Pavements1818-1171https://doaj.org/article/8677e28014a344e1a7782489eec7688c2009-01-01T00:00:00Zhttp://www.iasj.net/iasj?func=fulltext&aId=2377https://doaj.org/toc/1818-1171The 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.Duraid Ali Al KhafagyZainab Ahmed AlkaissiAl-Khwarizmi College of Engineering – University of BaghdadarticleFinite element; pavement model; crack propagation; composite pavement; stress intensity factor; stress distribution; crack initiation; horizontal tensile stress.Chemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 5, Iss 3, Pp 51-59 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Finite element; pavement model; crack propagation; composite pavement; stress intensity factor; stress distribution; crack initiation; horizontal tensile stress. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Finite element; pavement model; crack propagation; composite pavement; stress intensity factor; stress distribution; crack initiation; horizontal tensile stress. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Duraid Ali Al Khafagy Zainab Ahmed Alkaissi Propagation Mechanisms for Surface Initiated Crackingin 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	Duraid Ali Al Khafagy Zainab Ahmed Alkaissi
author_facet	Duraid Ali Al Khafagy Zainab Ahmed Alkaissi
author_sort	Duraid Ali Al Khafagy
title	Propagation Mechanisms for Surface Initiated Crackingin Composite Pavements
title_short	Propagation Mechanisms for Surface Initiated Crackingin Composite Pavements
title_full	Propagation Mechanisms for Surface Initiated Crackingin Composite Pavements
title_fullStr	Propagation Mechanisms for Surface Initiated Crackingin Composite Pavements
title_full_unstemmed	Propagation Mechanisms for Surface Initiated Crackingin Composite Pavements
title_sort	propagation mechanisms for surface initiated crackingin composite pavements
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2009
url	https://doaj.org/article/8677e28014a344e1a7782489eec7688c
work_keys_str_mv	AT duraidalialkhafagy propagationmechanismsforsurfaceinitiatedcrackingincompositepavements AT zainabahmedalkaissi propagationmechanismsforsurfaceinitiatedcrackingincompositepavements
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Propagation Mechanisms for Surface Initiated Crackingin Composite Pavements

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