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Experimantal study of reflective cracking and overall ultimate yield strengh model of periodic lattices

Abstract : The thesis is a part of the collaboration between the laboratory and an industrial compagny. It deals with two topics, connected by the problem of using cellular metal materials in construction. One of the major areas of application of cellular materials is energy absorption. This property can be characterized by the plastic yield. We propose a rigorous analytical model, based on homogenization methods, to predict the plastic yield of general periodic lattices. After validation, we use this model to study the influence of defects of uniformity and symmetry of material distribution along the walls of the cells. This work which is carried out on two-dimensional and three-dimensional cells leads to conclude that non-uniformity changes plastic yield's size and form, but non-symmetry has less significant incidence. Reflective cracking is generally observed in semi-rigid pavements. It can be explained by the propagation of shrinkage cracks, at the bases treated with hydraulic binders, into bituminous wearing layer. Among the existing methods to slow down this damage, we focus on the interlayers solutions, flexible or rigid, inserted between bases and wearing layer. Rigide ones are grid layers and have to reinforce the overlayer, then to bridge over the cracks. We have highlighted that a new test with an intermediate scale compared to the existing tests is needed. We designed this test with the aim to reproduce in the sample, the variations of characteristic functions calculated in pavement.
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https://pastel.archives-ouvertes.fr/pastel-00001516
Contributor : Ecole Des Ponts Paristech <>
Submitted on : Thursday, December 22, 2005 - 8:00:00 AM
Last modification on : Thursday, December 22, 2005 - 8:00:00 AM
Long-term archiving on: : Thursday, September 30, 2010 - 7:08:46 PM

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  • HAL Id : pastel-00001516, version 1

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Céline Florence. Experimantal study of reflective cracking and overall ultimate yield strengh model of periodic lattices. Engineering Sciences [physics]. Ecole des Ponts ParisTech, 2005. English. ⟨pastel-00001516⟩

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