Contact and detachment in granular materials represents a stimulating ques-tion about the mechanical aspects especially at microscale. In fact the phe-nomenon is the characterization of numerous materials degradation cases, likewise as damaging of asphalt mixture. Aim of this paper we will to suggest a first attempt and genuine model to simulate detachment between two granu-lar particles joined by a highly adhesive material. We develop the idea inside the hypo elasticity framework since the model will be able to simulate the classic behavior of the surface parts of road and/or runway pavements. The specific form of the mechanical contact between particles and adhesive take us to bring a deep investigation over the contact area. The great difference of either constitutive parameter involves careful consideration about the evolu-tion of the deformation field. The question take ours attention about a particu-lar framework built over the extreme elastic deformations concept, since ad-hesive materials is highly deformable. Therefore, we will be able to choice a specific form of the deformation energy proposing a simple mono-dimensional model simulating the transition from the surface body to a line body in according to materials flattening where dimensions scale changes appear as evident.

ADHESION FAILURES IN GRANULAR MIXTURES

BUONSANTI, Michele
2018

Abstract

Contact and detachment in granular materials represents a stimulating ques-tion about the mechanical aspects especially at microscale. In fact the phe-nomenon is the characterization of numerous materials degradation cases, likewise as damaging of asphalt mixture. Aim of this paper we will to suggest a first attempt and genuine model to simulate detachment between two granu-lar particles joined by a highly adhesive material. We develop the idea inside the hypo elasticity framework since the model will be able to simulate the classic behavior of the surface parts of road and/or runway pavements. The specific form of the mechanical contact between particles and adhesive take us to bring a deep investigation over the contact area. The great difference of either constitutive parameter involves careful consideration about the evolu-tion of the deformation field. The question take ours attention about a particu-lar framework built over the extreme elastic deformations concept, since ad-hesive materials is highly deformable. Therefore, we will be able to choice a specific form of the deformation energy proposing a simple mono-dimensional model simulating the transition from the surface body to a line body in according to materials flattening where dimensions scale changes appear as evident.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12318/12203
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