Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Quantitative Description of Grain Contacts in a Locked Sand
This chapter presents a methodology to characterize the fabric of natural locked sands based on the qualitative description of particle contacts. Using μCT images of intact soil, an algorithm was developed to identify and measure the contacts. Rather than classifying the contact intensity simply by using the coordination number (whose use is very common in discrete element analyses), the contact index parameter that considers the contact area was introduced. While the contact index tended to increase with coordination number, the two parameters are poorly correlated. The energy required to cause slip along the contacts (and hence deformation of the material) will be related to the contact area, rather than simply the coordination number. Use of the contact index parameter is particularly important for materials with non‐punctual contacts. Furthermore the 3D analysis has also revealed information that cannot be obtained by looking at 2D sections. sand
Quantitative Description of Grain Contacts in a Locked Sand
This chapter presents a methodology to characterize the fabric of natural locked sands based on the qualitative description of particle contacts. Using μCT images of intact soil, an algorithm was developed to identify and measure the contacts. Rather than classifying the contact intensity simply by using the coordination number (whose use is very common in discrete element analyses), the contact index parameter that considers the contact area was introduced. While the contact index tended to increase with coordination number, the two parameters are poorly correlated. The energy required to cause slip along the contacts (and hence deformation of the material) will be related to the contact area, rather than simply the coordination number. Use of the contact index parameter is particularly important for materials with non‐punctual contacts. Furthermore the 3D analysis has also revealed information that cannot be obtained by looking at 2D sections. sand
Quantitative Description of Grain Contacts in a Locked Sand
Alshibli, Khalid A. (Herausgeber:in) / Reed, Allen H. (Herausgeber:in) / Fonseca, J. (Autor:in) / O'Sullivan, C. (Autor:in) / Coop, M. R. (Autor:in)
01.03.2010
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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