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Shear band analysis for granular materials: The question of incremental non-linearity

Scherfugenanalyse für granulare Stoffe: Die Frage inkrementeller Nichtlinearität

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Summary

Shear band analysis is a theoretical approach for the phenomenon of deformation localization, a characteristic aspect of rupture in geomaterials. It is closely related to advanced soil modelling, because the constitutive equations describing the material behaviour play the central role in that analysis. One of the basic features of geomaterials' behaviour is non-reversibility. Soil models have to incorporate some kind of incremental non-linearity to take irreversibility into account. Depending on the actual type of the considered non-linearity shear band analysis must be conducted in different ways. The basic equations of shear band analysis are presented, introducing a comprehensive discussion of the different cases to be considered with respect to the different types of non-linearity incorporated in the formulation of constitutive equations.

Übersicht

Die Scherfugenanalyse ist ein theoretischer Ansatz für das Phänomen der Lokalisierung von Verformungen, welches für den Bruch von geologischem Material charakteristisch ist. Die Scherfugenanalyse steht in engem Zusammenhang mit der Modellierung des Stoffverhaltens von Böden, da die Stoffgleichungen eine zentrale Rolle bei dieser Analyse spielen. Ein Grundmerkmal von geologischen Stoffen ist die Irreversibilität. Deshalb müssen Stoffmodelle für Böden in irgendeiner Weise inkrementelle Nichtlinearität beinhalten. In Abhängigkeit von der Art der Nichtlinearität muß die Scherfugenanalyse auf verschiedenen Wegen durchgeführt werden. Die Grundgleichungen der Scherfugenanalyse werden vorgestellt. Umfassend werden die Fallunterscheidungen erörtert, die bei den unterschiedlichen Arten der Nichtlinearität zu beachten sind.

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Desrues, J., Chambon, R. Shear band analysis for granular materials: The question of incremental non-linearity. Ing. arch 59, 187–196 (1989). https://doi.org/10.1007/BF00532249

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