An exact expression of three-body system for the complex shear modulus of frictional granular materials
Michio Otsuki1, Hisao Hayakawa2
1Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan. m.otsuki.es@osaka-u.ac.jp.
Abstract:
We propose a simple model comprising three particles to study the nonlinear mechanical response of jammed frictional granular materials under oscillatory shear. Owing to the introduction of the simple model, we obtain an exact analytical expression of the complex shear modulus for a system including many monodispersed disks, which satisfies a scaling law in the vicinity of the jamming point. These expressions perfectly reproduce the shear modulus of the many-body system with low strain amplitudes and friction coefficients. Even for disordered many-body systems, the model reproduces the results by introducing a single fitting parameter.
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