Shear Resistance Variations in Experimentally Sheared Mudstone Granules: A Possible Shear‐Thinning and Thixotropic Mechanism

@article{Hu2017ShearRV,
  title={Shear Resistance Variations in Experimentally Sheared Mudstone Granules: A Possible Shear‐Thinning and Thixotropic Mechanism},
  author={Wei Hu and Qiang Xu and Gonghui Wang and Gianvito Scaringi and Mauri McSaveney and P-Y. Hicher},
  journal={Geophysical Research Letters},
  year={2017},
  volume={44},
  pages={11,040 - 11,050}
}
We present results of ring shear frictional resistance for mudstone granules of different size obtained from a landslide shear zone. Little rate dependency of shear resistance was observed in sand‐sized granules in any wet or dry test, while saturated gravel‐sized granules exhibited significant and abrupt reversible rate‐weakening (from μ = 0.6 to 0.05) at about 2 mm/s. Repeating resistance variations occurred also under constant shear displacement rate. Mudstone granules generate mud as they… 
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