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A new method to calculate the equivalent Mohr–Coulomb friction angle for cohesive and frictional materials

International Journal for Numerical and Analytical Methods in Geomechanics, 2011
AbstractIn this note, a new method to calculate the equivalent Mohr–Coulomb friction angle ϕ′mc for cohesive and frictional materials is presented. This method makes a transformation from the failure surface for cohesive materials to the failure surface for cohesionless materials and obtains ϕ′mc as well as the principal stress ratio σ′1/σ′3 for ...
Jiang, Hua, Wang, Xiaowo
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The influence of friction time and contact angles in friction welding for Polyethylene pipes.

2011
3, 38, KKU Engineering ...
Surachai Junchana, Chawalit Thinvongpituk +1 more
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Nonmonotonic Angle-Dependent Friction on Twisted Bilayer Graphene

Nano Letters
Moiré superstructures in stacked two-dimensional (2D) materials offer a promising means for tailoring tribological properties, yet the experimental dependence of friction on continuously varying moiré patterns remains unexplored. Here, we systematically investigate the frictional response of twisted bilayer graphene (TBG) across twist angles from 0.3 ...
Mengzhen Zhu +5 more
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Angles of friction and dilatancy of sand

Géotechnique, 1996
T. Schanz, P. A. Vermeer
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True and Base Friction Angles of Clays