Yielding of granular materials

摘要: This paper examines the yielding of brittle granular materials subjected to one-dimensional compression. For an aggregate uniform grains, at low stresses there is negligible reduction in voids ratio, and high ratio reduces approximately logarithmically with stress as a distribution particle sizes evolves. A suitable definition yield would appear be point maximum curvature on plot against logarithm stress, corresponding onset grain fracture. It proposed that proportional average or Weibull 37% tensile strength particles aggregate. One-dimensional compression tests were performed aggregates breakfast cereals, (cornflakes, rice krispies) pasta compared results for typical test dense silica sand much higher levels. In addition, strengths 30 each material determined by between flat platens, found satisfy distribution. if plotted then occurs lower cereals than sand, typically two orders magnitude. However, normalised constituent region same. confirms suitable, this way grains. The constant proportionality range 0.1–0.3, consistent observed heterogeneous distributions discrete element simulations.