On the bulk compaction of brittle granular materials, Part II: Representing interparticle comminution by <i>K</i> _COMP ^*

Abstract An applied and empirical compaction fracture resistance parameter, K COMP , was developed to represent the compression‐induced interparticle‐comminution response of granular brittle materials (e.g., ceramic or glass particles). The development of K COMP is an outcome from Part I of this three‐paper series. The K COMP represents a continuum response of compaction fracture resistance and was adapted from established Griffith linear elastic fracture mechanics theory. From that, the K COMP relates macroscopically applied compressive stress to a corresponding inverse‐square‐root representative particle size, where the latter is estimated from an entire particle size distribution or specific surface area measurement. The K COMP value was not constant over a wide range of stresses for all examined brittle granular materials, and this is indicative of a change in the dominant mode of permanent deformation at higher compaction stresses.