A breakage model for particulate solids under impact loading

This paper presents a breakage model of particulate solids under impact loading based on a mechanical approach. Existing breakage models are assessed using the experimental data from single particle impact tests, indicating a more general breakage model is required. Indentation fracture mechanics is used to account for surface damage under dynamic loading. The effect of impact angle is considered in the model, which rationalizes the contribu-tions of both the normal and tangential impact velocity. A unified curve of breakage propensity is constructed using the equivalent velocity under oblique impact based on the experimental data from this study and the liter-ature. This model provides a basis to evaluate breakage propensity of brittle/semi-brittle particles subject to oblique impact and the proposed equivalent velocity has a potential to improve the description of impact energy spectra for milling processes where oblique impact of particle is common and typically ignored. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study introduces a mechanical-based breakage model for particulate solids under impact loading and evaluates existing models, leading to a more general model. The model considers the impact angle and proposes an equivalent velocity to describe the breakage propensity of particles under oblique impact. This model has the potential to improve the description of impact energy spectra in milling processes where oblique impact is common but often ignored.