The Dynamic Response of Etnean Sand and the Effect of Its Impingement on Ti-6Al-4 V Alloy
- Resource Type
- Original Paper
- Authors
- Pellegrino, A.; De Cola, F.; Dragnevski, K.; Petrinic, N.
- Source
- Journal of Dynamic Behavior of Materials. December 2016 2(4):438-451
- Subject
- Granular materials
High strain rate
Hopkinson bar
Abrasion
Wear
- Language
- English
- ISSN
- 2199-7446
2199-7454
Quasi static and dynamic experiments were conducted to characterise the mechanical response of Etnean volcanic sand. Stress and strain histories were measured in near-uniaxial strain and near-uniaxial stress conditions at strain rates ranging between 5·10−4 and 1.5·103 s−1 using bespoke experimental setups. The effects of the lateral confinement and initial consolidation state were assessed. Etnean volcanic sand exhibited a noticeable strain rate dependent behaviour when characterised in its loose consolidation state but not when densely packed before loading. The effect of volcanic particles impingement on Ti-6Al-4 V alloy was assessed by conducting dynamic experiments at different incident angles using targets of different geometry. The texture of thus eroded surfaces was analyzed by means of non-contact 3D-profilometry. The surface analysis provided insights on the erosion mechanisms and quantitative data on the roughness increment caused by the collision and rubbing with volcanic sand.