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Permanent link (DOI): https://doi.org/10.7939/R33N20T4S

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Micro-Scale Energy Dissipation Mechanisms During Fracture in Natural Polyphase Ceramic Blocks Open Access

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Author or creator
Hogan, James
Rogers, Robert
Spray, John
Boonsue, Suporn
Vincent, Gregory
Schneider, Markus
Additional contributors
Subject/Keyword
Thermal effects in cracking
Railgun impact experiment
Dynamic brittle fragmentation
Elastic heat dissipation in fracture
Micro-scale energy dissipation
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
The dynamic fracture of natural polyphase ceramic (granite) blocks by high-speed impact at 207 m/s, 420 m/s and 537 m/s has been investigated. An electromagnetic railgun was used as the launch system. Results reveal that the number of fragments increases substantially, and the dominant length scale in their probability distributions decreases, as the impact energy is increased. Micro-scale studies of the fracture surfaces reveals evidence of localized temperatures in excess of 2000 K brought on by frictional melting via fracturing and slip along grain boundaries in orthoclase and plagioclase, and via transgranular fracture (micro-cracking) in quartz. The formation of SiO2- and TiO2-rich spheroids on fracture surfaces indicates that temperatures in excess of 3500 K are reached during fracture.
Date created
2011
DOI
doi:10.7939/R33N20T4S
License information

Rights
Attribution-NonCommerical-NoDerivs 4.0 International
Citation for previous publication
Hogan, James, Spray, John, Rogers, Robert, Boonsue, Suporn, Vincent, Gregory, & Schneider, Markus. (2011). Micro-Scale Energy Dissipation Mechanisms During Fracture in Natural Polyphase Ceramic Blocks. International Journal of Impact Engineering, 38(12), 931-939.  http://dx.doi.org/10.1016/j.ijimpeng.2011.06.004

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