caa a22 4500 46322373X CHVBK 20180405153220.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10853-007-1740-5 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1740-5 A recording microindentation instrument for insitu study of crack initiation in glass [Elektronische Daten] [Trevor Wilantewicz, James Varner] A recording microindentation instrument equipped with optical observation and acoustic emission detection was built and used to examine, insitu, the crack initiation behavior of a commercial soda-lime-silica based float glass from contact with a Vickers diamond indenter. Indenter motion was provided by a piezoelectric actuator, while a strain gage load cell and capacitance displacement gages simultaneously monitored the indenter load and displacement, respectively, on the glass. It was found that both the maximum load and total indenter contact time influence the initiation behavior. Crack initiation occurred more readily when the total contact time and maximum load were increased. Increasing the maximum load from 0.2kgf to 4kgf resulted in the initiation of median-radial cracks on unloading at 6% Fmax up to 50% Fmax, respectively. In contrast, the initiation of lateral cracks was not significantly affected by the total contact time or the maximum load. Examination of the indentation cross-sections beneath 1 and 4kgf indentation sites revealed well-developed median-radial and lateral crack systems. Springer Science+Business Media, LLC, 2007 Wilantewicz Trevor Impact Physics Branch, US Army Research Laboratory (ARL), ATTN: AMSRD-ARL-WM-TD, 21005, Aberdeen Proving Ground, MD, USA aut Varner James Impact Physics Branch, US Army Research Laboratory (ARL), ATTN: AMSRD-ARL-WM-TD, 21005, Aberdeen Proving Ground, MD, USA aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8529-8536 0022-2461 42:20<8529 2007 42 10853 https://doi.org/10.1007/s10853-007-1740-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1740-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wilantewicz Trevor Impact Physics Branch, US Army Research Laboratory (ARL), ATTN: AMSRD-ARL-WM-TD, 21005, Aberdeen Proving Ground, MD, USA aut NATIONALLICENCE 700 1- Varner James Impact Physics Branch, US Army Research Laboratory (ARL), ATTN: AMSRD-ARL-WM-TD, 21005, Aberdeen Proving Ground, MD, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8529-8536 0022-2461 42:20<8529 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer