Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published October 15, 1992 | Published
Journal Article Open

Performance of the star‐shaped flyer in the study of brittle materials: Three dimensional computer simulations and experimental observations

Abstract

A three dimensional finite element computer simulation has been performed to assess the effects of release waves in normal impact soft‐recovery experiments when a star‐shaped flyer plate is used. Their effects on the monitored velocity‐time profiles have been identified and their implications in the interpretation of wave spreading and spall signal events highlighted. The calculation shows that the star‐shaped flyer plate indeed minimizes the magnitude of edge effects. The major perturbation to the one‐dimensional response within the central region of the target plate results from spherical waves emanating from the corners of the star‐shaped plate. Experimental evidence of the development of a damage ring located in coincidence with the eight entrant corners of the flyer plate is reported. Microscopy studies performed in the intact recovered samples revealed that this damage ring eliminates undesired boundary release waves within the central region of the specimen. Consequently, the observed damage in compression and tension within this region can be attributed primarily to the conditions arising from a state of uniaxial strain.

Additional Information

© 1992 American Institute of Physics. (Received 27 March 1992; accepted for publication 30 June 1992) This research was supported by the National Science Foundation through its support of the MRG on Micromechanics of Failure-Resistant Materials. We acknowledge the support of Lanxide Armor Products, Inc. in providing the AlN/AlN/Al composite material samples

Attached Files

Published - EspinosaRaiserCliftonOrtiz1992.pdf

Files

EspinosaRaiserCliftonOrtiz1992.pdf
Files (901.6 kB)
Name Size Download all
md5:0edf1104fcd5f80046ff65ca125f49b8
901.6 kB Preview Download

Additional details

Created:
August 20, 2023
Modified:
October 18, 2023