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.
Skip Nav Destination
Article navigation
15 October 1992
Research Article|
October 15 1992
Performance of the star‐shaped flyer in the study of brittle materials: Three dimensional computer simulations and experimental observations
H. D. Espinosa;
H. D. Espinosa
Division of Engineering, Brown University, Providence, Rhode Island 02912
Search for other works by this author on:
G. Raiser;
G. Raiser
Division of Engineering, Brown University, Providence, Rhode Island 02912
Search for other works by this author on:
R. J. Clifton;
R. J. Clifton
Division of Engineering, Brown University, Providence, Rhode Island 02912
Search for other works by this author on:
M. Ortiz
M. Ortiz
Division of Engineering, Brown University, Providence, Rhode Island 02912
Search for other works by this author on:
J. Appl. Phys. 72, 3451–3457 (1992)
Article history
Received:
March 27 1992
Accepted:
June 30 1992
Citation
H. D. Espinosa, G. Raiser, R. J. Clifton, M. Ortiz; Performance of the star‐shaped flyer in the study of brittle materials: Three dimensional computer simulations and experimental observations. J. Appl. Phys. 15 October 1992; 72 (8): 3451–3457. https://doi.org/10.1063/1.351419
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00