Abstract
The most common use of the Taylor impact test is not to measure the dynamic flow stresses of materials, but to validate and/or calibrate constitutive models by comparing the shapes of recovered cylinders with computer predictions. Importantly, the Taylor test provides a link between the intermediate strain rates of the split-Hopkinson bar and the extremely high strain rates of the plate impact test. While round specimens (essentially a 2D experiment) are commonly used, square samples have the advantage of providing a true three dimensional experimental setting. In particular, the interaction of release waves along the diagonals allows for the possibility of geometric strain localization which suggests shear banding. We performed round and square Taylor impacts on 6-4 Titanium (a known shear banding material) to see if we could observe differences in behavior. We observed that square specimens undergo significantly larger amounts of shear band deformation when compared to round bars at a given velocity. As the velocity is increased, the round bars begin to exhibit the behavior of lower velocity square bars.
Cazamias, James U
[1]
- LLNL, L-414, PO Box 808, Livermore, CA 94551 (United States)
Citation Formats
Cazamias, James U.
The effects of shear banding in 6-4 titanium on round and square Taylor impacts.
United States: N. p.,
2002.
Web.
doi:10.1063/1.1483607.
Cazamias, James U.
The effects of shear banding in 6-4 titanium on round and square Taylor impacts.
United States.
https://doi.org/10.1063/1.1483607
Cazamias, James U.
2002.
"The effects of shear banding in 6-4 titanium on round and square Taylor impacts."
United States.
https://doi.org/10.1063/1.1483607.
@misc{etde_20621007,
title = {The effects of shear banding in 6-4 titanium on round and square Taylor impacts}
author = {Cazamias, James U}
abstractNote = {The most common use of the Taylor impact test is not to measure the dynamic flow stresses of materials, but to validate and/or calibrate constitutive models by comparing the shapes of recovered cylinders with computer predictions. Importantly, the Taylor test provides a link between the intermediate strain rates of the split-Hopkinson bar and the extremely high strain rates of the plate impact test. While round specimens (essentially a 2D experiment) are commonly used, square samples have the advantage of providing a true three dimensional experimental setting. In particular, the interaction of release waves along the diagonals allows for the possibility of geometric strain localization which suggests shear banding. We performed round and square Taylor impacts on 6-4 Titanium (a known shear banding material) to see if we could observe differences in behavior. We observed that square specimens undergo significantly larger amounts of shear band deformation when compared to round bars at a given velocity. As the velocity is increased, the round bars begin to exhibit the behavior of lower velocity square bars.}
doi = {10.1063/1.1483607}
journal = []
issue = {1}
volume = {620}
journal type = {AC}
place = {United States}
year = {2002}
month = {Jul}
}
title = {The effects of shear banding in 6-4 titanium on round and square Taylor impacts}
author = {Cazamias, James U}
abstractNote = {The most common use of the Taylor impact test is not to measure the dynamic flow stresses of materials, but to validate and/or calibrate constitutive models by comparing the shapes of recovered cylinders with computer predictions. Importantly, the Taylor test provides a link between the intermediate strain rates of the split-Hopkinson bar and the extremely high strain rates of the plate impact test. While round specimens (essentially a 2D experiment) are commonly used, square samples have the advantage of providing a true three dimensional experimental setting. In particular, the interaction of release waves along the diagonals allows for the possibility of geometric strain localization which suggests shear banding. We performed round and square Taylor impacts on 6-4 Titanium (a known shear banding material) to see if we could observe differences in behavior. We observed that square specimens undergo significantly larger amounts of shear band deformation when compared to round bars at a given velocity. As the velocity is increased, the round bars begin to exhibit the behavior of lower velocity square bars.}
doi = {10.1063/1.1483607}
journal = []
issue = {1}
volume = {620}
journal type = {AC}
place = {United States}
year = {2002}
month = {Jul}
}