TY - JOUR
T1 - Design considerations to improve charpy instrumented strikers
AU - Vlajic, Nicholas
AU - Chijioke, Ako
AU - Lucon, Enrico
N1 - Publisher Copyright:
© 2020 National Institute of Standards and Technology. All rights reserved.
PY - 2020/3/16
Y1 - 2020/3/16
N2 - Instrumented impact testing allows the applicability of conventional Charpy tests to be extended toward assessing mechanical properties such as dynamic fracture toughness and dynamic tensile properties. In this work, we present design considerations for engineering instrumented strikers for Charpy V-notch impact testing. Specific attention is given to the mechanical and geometric features, as well as the placement of strain gauges and corresponding bridge circuits for instrumentation. These design considerations are intended to make the sensitivity invariant to the location and distribution of impact forces. The concepts presented in this work were applied to an actual instrumented striker, which was then statically calibrated. Data from this calibration indicate that the device has good repeatability, shows a linear response, and is relatively insensitive to impact location.
AB - Instrumented impact testing allows the applicability of conventional Charpy tests to be extended toward assessing mechanical properties such as dynamic fracture toughness and dynamic tensile properties. In this work, we present design considerations for engineering instrumented strikers for Charpy V-notch impact testing. Specific attention is given to the mechanical and geometric features, as well as the placement of strain gauges and corresponding bridge circuits for instrumentation. These design considerations are intended to make the sensitivity invariant to the location and distribution of impact forces. The concepts presented in this work were applied to an actual instrumented striker, which was then statically calibrated. Data from this calibration indicate that the device has good repeatability, shows a linear response, and is relatively insensitive to impact location.
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U2 - 10.6028/JRES.125.010
DO - 10.6028/JRES.125.010
M3 - Article
AN - SCOPUS:85088680470
SN - 1044-677X
VL - 125
JO - Journal of Research of the National Institute of Standards and Technology
JF - Journal of Research of the National Institute of Standards and Technology
M1 - 125010
ER -