TY - GEN
T1 - Dynamic flow response of rigid polymer foam subjected to direct impact
AU - Koohbor, Behrad
AU - Kidane, Addis
AU - Lu, Wei Yang
N1 - Funding Information:
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy?s National Nuclear Security Administration under contract DEAC04- 94AL85000.
Publisher Copyright:
©The Society for Experimental Mechanics, Inc. 2016.
PY - 2016
Y1 - 2016
N2 - In this work, the dynamic response of closed-cell PMDI foam specimens with different initial densities subjected to direct impact loading was investigated using a shock-tube apparatus and digital image correlation. Cylindrical foam specimens with different densities were affixed on a rigid frame on one side while the impact load was applied to the other side. The full-field deformation of the polymeric foam specimen during the loading process was captured using stereovision high speed camera system. The load was measured using quartz impact force sensors located between the rigid frame and the specimen, while the full-field displacement and strain distributions were obtained using 3D DIC. A simple one-dimensional model was also proposed to calculate the change of specimen density at any given time during the deformation. The inertia stresses developed during high strain rate deformation were determined using the instantaneous density and the full-field acceleration distribution obtained from the displacement field measured by DIC. By using the load cell data, the calculated inertia stresses and the strain components obtained from DIC, the full field stress-strain distribution over the entire region of interest was extracted. The average stress-strain response of the specimens was also presented as a function of foam density.
AB - In this work, the dynamic response of closed-cell PMDI foam specimens with different initial densities subjected to direct impact loading was investigated using a shock-tube apparatus and digital image correlation. Cylindrical foam specimens with different densities were affixed on a rigid frame on one side while the impact load was applied to the other side. The full-field deformation of the polymeric foam specimen during the loading process was captured using stereovision high speed camera system. The load was measured using quartz impact force sensors located between the rigid frame and the specimen, while the full-field displacement and strain distributions were obtained using 3D DIC. A simple one-dimensional model was also proposed to calculate the change of specimen density at any given time during the deformation. The inertia stresses developed during high strain rate deformation were determined using the instantaneous density and the full-field acceleration distribution obtained from the displacement field measured by DIC. By using the load cell data, the calculated inertia stresses and the strain components obtained from DIC, the full field stress-strain distribution over the entire region of interest was extracted. The average stress-strain response of the specimens was also presented as a function of foam density.
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U2 - 10.1007/978-3-319-22452-7_23
DO - 10.1007/978-3-319-22452-7_23
M3 - Conference contribution
AN - SCOPUS:84951957020
SN - 9783319224510
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 163
EP - 170
BT - Dynamic Behavior of Materials - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
A2 - Kimberley, Jamie
A2 - Casem, Daniel
A2 - Song, Bo
A2 - Lamberson, Leslie
PB - Springer New York LLC
T2 - Annual Conference and Exposition on Experimental and Applied Mechanics, 2015
Y2 - 8 June 2015 through 11 June 2015
ER -