TY - JOUR
T1 - Radial and axial inertia stresses in high strain rate deformation of polymer foams
AU - Koohbor, Behrad
AU - Singh, Nand Kishore
AU - Kidane, Addis
N1 - Funding Information:
The authors wish to thank Dr. Suraj Ravindran for providing assistance and valuable discussions with the SHPB experiments. This work was supported in part by the Rowan University faculty startup fund.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Polymer foams are widely used in applications that require impact energy absorption. Experimental characterization of the impact response of polymer foams is challenging. The primary challenges associated with the characterization of polymer foams in high strain rate conditions are the significant effects of inertia and material compressibility. In this work, we develop analytical solutions for radial and axial inertia stresses that develop during high strain rate deformation of polymer foams. The effects of strain rate increase rate, test piece geometry, density, and Poisson's ratio are discussed in detail. We also provide and discuss results from a case study on the impact response of a closed-cell foam subjected to controlled impact loading, focusing on the importance of inertial effects on the characterization of the dynamic stress-strain response. The analytical approach presented in this work facilitates the determination of the concurrent effects of material compressibility and inertia stresses in the dynamic deformation response of compressible materials.
AB - Polymer foams are widely used in applications that require impact energy absorption. Experimental characterization of the impact response of polymer foams is challenging. The primary challenges associated with the characterization of polymer foams in high strain rate conditions are the significant effects of inertia and material compressibility. In this work, we develop analytical solutions for radial and axial inertia stresses that develop during high strain rate deformation of polymer foams. The effects of strain rate increase rate, test piece geometry, density, and Poisson's ratio are discussed in detail. We also provide and discuss results from a case study on the impact response of a closed-cell foam subjected to controlled impact loading, focusing on the importance of inertial effects on the characterization of the dynamic stress-strain response. The analytical approach presented in this work facilitates the determination of the concurrent effects of material compressibility and inertia stresses in the dynamic deformation response of compressible materials.
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U2 - 10.1016/j.ijmecsci.2020.105679
DO - 10.1016/j.ijmecsci.2020.105679
M3 - Article
AN - SCOPUS:85085655115
VL - 181
JO - International Journal of Mechanical Sciences
JF - International Journal of Mechanical Sciences
SN - 0020-7403
M1 - 105679
ER -