Radial Inertia Effect on Dynamic Compressive Response of Polymeric Foam Materials

Song, Bo; Sanborn, Brett; Lu, Wei -Yang

doi:10.1007/s11340-018-0431-2

Radial Inertia Effect on Dynamic Compressive Response of Polymeric Foam Materials

Journal Article · Fri Oct 05 00:00:00 EDT 2018 · Experimental Mechanics

DOI:https://doi.org/10.1007/s11340-018-0431-2· OSTI ID:1477454

Song, Bo ^[1]; Sanborn, Brett ^[1]; Lu, Wei -Yang ^[2]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Polymeric foams have been extensively used in shock isolation applications because of their superior shock or impact energy absorption capability. However, as a type of soft condensed matter, the highly nonlinear, heterogeneous, and dissipative behavior of polymeric foams may result in an ineffective mitigation or isolation to shock/blast loading. To meet certain desired shock mitigation or isolation requirements, the polymeric foams need to be experimentally characterized to obtain their intrinsic material response. However, radial inertia during dynamic compression has become a severe issue and needs to be fully understood. In this study, we developed an analytical method to calculate the additional stress induced by radial inertia in a polymeric foam specimen. The radial inertia is generally caused by Poisson’s effect and associated with three different mechanisms – axial strain acceleration, large deformation, and Poisson’s ratio change. In conclusion, the effect of Poisson’s ratio change during deformation on radial inertia was specifically investigated for hyperelastic foam materials, and verified with experimental results obtained from Kolsky compression bar tests on a silicone foam.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1477454

Report Number(s):: SAND--2018-3446J; 663958

Journal Information:: Experimental Mechanics, Journal Name: Experimental Mechanics Journal Issue: 1 Vol. 59; ISSN 0014-4851

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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