The deformation and failure response of closed-cell PMDI foams subjected to dynamic impact loading

Koohbor, Behrad; Mallon, Silas; Kidane, Addis; Lu, Wei -Yang

doi:10.1016/j.polymertesting.2015.03.016

Title: The deformation and failure response of closed-cell PMDI foams subjected to dynamic impact loading

Journal Article · Tue Apr 07 00:00:00 EDT 2015 · Polymer Testing

DOI:https://doi.org/10.1016/j.polymertesting.2015.03.016· OSTI ID:1235336

Koohbor, Behrad ^[1]; Mallon, Silas ^[1]; Kidane, Addis ^[1]; Lu, Wei -Yang ^[2]

Univ. of South Carolina, Columbia, SC (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)

The present work aims to investigate the bulk deformation and failure response of closed-cell Polymeric Methylene Diphenyl Diisocyanate (PMDI) foams subjected to dynamic impact loading. First, foam specimens of different initial densities are examined and characterized in quasi-static loading conditions, where the deformation behavior of the samples is quantified in terms of the compressive elastic modulus and effective plastic Poisson's ratio. Then, the deformation response of the foam specimens subjected to direct impact loading is examined by taking into account the effects of material compressibility and inertia stresses developed during deformation, using high speed imaging in conjunction with 3D digital image correlation. The stress-strain response and the energy absorption as a function of strain rate and initial density are presented and the bulk failure mechanisms are discussed. As a result, it is observed that the initial density of the foam and the applied strain rates have a substantial influence on the strength, bulk failure mechanism and the energy dissipation characteristics of the foam specimens.

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

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

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1235336

Alternate ID(s):: OSTI ID: 1476942

Report Number(s):: SAND-2015-0445J; 562342

Journal Information:: Polymer Testing, Vol. 44, Issue C; ISSN 0142-9418

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 23 works

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36 MATERIALS SCIENCE
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