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Title: Poisson's Ratio of a Hyperelastic Foam Under Quasi-static and Dynamic Loading

Journal Article · · International Journal of Impact Engineering
 [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Poisson's ratio is a material constant representing compressibility of material volume. However, when soft, hyperelastic materials such as silicone foam are subjected to large deformation into densification, the Poisson's ratio may rather significantly change, which warrants careful consideration in modeling and simulation of impact/shock mitigation scenarios where foams are used as isolators. The evolution of Poisson's ratio of silicone foam materials has not yet been characterized, particularly under dynamic loading. In this study, radial and axial measurements of specimen strain are conducted simultaneously during quasi-static and dynamic compression tests to determine the Poisson's ratio of silicone foam. The Poisson's ratio of silicone foam exhibited a transition from compressible to nearly incompressible at a threshold strain that coincided with the onset of densification in the material. Poisson's ratio as a function of engineering strain was different at quasi-static and dynamic rates. Here, the Poisson's ratio behavior is presented and can be used to improve constitutive modeling of silicone foams subjected to a broad range of mechanical loading.

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:
1457403
Report Number(s):
SAND-2018-1802J; PII: S0734743X1830160X
Journal Information:
International Journal of Impact Engineering, Vol. 123, Issue 2019; ISSN 0734-743X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Cited By (3)

High Rate Compressive Behaviour of a Dilatant Polymeric Foam journal September 2018
Energy Dissipation Characteristics in Pre-strained Silicone Foam Transitioning to Silicone Rubber journal February 2019
A miniature multi-pulse series loading Hopkinson bar experimental device based on an electromagnetic launch journal February 2019

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