Poisson's Ratio of a Hyperelastic Foam Under Quasi-static and Dynamic Loading
- 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
Web of Science
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 |
Similar Records
The deformation and failure response of closed-cell PMDI foams subjected to dynamic impact loading
Radial Inertia Effect on Dynamic Compressive Response of Polymeric Foam Materials