A phenomenological constitutive model for low density polyurethane foams
Results from a series of hydrostatic and triaxial compression tests which were performed on polyurethane foams are presented in this report. These tests indicate that the volumetric and deviatoric parts of the foam behavior are strongly coupled. This coupling behavior could not be captured with any of several commonly used plasticity models. Thus, a new constitutive model was developed. This new model was based on a decomposition of the foam response into two parts: (1) response of the polymer skeleton, and (2) response of the air inside the cells. The air contribution was completely volumetric. The new constitutive model was implemented in two finite element codes, SANCHO and PRONTO. Results from a series of analyses completed with these codes indicated that the new constitutive model captured all of the foam behaviors that had been observed in the experiments. Finally, a typical dynamic problem was analyzed using the new constitutive model and other constitutive models to demonstrate differences between the models. Results from this series of analyses indicated that the new constitutive model generated displacement and acceleration predictions that were between predictions obtained using the other models. This result was expected. 9 refs., 45 figs., 4 tabs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6633017
- Report Number(s):
- SAND-86-2927; ON: DE87009108
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
Similar Records
Unified Creep Plasticity Damage (UCPD) Model for Rigid Polyurethane Foams.
A constitutive theory for rigid polyurethane foam
Related Subjects
42 ENGINEERING
FOAMS
MECHANICAL PROPERTIES
MECHANICAL TESTS
USES
POLYURETHANES
DENSITY
PLASTICITY
CONTAINERS
EXPERIMENTAL DATA
FINITE ELEMENT METHOD
HYDROSTATICS
P CODES
PACKAGING
S CODES
STRAINS
COLLOIDS
COMPUTER CODES
DATA
DISPERSIONS
INFORMATION
MATERIALS
MATERIALS TESTING
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYAMIDES
POLYMERS
SYNTHETIC MATERIALS
TESTING
360603* - Materials- Properties
420204 - Engineering- Shipping Containers