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Title: Computational Exploration of Polyurethane Foam Yield and Failure Surfaces.

Abstract

Abstract not provided.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1147948
Report Number(s):
SAND2007-3403C
523093
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the ASME Summer Mechanics Conference held June 3-7, 2007 in Austin, TX.
Country of Publication:
United States
Language:
English

Citation Formats

Neilsen, Michael K., Lu, Wei-Yang, Kraynik, Andrew M., and Scherzinger, William M. Computational Exploration of Polyurethane Foam Yield and Failure Surfaces.. United States: N. p., 2007. Web.
Neilsen, Michael K., Lu, Wei-Yang, Kraynik, Andrew M., & Scherzinger, William M. Computational Exploration of Polyurethane Foam Yield and Failure Surfaces.. United States.
Neilsen, Michael K., Lu, Wei-Yang, Kraynik, Andrew M., and Scherzinger, William M. Tue . "Computational Exploration of Polyurethane Foam Yield and Failure Surfaces.". United States. doi:. https://www.osti.gov/servlets/purl/1147948.
@article{osti_1147948,
title = {Computational Exploration of Polyurethane Foam Yield and Failure Surfaces.},
author = {Neilsen, Michael K. and Lu, Wei-Yang and Kraynik, Andrew M. and Scherzinger, William M.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}

Conference:
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  • A novel, deep-bed filtration process based on polyurethane foam filtration was subjected to laboratory and pilot-plant studies with the effluent from a petrochemical-waste activated-sludge plant and was compared with a dual-media coal-sand filter under varied conditions, including different hydraulic loadings, influent suspended-solids levels, and particle size distributions. The foam filter was greatly inferior to the dual-media filter at influent solids levels of 85 mg/l., although solids levels of 185 mg/l. had little adverse effect on the foam filter's performance. The pilot-plant studies suggested that further scale-up would not lower performance.
  • Polyurethane foam plugs can be successfully used for concentration of trace quantities of benzo(a)pyrene and other PAH from water. The recovery is more or less independent of water flow rates but depends to a great extent on the temperature of the water. For efficient removal, the water temperature should be > 60/sup 0/C. Under these conditions a single foam plug placed in a 25 mm column can effectively retain PAH from up to 5 liters of tap water. For larger volumes, the number of plugs in the column must be proportionately increased.
  • Laboratory data are presented on the effect of constant-temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements--HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90 F, 40 F, and {minus}10 F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels containing foam enclosed between solid plastic sheets, and thin slices of core foam cut from similar panels. Results are presented for the first year of a multi-year study for the full-thickness panelsmore » and for about 1-1/2 years of aging for the core-foam specimens.« less
  • Uniaxial strain impact experiments have been performed to obtain shock compression and release response of a 0.22 g/cm{sup 3} polyurethane foam in a configuration where the foam impacts a thin target witness plate. Wave profiles from a suite of ten experiments have been obtained, where shock amplitudes range from 40 to 500 MPa. A traditional p-{alpha} porous material model generally captures the material response. A fully three-dimensional explicit representation of the heterogeneous foam structure modeled with numerical simulations recovers some of the high frequency aspects of the particle velocity records.
  • Sandia National Laboratories is developing polyurethane foam as a chemical grout for lost circulation zones. In past work polyurethane foam was tried with limited success in laboratory tests and GDO sponsored field tests. Goals were that the foam expanded significantly and harden to a chillable firmness quickly. Since that earlier work there have been improvements in polyurethane chemistry and the causes of the failures of previous tests have been identified. Recent success in applying pure solution grouts (proper classification of polyurethane--Naudts) in boreholes encourages reevaluating its use to control lost circulation. These successes include conformance control in the oil patchmore » (e.g. Ng) and darn remediation projects (Bruce et al.). In civil engineering, polyurethane is becoming the material of choice for sealing boreholes with large voids and high inflows, conditions associated with the worst lost circulation problems. Demonstration of a delivery mechanism is yet to be done in a geothermal borehole.« less