The kinetics of polyurethane structural foam formation: Foaming and polymerization

RR Rao, LA Mondy, KN Long, MC Celina… - AIChE …, 2017 - Wiley Online Library
Kinetic models have been developed to understand the manufacturing of polymeric foams,
which evolve from low viscosity Newtonian liquids, to bubbly liquids, finally producing solid …

Density predictions using a finite element/level set model of polyurethane foam expansion and polymerization

R Rao, L Mondy, D Noble, V Brunini, K Long… - Computers & …, 2018 - Elsevier
Polyurethane foams are used widely for encapsulation and structural purposes because
they are inexpensive, straightforward to process, amenable to a wide range of density …

Rheological tests of polyurethane foam undergoing vesiculation-deformation-solidification as a magma analogue

S Takeda, M Ohashi, O Kuwano, M Kameda… - Journal of Volcanology …, 2020 - Elsevier
In this study, we examined the rheology of polyurethane foam (PUF) as an analogue system
of magma undergoing vesiculation, deformation, and solidification. Solid PUF was formed by …

Bubble‐scale observations of polyurethane foam expansion

C Roberts, L Mondy, G Soehnel, C Brady… - AIChE …, 2022 - Wiley Online Library
We describe experiments designed to inform computational models of the dynamic filling
process of chemically blown, polyurethane foams, especially subgrid models to predict …

[HTML][HTML] Formation of tube-pumice structure under pure shear: Insights from extension tests of solidifying foam

M Ohashi, M Ichihara, S Takeda, K Hirota… - Journal of Volcanology …, 2020 - Elsevier
Tube pumice, the bubbles of which are highly elongated in one direction, is a common
product of explosive silicic eruptions, especially caldera-forming eruptions. To understand …

Material Models and Credibility for System Level Abnormal Mechanical ModSim Applications

KN Karlson, KN Long, JJ Dike - 2021 - osti.gov
The purpose of this document is to provide evidence for assessing the adequacy of
parameterized material models for a collection of materials used in a finite element analyses …

Bubble-size evolution during polyurethane foam expansion

LA Mondy, CC Roberts, G Soehnel, C Brady… - 2016 - osti.gov
We are developing computational models to elucidate the expansion and dynamic filling
process of a polyurethane (PMDI) foam used to encapsulate electronic components or to …

Experiments to Populate and Validate a Processing Model for Polyurethane Foam: Additional Data for Structural Foams

RR Rao, MC Celina, NH Giron, KN Long, EM Russick - 2015 - osti.gov
We are developing computational models to help understand manufacturing processes, final
properties and aging of structural foam, polyurethane PMDI. Th e resulting model predictions …