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Author Hwang, Ji Hoon ♦ Lee, Seonggi ♦ Hwang, So Young ♦ Kim, Naksoo
Source SpringerLink
Content type Text
Publisher Korean Society of Rheology, Australian Society of Rheology
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword mastic sealer ♦ blowing agent ♦ thermal property ♦ foaming model ♦ micro-deformation ♦ Characterization and Evaluation of Materials ♦ Polymer Sciences ♦ Soft and Granular Matter, Complex Fluids and Microfluidics ♦ Mechanical Engineering ♦ Food Science
Abstract In order to numerically simulate the foaming behavior of mastic sealer containing the blowing agent, a foaming and driving force model are needed which incorporate the foaming characteristics. Also, the elastic stress model is required to represent the material behavior of co-existing phase of liquid state and the cured polymer. It is important to determine the thermal properties such as thermal conductivity and specific heat because foaming behavior is heavily influenced by temperature change. In this study, three models are proposed to explain the foaming process and material behavior during and after the process. To obtain the material parameters in each model, following experiments and the numerical simulations are performed: thermal test, simple shear test and foaming test. The error functions are defined as differences between the experimental measurements and the numerical simulation results, and then the parameters are determined by minimizing the error functions. To ensure the validity of the obtained parameters, the confirmation simulation for each model is conducted by applying the determined parameters. The cross-verification is performed by measuring the foaming/shrinkage force. The results of cross-verification tended to follow the experimental results. Interestingly, it was possible to estimate the micro-deformation occurring in automobile roof surface by applying the proposed model to oven process analysis. The application of developed analysis technique will contribute to the design with minimized micro-deformation.
ISSN 1226119X
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-11-28
Publisher Place Heidelberg
e-ISSN 20937660
Journal Korea-Australia Rheology Journal
Volume Number 26
Issue Number 4
Page Count 12
Starting Page 389
Ending Page 400

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Source: SpringerLink