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Title: Assessing the Validity of the Simplified Potential Energy Clock Model for Modeling Glass-Ceramics

Abstract

Glass-ceramic seals may be the future of hermetic connectors at Sandia National Laboratories. They have been shown capable of surviving higher temperatures and pressures than amorphous glass seals. More advanced finite-element material models are required to enable model-based design and provide evidence that the hermetic connectors can meet design requirements. Glass-ceramics are composite materials with both crystalline and amorphous phases. The latter gives rise to (non-linearly) viscoelastic behavior. Given their complex microstructures, glass-ceramics may be thermorheologically complex, a behavior outside the scope of currently implemented constitutive models at Sandia. However, it was desired to assess if the Simplified Potential Energy Clock (SPEC) model is capable of capturing the material response. Available data for SL 16.8 glass-ceramic was used to calibrate the SPEC model. Model accuracy was assessed by comparing model predictions with shear moduli temperature dependence and high temperature 3-point bend creep data. It is shown that the model can predict the temperature dependence of the shear moduli and 3- point bend creep data. Analysis of the results is presented. Suggestions for future experiments and model development are presented. Though further calibration is likely necessary, SPEC has been shown capable of modeling glass-ceramic behavior in the glass transition region butmore » requires further analysis below the transition region.« less

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1399339
Report Number(s):
SAND-2017-10893
657659
DOE Contract Number:
AC04-94AL85000; NA0003525
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Jamison, Ryan Dale, Grillet, Anne M., Stavig, Mark E., Strong, Kevin, and Dai, Steve Xunhu. Assessing the Validity of the Simplified Potential Energy Clock Model for Modeling Glass-Ceramics. United States: N. p., 2017. Web. doi:10.2172/1399339.
Jamison, Ryan Dale, Grillet, Anne M., Stavig, Mark E., Strong, Kevin, & Dai, Steve Xunhu. Assessing the Validity of the Simplified Potential Energy Clock Model for Modeling Glass-Ceramics. United States. doi:10.2172/1399339.
Jamison, Ryan Dale, Grillet, Anne M., Stavig, Mark E., Strong, Kevin, and Dai, Steve Xunhu. 2017. "Assessing the Validity of the Simplified Potential Energy Clock Model for Modeling Glass-Ceramics". United States. doi:10.2172/1399339. https://www.osti.gov/servlets/purl/1399339.
@article{osti_1399339,
title = {Assessing the Validity of the Simplified Potential Energy Clock Model for Modeling Glass-Ceramics},
author = {Jamison, Ryan Dale and Grillet, Anne M. and Stavig, Mark E. and Strong, Kevin and Dai, Steve Xunhu},
abstractNote = {Glass-ceramic seals may be the future of hermetic connectors at Sandia National Laboratories. They have been shown capable of surviving higher temperatures and pressures than amorphous glass seals. More advanced finite-element material models are required to enable model-based design and provide evidence that the hermetic connectors can meet design requirements. Glass-ceramics are composite materials with both crystalline and amorphous phases. The latter gives rise to (non-linearly) viscoelastic behavior. Given their complex microstructures, glass-ceramics may be thermorheologically complex, a behavior outside the scope of currently implemented constitutive models at Sandia. However, it was desired to assess if the Simplified Potential Energy Clock (SPEC) model is capable of capturing the material response. Available data for SL 16.8 glass-ceramic was used to calibrate the SPEC model. Model accuracy was assessed by comparing model predictions with shear moduli temperature dependence and high temperature 3-point bend creep data. It is shown that the model can predict the temperature dependence of the shear moduli and 3- point bend creep data. Analysis of the results is presented. Suggestions for future experiments and model development are presented. Though further calibration is likely necessary, SPEC has been shown capable of modeling glass-ceramic behavior in the glass transition region but requires further analysis below the transition region.},
doi = {10.2172/1399339},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month =
}

Technical Report:

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