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Title: Age-aware materials model for foam cushions - considering time-dependence of strain-rates and rate-independent measurements

Abstract

Over the last few reports we have chronicled the progressive development of an age-aware materials model for foam cushions relevant to our systems. The latest version employs a N = 2 Ogden Hyperfoam model within a two-network Tobolsky scheme. As the material ages, the first network progressively loses in strength, while the second network progressively gains in strength. However, the two networks are in different strain states. Thus, in additive equilibrium (Tobolsky model) they manifest both permanent structural changes (measured as Compression Set) as well as changes in mechanical strength and modulus (measured as Load Retention).

Authors:
 [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1491988
Report Number(s):
LLNL-TR-765205
955257
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
Materials science

Citation Formats

Maiti, A. Age-aware materials model for foam cushions - considering time-dependence of strain-rates and rate-independent measurements. United States: N. p., 2019. Web. doi:10.2172/1491988.
Maiti, A. Age-aware materials model for foam cushions - considering time-dependence of strain-rates and rate-independent measurements. United States. doi:10.2172/1491988.
Maiti, A. Tue . "Age-aware materials model for foam cushions - considering time-dependence of strain-rates and rate-independent measurements". United States. doi:10.2172/1491988. https://www.osti.gov/servlets/purl/1491988.
@article{osti_1491988,
title = {Age-aware materials model for foam cushions - considering time-dependence of strain-rates and rate-independent measurements},
author = {Maiti, A.},
abstractNote = {Over the last few reports we have chronicled the progressive development of an age-aware materials model for foam cushions relevant to our systems. The latest version employs a N = 2 Ogden Hyperfoam model within a two-network Tobolsky scheme. As the material ages, the first network progressively loses in strength, while the second network progressively gains in strength. However, the two networks are in different strain states. Thus, in additive equilibrium (Tobolsky model) they manifest both permanent structural changes (measured as Compression Set) as well as changes in mechanical strength and modulus (measured as Load Retention).},
doi = {10.2172/1491988},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}