Viscoelastic Response of Closed-Cell Polyurethane Foams From Half Hour-Long Creep Tests: Identification of Lomnitz Behavior-Reference-Cited by-同舟云学术

Viscoelastic Response of Closed-Cell Polyurethane Foams From Half Hour-Long Creep Tests: Identification of Lomnitz Behavior

Published:2018-09-17 Issue:2 Volume:141 Page:
ISSN:0094-4289
Container-title:Journal of Engineering Materials and Technology
language:en
Short-container-title:

Author:

Pichler Christian¹,Maier Marcus¹,Lackner Roman²

Affiliation:

1. Material Technology Innsbruck, University of Innsbruck, Innsbruck A-6020, Austria e-mail:

2. Professor Material Technology Innsbruck, University of Innsbruck, Innsbruck A-6020, Austria e-mail:

Abstract

In this paper, a protocol for interpretation of static creep tests on closed-cell polyurethane foams is defined, considering the influence of a finite loading duration when identifying creep compliance parameters. Experiments were conducted at isothermal conditions with temperatures ranging from 20 to 120 °C. The experimental results indicate Lomnitz, i.e., logarithmic-type creep behavior. We discuss uniqueness of the backcalculated parameters. Furthermore, the viscoelastic material parameters obtained were verified in independent experiments: elastic compliance by ultrasonic wave velocity measurements, viscous material parameters by relaxation tests.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/materialstechnology/article-pdf/doi/10.1115/1.4040831/6138331/mats_141_02_021001.pdf

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