Open AccessModelling the mechanical response ofurushilacquer subject to a change in relative humidity
Author(s) -
X. Liu,
Ricky Wildman,
Ian Ashcroft,
A. E. Elmahdy,
Pablo D. Ruiz
Publication year - 2012
Publication title -
proceedings of the royal society a mathematical physical and engineering sciences
Language(s) - English
Resource type - Journals
eISSN - 1471-2946
pISSN - 1364-5021
DOI - 10.1098/rspa.2012.0008
Subject(s) - lacquer , relative humidity , humidity , viscoelasticity , materials science , finite element method , phenomenological model , substrate (aquarium) , layer (electronics) , composite material , moisture , structural engineering , engineering , mathematics , thermodynamics , geology , physics , statistics , oceanography , coating
This article is closed access.A hygromechanical model has been developed to simulate the in-service behaviour of\udthe natural lacquer urushi, using a phenomenological description of viscoelasticity. The\udmaterial and mechanical properties were determined as a function of the relative humidity\ud(RH), and the relationship between RH and moisture content was determined. These\udproperties served as inputs to a finite-element-based model that was then tested against\udexperimental measurements of the depth-averaged stresses in a thin layer of urushi\uddeposited on a substrate and exposed to changes in the environmental conditions. Good\udagreement was seen between the predicted and measured behaviour. The validated model\udwas used to investigate the spatial and temperature variation of stress in urushi films\udsubjected to cyclic environmental conditioning
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