A mechanical model for creep, recovery and stress relaxation in polymeric materials

被引:150
作者
Fancey, KS [1 ]
机构
[1] Univ Hull, Dept Engn, Kingston Upon Hull HU6 7RX, N Humberside, England
关键词
D O I
10.1007/s10853-005-2020-x
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A mechanical model is presented, in which viscoelastic response is described by the action of time-dependent latch elements. The model represents viscoelastic changes occurring through incremental jumps as opposed to continuous motion. This is supported by the observation that polymeric creep, recovery and stress relaxation can be correlated with stretched exponential functions, i.e. Weibull and Kohlrausch-Williams-Watts, since (i) the former is also used in reliability engineering to represent the failure of discrete elements and (ii) there is evidence of the latter being an approximation to the Eyring potential energy barrier relationship, which describes motion in terms of molecular jumps.
引用
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页码:4827 / 4831
页数:5
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