Constitutive parameter estimation of a viscoelastic model with internal variables

被引：25

作者：

Castello, D. A. ^{[1
]}

Rochinha, F. A. ^{[1
]}

Roitman, N. ^{[2
]}

Magluta, C. ^{[2
]}

机构：

[1] UFRJ, COPPE, POLI, Dept Mech Engn, BR-21945970 Rio De Janeiro, Brazil

[2] UFRJ, COPPE, Dept Civil Engn, BR-21945970 Rio De Janeiro, Brazil

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2008年 / 22卷 / 08期

关键词：

viscoelasticity; constitutive parameters; internal variables; parameter estimation;

D O I：

10.1016/j.ymssp.2008.02.007

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present work is aimed at estimating the constitutive parameters of viscoelastic materials. The constitutive equation addressed takes internal dissipation into account by means of internal variables. The identification method is built on an optimization problem where the minimum of an error function is sought. The error function is based on the difference between the experimental response and the model one and on the parameter constraints as well. The constitutive parameters are estimated by means of a modified Levenberg-Marquardt algorithm. The viscoelastic material characterization was assessed through an experimental set-up consisted of a sandwich beam with a viscoelastic core. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1840 / 1857

页数：18

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