System identification techniques for estimating material functions from wave propagation experiments
2002 (English)In: Inverse Problems in Engineering, Vol. 10, no 5, 413-439 p.Article in journal (Refereed) Published
Material properties of an elastic material are characterized by the elastic modulus, which is real-valued and constant. For viscoelastic materials, such as plastics and polymers, the relation between stress and strain is instead dynamic, and characterized by the complex-valued and frequency-dependent complex modulus. In this article it is described how system identification techniques can be used to determine the complex modulus using strain data from wave propagation experiments in a test specimen. Modeling, derivation of estimators, and analysis of their numerical and statistical properties are included. Several practical examples are presented using real-world data, and a number of extensions are outlined.
Place, publisher, year, edition, pages
2002. Vol. 10, no 5, 413-439 p.
IdentifiersURN: urn:nbn:se:uu:diva-44995OAI: oai:DiVA.org:uu-44995DiVA: diva2:72902