Acoustic and mechanical properties of viscoelastic, linear elastic and nonlinear elastic composites

• Akustische und mechanische Eigenschaften von viskoelastischen, linear-elastischen und nichtlinear-elastischen Verbundwerkstoffen

Topol, Heiko; Weichert, Dieter (Thesis advisor)

Aachen : Publikationsserver der RWTH Aachen University (2012)
Dissertation / PhD Thesis

Aachen, Techn. Hochsch., Diss., 2012

Abstract

This works deals with the analysis of the acoustic and mechanical properties of composite structures. For the investigation of the acoustic properties, linear elasticity, geometric, physical, and structural nonlinearity, and viscoelasticity are taken into account. Imperfect bonding between components is also considered. Different approximation techniques, such as the asymptotic expansion method and the plane-wave expansion method, are used to obtain the macroscopic acoustic properties of the structure and to determine the frequency bands (passing and stopping bands) of the composite. Stress distribution in the viscoelastic matrix of a fiber-reinforced composite after loading of the fibers is also investigated.