Transient response of layered orthotropic strip to transverse load

0459552 - ÚT 2017 RIV CZ eng C - Conference Paper (international conference)
Adámek, V. - Valeš, František - Červ, Jan
Transient response of layered orthotropic strip to transverse load.
Engineering Mechanics 2016. Prague: Institute of Thermomechanics CAS, v. v. i., 2016 - (Zolotarev, I.; Radolf, V.), s. 22-25. ISBN 978-80-87012-59-8. ISSN 1805-8248.
[Engeneering Mechanics /22./. Svratka (CZ), 09.05.2016-12.05.2016]
R&D Projects: GA ČR(CZ) GAP101/12/2315
Institutional support: RVO:61388998
Keywords : wave propagation * layered strip * orthotropic material * viscoelastic material * analytical solution
Subject RIV: BI - Acoustics

This work concerns the transient response of an infinite two-layered strip subjected to a transverse load of impact character. The material of each layer is assumed to be specially orthotropic, i.e. the material and geometric axes coincide. Moreover, the material is modelled as linear viscoelastic using the model of standard linear viscoelastic solid such that the damping behaviour of the strip for long wavelengths and long times can be addressed. The non-stationary wave phenomena in the strip are studied using analytical approach. The system of equations of motion for the case of 2D plane-stress problem is solved using the classical method of integral transform. Once the formulas for the Laplace transforms of fundamental mechanical quantities are derived, the numerical inverse Laplace transform is used to obtain the response in time domain for a strip with free-fixed boundaries. The results for a strip composed of two orthotropic layers of specific material properties are presented in this work. Finally, this solution is confronted with the results of numerical simulations reached by a professional FE code.
Permanent Link: http://hdl.handle.net/11104/0261298