Qualitative analysis of a 3D multiphysics model for nonlinear ultrasonics and vibration induced heating at closed defects

Upon exciting a material using elastic waves, the locally induced deformation at interfaces of internally closed defects may cause nonlinear wave mechanics and dynamics in form clapping friction. As result, both phenomena instigate spectral broadening excitation spectrum as well production heat, directly originating from defect. To better understand account for physics behind dissipation energy by result wave–interface interaction, dedicated models can be developed. In this work, we propose 3D finite element multiphysics model that is capable simultaneously describing generation nonlinearities heating defect’s interface experiencing friction propagation. The consists three different modules. first module describes propagation virgin/bulk material, whereas second captures contact defect level. third implemented to calculate diffusion thermal specimen. accounts anharmonic hysteretic effects, behavior interfaces, which echoed ultrasound vibration-induced heating. A qualitative analysis computational model, integrating modules, performed validate approach. Examples show components are indeed observed experienced faces At same time, localized temperature increase due noted, its response outer surface sample examined. validation approves ready tested further quantitively, compare predictions experiments.