Simulation of the transient behavior of matter with characteristic geometrical variations & defects irradiated by nanosecond laser lulses using FEASimulation of the transient behavior of matter with characteristic geometrical variations & defects irradiated by nanosecond laser lulses using FEA Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-122015enThe thermomechanical transient response of matter illuminated by nanosecond laser pulses is modeled and simulated using the Finite Element Analysis (FEA). Matter’s behavior is numerically described by a three-dimensional (3D) multiphysics, coupled thermal structural, transient FEA, experimentally validated, model. FEA offers substantial insights into the materials’ micro-mechanical behaviour providing detailed information for the spatiotemporal evolution of acoustic waves. In this computational approach the impact of the geometric characteristics of the modeled metallic films to the generation and propagation of the ultrasonic waves, in relation to temperature, is investigated. The study is expanded to the dynamic reactions of matter in the presence of surface and solid volume defects and enclosures e.g.: gaps, holes or bubbles. The transient behavior of matter in the time and the space solution domains is obtained by the FEA model and presented.http://creativecommons.org/licenses/by/4.0/Key Engineering Materials665157-160 Stavroulakis Georgios Σταυρουλακης Γεωργιος Skarvelakis Emmanouil Σκαρβελακης Εμμανουηλ Kaselouris Evangelos Κασελουρης Ευαγγελος Nikolos Ioannis Νικολος Ιωαννης Y. Orphanos E. Bakarezos Papadogiannis, Nikolaos M. Tatarakis V. Dimitriou Rotary laser levels (Instruments) laser levels instruments rotary laser levels instruments