Comparative Study On Dissipated Energy During Impact of Elastic and Viscoelastic Materials, Modeled By Finite Elements Method

N. FOCHEZATTO; FERNANDO BUEZAS; MARTA ROSALES; W. TUCKART

Mar del Plata

Workshop; 3º International Workshop of Tribology; 2015

Asociación Argentina de Tribologia

Impact between components can trigger, accelerate or, at least, influence damage to equipment due to fatigue, fracture or wear. Compound impact is characterized by the presence of sliding or rolling, which differentiate it from normal impact1. The measurement of variables during this kind of contact in experimental test is difficult due to the low contact times and vibrational effects, making it ideal for computational modeling. In the case of viscoelastic materials, which show a combination of a spring-like (elastic) and dashpot-like (viscous) behavior, it seems important to analyze the effects of these characteristics on impact response, since they may change the general response of the component.The objective of the present work is to determine, quantify and compare the mechanical response to impact of different viscoelastic materials, focusing on dissipated energy during the process. The system under study will be a disc of the material against a rigid semi-plane. The incorporation of static and dynamic friction in the equations makes the disc slip or roll over the rigid surfaces, depending on the evolution of the contact.