Author(s)

C. E. Beldica, H. H. Hilton & R. Hinrichsen

Abstract

Viscoelastic beam damping and piezoelectric control of deformations, probabilistic failures and survival times -analytical and massively parallel computational simulations C.E. Beldica, H.H. Hilton & R.L. Hinrichsen Aeronautical and Astronautical Engineering Department (ME) and National Center for Supercomputing Applications (NCSA), University of Illinois at Urbana-Champaign (UIUC), USA. Abstract The effects of controlling viscoelastic beam creep deformations through applications of piezoelectric devices is investigated and solved by kite element methods. It is shown that delamination failure probabilities can be retarded and life times extended by the proper imposition of voltages. Computational performance evaluation studies for CPU times and speed ups are undertaken for distinct number of processors and evaluated. It is shown that the introduction of piezo devices and viscoelastic effects not only decrease temporal probabilities of failure, but also retard the structure's survival times. These results are also of importance in inverse problems, where voltages may be input to generate controlled displacements. Thus, such voltages, either generated and dissipated through resistors or input from external sources, can be used to control viscoelastic deformations, failure probability envelopes and survival times of composite and elevated temperature metal structural elements. It also shown that the use of LS-DYNA3Dtm significantly improves CPU times and speed ups compared to previous usage of ABAQUStm.

Keywords