Vibroactive Pad Improvement Using Stack Type Piezoactuator

Previously created vibroactive pad encounters with a problem, i.e. vibrations are not fully descended, since amplitudes of vibroactive pad are lower. In microstructure replication process it causes insufficient flow of fluid, since it is directly dependent on the amplitude of excitation. As a solution for this problem stack type piezoactuator together with vibroactive pad of new construction are proposed. It is known, that stack type piezoactuators are able to reach higher amplitudes, than single piezoceramics can do, thus it is considered as a solution, in order to overcome previously mentioned problem. In this paper new construction of vibroactive pad is presented and numerically analyzed using Comsol Multiphysics 3.5a. software in order to determine its natural frequencies

Numerical investigation of dynamical properties of vibroactive pad during hot imprint process

The operating frequencies of the vibroactive pad used in order to improve the quality of replicas of complex microstructures during the mechanical hot imprint process, are numerically analyzed in this paper. It is known that piezoceramics (and in the same time all construction) change its dynamical properties under the action of mechanical load. It is necessary to investigate dynamical properties of vibroactive pad, in order to improve the quality of replicas when planning more detailed research and development in this field in the future. Experimentally there is no possibility to determine the frequency for the construction to be excited, in order to reach modes of forms, thus modeling of the process was performed. The created mathematical model of vibroactive pad was implemented by FEM using COMSOL Multiphysics software. The vibroactive pad’s numerical analysis was performed with and without the action of mechanical load, as well experimental verification of model was performed (for the validation of the model without load with experimental data)

Numerical Investigation of Dynamical Properties of Vibroactive Pad

The operating frequencies of the vibroactive pad used in order to improve the quality of replicas of complex microstructures during the mechanical hot imprint process, are numerically analyzed in this paper. It is known that piezoceramics changes its dynamical properties under the action of mechanical load. It is necessary to investigate dynamical properties of vibroactive pad, in order to improve the quality of replicas when planning more detailed research and development in this field in the future. Experimentally there is no possibility to determine the natural frequency for the construction to be excited, in order to reach the same modes of forms, thus modeling of the process was performed. The created mathematical model of vibroactive pad was implemented by FEM using COMSOL Multiphysics software