Abstract
This paper deals with dynamic transient responses of a viscoelastic structure in an automotive wiper blade. Restoring force of the viscoelastic structure includes buckling phenomena and nonlinear time lag between load and deformation. We found that large differences appear in the restoring force between a path under increasing load condition and a path under decreasing load condition. The restoring force is measured using Levitation Mass Method(LMM) proposed by Fujii. In this paper, we carry out numerical analysis of dynamic response for the structure under the same conditions with the experiment. The viscoelastic structure is modeled using nonlinear concentrated springs with nonlinear hysteresis. This nonlinear spring is connected to the levitated block, which is modeled by three-dimensional finite elements. The experimental data are compared with the calculated ones using our proposed FEM.
