Modification and evaluation of a FRF-based model updating method for identification of viscoelastic constitutive models for a nonlinear polyurethane adhesive in a bonded joint

Abstract

In this study, a Frequency Response Function (FRF) -based model updating method, was modified for the purpose of the identification of viscoelastic constitutive models. in better correlation with experiments. Increasing the excitation level, the storage modulus of the adhesive decreases, whereas the loss modulus increases, especially at high frequencies.

Dynamics of Structures, Frames, and Plates with Viscoelastic Dampers or Layers: A Literature Review

“…In the context of the type of experimental tests, we can distinguish uniaxial tests [66], shear dynamic modulus tests [67], creep tests, stress relaxation tests [68,69], and beam bending tests [70]. All these tests can be dynamic [71] or pseudo-static, and they typically involve the measurement and acquisition of time histories of forces and displacements, which are then processed numerically [72].…”