Interfacial Debonding of a Piezoelastic Bi-Material Structure Applicable for Wind Rotor Blades

Abstract

The main goal of the article is to model the straight line part of a wind blade by an analytical 1D shear lag model in order to analyze and detect possible interface delamination through the change of the voltage along the interface. A unit cell presented by a bi-material structure consisting of a first piezoelastic layer and an elastic second layer under static mechanical and electric load is considered. Numerical examples are provided and illustrated by figures and discussed. A criterion for detecting the interface elastic-brittle delamination and a safety zone for combined electrical and static loading is proposed.

Keywords:

• piezoelastic bi-material structure
• shear lag
• interfacial debonding
• safety zone
• detection criterion