Abstract
AbstractHybrid laminates containing an elastomer layer in addition to fiber reinforced polymer as well as metal layers have been found beneficial in compensating issues frequently found with traditional fiber metal laminates. Commonly used equivalent single‐layer shell and plate theories, however, are unable to account for the strong heterogeneous stiffness distribution of the constituents within the laminate. Furthermore, the transverse shear and normal deformations in the elastomer layer are expected to significantly influence the deformation of the neighboring laminae. An accurate depiction of these transverse stresses requires a multi‐layer shell theory as opposed to commonly used single‐layer formulations. Hence, a higher order mixed variational plate theory is applied in order to study and predict the mechanical behavior of such laminates, especially on a structural level where the computational effort forbids the use of a three dimensional continuum formulation.
Highlights
As a result of their high stiffness and low mass while exhibiting a small thickness, hybrid laminates consisting of carbon fiber-reinforced polymer (CFRP) and metal layers are often prone to vibrations
The Generalized Unified Formulation (GUF) by Demasi [4, 5] is applied to hybrid CFRP elastomer metal laminates (HyCEMLs) in this work in order to evaluate its suitability for coping with these strongly heterogeneous laminates in terms of stiffness
The GUF is applied to a HyCEML in order to test its suitability for predicting the displacements and out-ofplane stresses over the thickness of this strongly heterogeneous laminate
Summary
As a result of their high stiffness and low mass while exhibiting a small thickness, hybrid laminates consisting of carbon fiber-reinforced polymer (CFRP) and metal layers are often prone to vibrations. The introduction of a highly viscoelastic layer in the interface can significantly damp these vibrations by means of constrained layer damping. The application of this mechanism to hybrid CFRP elastomer metal laminates (HyCEMLs) has previously been investigated by Liebig et al [1] and Sessner et al [2, 3]. In order to accurately depict the damping behavior of more complex structures on component level, quantitative knowledge of the stress and strain states in the elastomeric damping layer is necessary. While a full three dimensional Finite Element Method (FEM) model would be computationally too expensive, commonly used shell and plate theories are usually unable to accurately predict the out-of-plane stresses in each layer. The Generalized Unified Formulation (GUF) by Demasi [4, 5] is applied to HyCEML in this work in order to evaluate its suitability for coping with these strongly heterogeneous laminates in terms of stiffness
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
