Affiliation:
1. Departamento de Engenharia Mecânica, Universidade Federal do Rio Grande do Norte, Natal, RN–Brazil
2. Composite Materials, Manufacture and Structures Laboratory, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523-1374, USA
Abstract
Understanding and designing for damping in composite laminates has become a topic of great interest; unfortunately, only limited viscoelastic property data is presently available. Direct experimental measurement of the three-dimensional viscoelastic properties is not simple to implement and, thus, an approach leading to the complete 3-D viscoelastic characterization using a reduced number of measured parameters is desirable. To address the difficulties related to direct measurement of properties, this work proposes a reduced number of material coefficients, which allow the specification of the viscoelastic constitutive relationships for a transversely isotropic material, based on only five independent dynamic stiffness parameters and three independent damping loss factors. Further, using this model, a method is developed, based on energy equations, which allows the viscoelastic properties to be evaluated from experimental data, collected from three bend-beam oscillatory tests and two measured Poisson’s ratios. The approach is validated through the use of both published data and an experimental investigation conducted using a Dynamic Mechanical Analyzer.
Subject
Materials Chemistry,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites
Cited by
39 articles.
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