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COMPOSITES
SCIENCE AND
TECHNOLOGY
Composites Science and Technology 68 (2008) 727–733
pscitech
2D damping predictions of posite plates: Layup effects
. Billups, . Cavalli *
University of North Dakota, Department of Mechanical Engineering, Stop 8359, 243 Centennial Drive, Grand Forks, ND 58202-8359, United States
Received 29 November 2006; received in revised form 25 May 2007; accepted 12 September 2007
Available online 20 September 2007
Abstract
Several two-dimensional theories for predicting the specific damping capacity (SDC) of posite laminates pared. The
theories considered are those of Adams and Bacon, Adams and Maheri, Ni and Adams and Saravanos and Chamis. No interlaminar
effects are considered. Results show that the theory of Saravanos and Chamis provides the most consistent fit to experimental results
for a range of material properties and laminate layups. For some laminates, however, the Saravanos and Chamis method seems to pre-
dict the wrong trend in SDC variation versus layup angle. It is not clear from the current work whether this result is due to the absence of
interlaminar effects in the theory or the presence of a three-dimensional stress state in the laminate.
Ó 2007 Elsevier Ltd. All rights reserved.
Keywords: A. Polymer–posites; A. Structural materials; B. Modeling; C. Laminate theory
1. Introduction Mahe