Composite Box Beam Analysis: Theory and Experiments

Author:

Bauchau O.A.1,Coffenberry B.S.2,Rehfield L.W.3

Affiliation:

1. Rensselaer Polytechnic Institute Department of Mechanical Engineering Aeronautical Engineering and Mechanics Troy, New York 12180

2. Material Sciences Corporation Spring House, Pennsylvania 19477

3. Georgia Institute of Technology School of Aerospace Engineering Atlanta, Georgia 30332

Abstract

Beam theory is widely used as a first approximation in numerous structural applica tions. When applied to composite beams, the accuracy of beam theory becomes ques tionable because (1) the shearing and warping deformations become significant, as the shearing stiffness of composite laminates is often very low, and (2) several elastic couplings can occur that strongly influence the behavior of composite beams. The tor sional behavior of thin-walled composite beams has important implications for aeronautical structures and is deeply modified by the above non-classical effects. This paper presents two comprehensive analysis methodologies for composite beams and describes experimental results obtained from a thin-walled, rectangular cross-sectional beam. The theoretical predictions are found in good agreement with the observed twist and strain distributions. Out-of-plane torsional warping of the cross-section is found to be the key factor for an accurate modeling of the torsional behavior of such structures.

Publisher

SAGE Publications

Subject

Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

Reference4 articles.

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