Optimum stacking sequences for extension–twist coupled composites subject to thermal stresses

Abstract

Optimum stacking sequences for extension-twist coupled composites under thermal stresses are determined. An optimization technique is utilized to determine the optimum stacking sequences. An alternative method is developed based on the identification of a parameter controlling the optimum stacking sequence. Comparison of associated extension-twist coupling values demonstrates their accuracy. It is observed that as the number of plies increases, the optimum stacking sequence follows an asymptotic behavior and that an angle ply system does not represent an optimum stacking sequence. The results are validated through manufacturing of candidate laminates.

Optimum Design of Composite Structures: A Literature Survey (1969–2009)

“…514,982 As in most of the studies, the laminate may be required to be symmetric to avoid bending-extension coupling. In some of the studies, 49,50,61,84,91,132,137,138,141,153,165,181,182,193,215,216,224,297,352,450,500,584,614,654,657,711,784,805,806,811,821,826,849,882,1005 unsymmetrical laminates were considered. In many of the studies, laminates are prescribed to be balanced to prevent shear–extension coupling.…”