Influence of Curing Stresses on Extension-Twist Coupling in Laminated Composite Strips

Makeev, Andrew; Armanios, Erian A.; Hooke, David

doi:10.2514/2.577

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…Thus the analytical result derived in this work extends to the finite-displacement analysis of extension-twist coupled strips by Makeev et al [8].…”

Section: Remarksmentioning

confidence: 54%

“…Although the derived stability conditions were formulated in the context of CLT, they also provide a sufficient condition for hygrothermal twist stability in the geometrically non-linear model of extension-twist coupled laminated strips by Makeev et al [8]. In this work, a temperature-twist relationship for a laminated strip with extension-twist coupling was derived as…”

Section: Remarksmentioning

confidence: 99%

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Families of Hygrothermally Stable Asymmetric Laminated Composites

Cross

Haynes

Armanios

2008

Journal of Composite Materials

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Necessary and sufficient material-independent conditions are derived for hygrothermal stability of a laminated composite plate with plies made of the same specially orthotropic material based on classical lamination theory. The minimum number of plies required to obtain an asymmetric hygrothermally stable stacking sequence is proven to be five, and families of stable laminates are identified for six, seven, and eight plies. A sensitivity analysis demonstrates the robustness of hygrothermally stable solutions to small errors in ply orientation. A finite element analysis of geometric and ply orientation imperfections was performed to verify the robustness of the classical lamination theory results. Hygrothermally stable asymmetric laminate specimens were fabricated to confirm the analytical predictions.

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“…Thus the analytical result derived in this work extends to the finite-displacement analysis of extension-twist coupled strips by Makeev et al [8].…”

Section: Remarksmentioning

confidence: 54%

Section: Remarksmentioning

confidence: 99%

Families of Hygrothermally Stable Asymmetric Laminated Composites

Cross

Haynes

Armanios

2008

Journal of Composite Materials

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“…The temperature-twist relationship corresponding to Kirchoff's assumption of no transverse shear strain allows for an accurate prediction of the extension-twist relationship [1], and is given by…”

Section: Methodsmentioning

confidence: 99%

“…These effects have been accounted for in the geometrically nonlinear shell-type analysis developed in Ref. [1]. The present work aims at determining the stacking sequences that maximize the twisting response of laminated composites due to temperature change based on the formulation of Ref.…”

Section: Introductionmentioning

confidence: 99%

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

Ozbay¹,

Armanios²

2006

Advanced Composite Materials

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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.

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