Comparison between a linear and cubic fiber angle variation on buckling response of variable angle tow composite panels

Lemos, Diego Magela; Cimini, Carlos Alberto

doi:10.1590/1679-78256464

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…2 Gürdal et al 3 proposed a linear-varying definition method to obtain the curved paths of fiber tows and confirmed that VS layup configuration could improve in-plane mechanical properties of composite laminates compared to conventional composite laminates. With Gürdal's VS layup design method, Afshin 4 and Lemos 5 investigated the influences of layup configuration on the buckling and postbuckling behaviors of VS laminates. Based on cubic NURBS curves, Rouhi et al 6 designed and manufactured a VS cylinder, and their experiment results showed that the buckling resistance of the VS cylinder was about 18.5% higher than that of the CS one.…”

Section: Introductionmentioning

confidence: 99%

Influence of variable‐stiffness layup configuration on curing deformation of curved‐surface structures

Niu

Yao

2022

J of Applied Polymer Sci

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Accurate prediction the curing‐induced deformation is the key to the fabrication of high‐quality composite structures. Aiming at controlling shape distortion of curved‐surface parts during curing process, a layup optimization strategy is proposed based on a variable stiffness (VS) placement method, which uses geodesic curves as fiber‐tow paths. Taking an offset parabolic antenna reflector (PAR) for example, chemical shrinkage and thermal deformation of curved‐surface composites during the curing process and after demolding are modeled. By combining Fourier heat conduction theory, curing kinetics, and generalized Maxwell viscoelastic model, the interactions between chemical cross‐link reaction, heat transfer, and mechanical deformation are taken into account. By comparing the deformation characteristics of VS and traditional constant stiffness structures, the proposed simulation strategy of curing process for composites can predict the factors that influence the curing deformation of VS structures are analyzed. The results show that the maximum of VS PAR decreases by 11.02%, and the average magnitude decreases by 32.35%.

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