The Effect of Importing Extension-Bending Coupling into Asymmetric Composite Structures

The application of asymmetric composite materials in such adaptive structures as fan blades, fixed-wing aircrafts, and tilting rotors can lead to more deformation modes and good mechanical properties still remaining hygrothermally stable. But the influence of the extension-bending coupling effect on their mechanical properties is unknown. The wing skin is taken as an example to obtain a variety of hygro-thermally stable laminates with the extension-bending coupling effect by the optimal design method. It is compared with laminates with no extension-bending coupling effect by theoretical calculations and simulation verifications. The merits and demerits of the extension-bending coupling effect on other coupling effects, yield strength and buckling load of asymmetric composite structures have been clarified.

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Acknowledgement

The authors gratefully acknowledge the support of the National Natural Science Foundation of China (Grant No. 11,472,003).

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Correspondence to D. Li.

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Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 56, No. 6, pp. 1127-1140, November-December, 2020.

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Cui, D., Li, D. The Effect of Importing Extension-Bending Coupling into Asymmetric Composite Structures. Mech Compos Mater 56, 779–788 (2021). https://doi.org/10.1007/s11029-021-09923-8

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Keywords

  • laminates
  • extension-bending coupling
  • optimal design
  • hygrothermal stability
  • mechanical properties