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Experimental Validation of the Transverse Shear Behavior of a Nomex Core for Sandwich Panels

This work deals with determination of the transverse shear moduli of a Nomex® honeycomb core of sandwich panels. Their out-of-plane shear characteristics depend on the transverse shear moduli of the honeycomb core. These moduli were determined experimentally, numerically, and analytically. Numerical simulations were performed by using a unit cell model and three analytical approaches. Analytical calculations showed that two of the approaches provided reasonable predictions for the transverse shear modulus as compared with experimental results. However, the approach based upon the classical lamination theory showed large deviations from experimental data. Numerical simulations also showed a trend similar to that resulting from the analytical models.

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References

  1. 1.

    S. D. Pan, L. Z. Wu, Y. G. Sun, Z. G. Zhou, J. L. Qu, “Longitudinal shear strength and failure process of honeycomb cores,” Composite Structures 72, 42-46 (2006).

    Article  Google Scholar 

  2. 2.

    C. W. Schwingshackl, G. S. Aglietti, and P. R. Cunningham, “Determination of honeycomb material properties: Existing theories and an alternative dynamic approach,” J. of Aerospace Engineering, 177-183 (2006).

  3. 3.

    S. Balawi and J. L. Abot, “A refined model for the effective in-plane elastic moduli of hexagonal honeycombs,” Compos. Struct., 84, 147-158 (2008).

    Article  Google Scholar 

  4. 4.

    T. Nordstrand and A. C. Leif, “Evaluation of transverse shear stiffness of structural core sandwich plates,” Compos. Struct., 37, 145-153 (1997).

    Article  Google Scholar 

  5. 5.

    A. Abbadi, Y. Koutsawa, A. Carmasol, S. Belouettar, and Z. Azari, “Experimental and numerical characterization of honeycomb sandwich composite panels,” Simulation Modeling Practice and Theory, 17, 1533-1547 (2009).

    Article  Google Scholar 

  6. 6.

    F. Meraghni, F. Desrumaux, and M. L. Benzeggagh, “Mechanical behavior of cellular core for structural sandwich panels,” Composites: Part A, 30, 767-779 (1999).

    Article  Google Scholar 

  7. 7.

    L. J. Gibson and M. F. Ashby, “Cellular Solid Structure and Properties,” Pergman Press England (1988).

  8. 8.

    S. Kelsey, R. A. Gellaty, and B. W. Clark, “The shear modulus of foil honeycomb core,” Aircraft Engn, 294-302 (1958).

  9. 9.

    C. C. Foo, G. B. Chai, and L. K. Seah, “Mechanical properties of Nomex® material and Nomex® honeycomb structure,” Compos. Struct., 80, 588-594 (2007).

    Article  Google Scholar 

  10. 10.

    H. Xie, W. Li, J. Zhao, and J. Tian, ”Study on the out of plane shear properties of superalloy honeycomb core,” 18th Int. Conf. on Composite Materials.

  11. 11.

    D. Reyes, E. R. Ledesma, V. J. Colin, and V. A. Alcantar, “Modal analysis of a composite type sandwich with FEM,” Memories of VII Annual Int. Congress SOMIM, Mexico (2011).

  12. 12.

    D. Mirko, R. Bosko, K. Branimir, and B. Aleksander, “3D random fiber composites as a repair material for damaged honeycomb cores,” FME Transactions, 41, 325-332 (2013).

    Google Scholar 

  13. 13.

    M. A. Nasir, Z. Khan, I. Farooqi, S. Nauman, S. Anas, S. Khalil, A. Pasha, Z. Khan, M. Shah, H. Qaiser, and R. Ata, “Transverse shear behavior of Nomex core for sandwich panels,” Mech. Compos. Mater., 50, No. 6, 733-738 (2015).

    Article  Google Scholar 

  14. 14.

    T. Nordstrand, A. C. Leif, and G.A. Howard, “Transverse shear stiffness of structural core sandwich,” Compos. Struct., 27, 317-329 (1994).

    Article  Google Scholar 

  15. 15.

    A. L. Kalamkarov, “On the determination of effective characteristics of cellular plates and shells of periodic structure,” Mechanics of Solids, 22, No. 2, 175-179 (1987).

    Google Scholar 

  16. 16.

    American Society for Testing and Materials C-273: Standard Test Method for Shear Properties of Sandwich Core Materials.

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Correspondence to M. A. Nasir.

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Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 53, No. 2, pp. 279-290 , March-April, 2017.

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Farooqi, M.I., Nasir, M.A., Ali, H.M. et al. Experimental Validation of the Transverse Shear Behavior of a Nomex Core for Sandwich Panels. Mech Compos Mater 53, 193–202 (2017). https://doi.org/10.1007/s11029-017-9653-0

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Keywords

  • Nomex honeycomb
  • transverse shear moduli
  • finite-element analysis