Compression/Shear Response of Honeycomb Core
Composite sandwich structures find applications in many aerospace systems due to their lightweight and high strength. However, these structures are susceptible to low energy impact damage. Our studies of the damage resistance and tolerance of honeycomb core sandwich structures shows that the performance of the core plays a key role. Thus we have undertaken a study of the compressive and shear behavior of the aluminum honeycomb cores used in several space systems. The study consists of uniaxial and compression/shear tests of the core. Using a novel ring specimen loaded in compression and torsion, we can load along any line in compression/shear stress space in order to map out the core’s yield surface and its evolution. Results from the experiments are used to validate computational models that are part of a larger simulation of the compression after impact strength of honeycomb core composites.
KeywordsImpact Strength Sandwich Panel Honeycomb Core Wall Waviness Ring Specimen
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- 2.2 Moody, C., Vizzini, A.J., “Damage Tolerance of Composite Sandwich Structures.” Final Report, Federal Aviation Administration Report, DOT/FAA/AR-99/91, 2000.Google Scholar
- 3.3 Minguet, P.J., “Model for predicting the behavior of impact-damaged minimum gauge sandwich panels under compression,” AIAA-91-1075-CP (1991).Google Scholar
- 5.5 Ratcliff, J.G, and Jackson, W.C., “A finite element analysis for predicting the residual compressive strength of impact-damaged sandwich panels,” NASA/TM 2008 215341 (2008).Google Scholar
- 6.6 Michael Czabaj, “Damage and damage tolerance of high temperature composites and sandwich composite structures,” Ph.D. thesis, Cornell University, (2010).Google Scholar