Investigation of Flexural Creep of Kraft Paper Honeycomb Core Sandwich Panels Using the Finite Element Method


  • Zheng Chen
  • Ning Yan
  • Greg Smith
  • James Deng


Finite element model, primary creep, honeycomb, sandwich


Finite element (FE) models for the flexural creep of the sandwich panels with various Kraft paper honeycomb cores and wood composite skins were established. The creep constants of these FE models' core and skin were determined by simulating the experimental results of the flexural creep of the corresponding skin layer and sandwich panels individually. The influence of the core orientation, core shape, core and skin thickness, and core cell size was studied using these established FE models. The results indicated that the panel's flexural creep in the primary stage was smaller when the panel was thinner, longer, and wider as well as when the shelling ratio (thickness ratio between panel's core layer and skin layer) was smaller. The panel that had a higher stiffness skin layer, or the core's ribbon direction was parallel to the panel span, or was loaded at a lower level had a smaller flexural creep. However, there was no observed influence of honeycomb core's cell size on the flexural creep behavior of the sandwich panels.


ASTM (2005) C480-99. Standard test methods for flexural creep of sandwich construction. American Society for Testing and Materials, West Conshohocken, PA.nAndrews EW, Huang JS, Gibson LJ (1999) Creep behavior of a closed-cell aluminum foam. Acta Mater 47(10):2927-2935.nBitzer T (1997) Honeycomb technology: Materials, design, manufacturing applications and testing. Chapman & Hall, London, UK.nBodig J, Jayne B (1982) Mechanics of wood and wood composites. Van Nostrand Reinhold Company Inc., New York, NY.nChen Z, Yan N (2012) Investigation of elastic moduli of Kraft paper honeycomb core sandwich panels. Compos Part B-Eng 43(5):2107-2114.nChen Z, Yan Y, Smith G, Deng J (2011a) Flexural creep of the sandwich panel with Kraft paper honeycomb core and wood composite skin. Mater Sci Eng A 528(16-17):5621-5626.nChen Z, Yan Y, Smith G and Deng J (2011b) Parameters influence on the stiffness of Kraft honeycomb core sandwich core panel with wood composite skins. Submitted to Journal of Sandwich Structures and Materials.nCOSMOSWork (2008a) COSMOSWork 2008 Advanced Professional. SP2.1 (2008). SolidWorks Corporation, Concord, MA.nCOSMOSWork (2008b) COSMOSWork 2008 online user's guide. SolidWorks Corporation, Concord, MA.nGoretta KC, Brezny R, Dam CQ, Green DJ, DeArellano-Lopez AR, Dominguez-Rodriguez A (1990) High temperature mechanical behavior of porous open-cell. Mater Sci Eng A 124:151-158.nHolzer SM, Loferski JR, Dillard DA (1989) A review of creep in wood: Concepts relevant to develop long-term behavior predictions for wood structures. Wood Fiber Sci 21(4):376-392.nHuang JS, Gibson LJ (1991) Creep of polymer foams. J Mater Sci 26:637-647.nKrause H (1980) Creep analysis. Wiley, New York, NY.nLin JY, Huang JS (2005) Creep of hexagonal honeycombs with Plateau borders. Compos Struct 67:477-484.nOruganti RK, Ghosh AK (2002) Fabrication and creep studies on open cell nickel structures. Pages 211-221 in 3rd Global Symposium on Materials Processing and Manufacturing. Seattle, WA, February 17-21, Processing and properties of lightweight cellular metals and structures.nOruganti RK, Ghosh AK (2008) FEM analysis of transverse creep in honeycomb structures. Acta Mater 56:726-735.nSchniewind AP (1968) Recent progress in the study of the rheology of wood. Wood Sci Technol 2:199-206.nTabuchi M, Kubo K, Yagi K (1997) Effect of specimen thickness of creep crack growth properties of 1 Cr-Mo-V steel. Zairyo 46(1):53-57.nTaylor SB (1996) The flexural creep behavior of structural insulated panel (SIP) sandwich beam. PhD thesis, The Pennsylvania State University, University Park, PA.nTaylor SB, Manbeck HB, Janowiak JJ, Hiltunen DR (1997) Modeling structural insulated panel (SIP) flexural creep deflection. J Struct Eng 123(12):1658-1665.nXiang H, Fu YM, Huang SQ (2008) Creep-buckling of general hexagonal honeycombs under biaxial compression. Pages 900-904 in Advances in Heterogeneous Mechanics, International Conference on Heterogeneous Material Mechanics, Huangshan, China, June 3-8.n






Research Contributions