Effect of beam orientation on the static behaviour of phenolic core sandwich composites with different shear span-to-depth ratios

Abstract This study thoroughly investigated the flexural behaviour of phenolic cored sandwich beams with glass fibre composite skins in the horizontal and vertical positions. The beams have a shear span-to-depth ratio (a/d) varying between 0.5 and 12, and tested under 4-point static bending. Their failure load are then predicted theoretically. The results showed that changing the beam orientation from horizontal to vertical changes the failure mode from brittle to progressive. The sandwich beam’s high bending stiffness can be efficiently utilised by placing them vertically. The a/d ratio played a major role on the load capacity and failure mode. In both orientations, the load capacity decreased with the increased of a/d. The beam failed in shear, a combined shear and bending, and bending for a/d ≤ 2, 2

[1]  Amir Fam,et al.  In-Plane Bending and Failure Mechanism of Sandwich Beams with GFRP Skins and Soft Polyurethane Foam Core , 2016 .

[2]  Amar Khennane,et al.  Performance of outside filament-wound hybrid FRP-concrete beams , 2011 .

[3]  A. Manalo.  Behaviour of fibre composite sandwich structures under short and asymmetrical beam shear tests , 2013 .

[4]  Thiru Aravinthan,et al.  Composite railway sleepers – recent developments, challenges and future prospects , 2015 .

[5]  Keith R. Bootle,et al.  Wood In Australia: Types, Properties And Uses , 2005 .

[6]  Michael P. F. Sutcliffe,et al.  Indentation failure analysis of sandwich beams , 2000 .

[7]  Thomas Keller.  Material-tailored use of FRP composites in bridge and building construction , 2007 .

[8]  N. Fleck,et al.  Collapse of truss core sandwich beams in 3-point bending , 2001 .

[9]  Thiru Aravinthan,et al.  Flexural behaviour of structural fibre composite sandwich beams in flatwise and edgewise positions , 2010 .

[10]  Thiru Aravinthan,et al.  Geometry effect on the behaviour of single and glue-laminated glass fibre reinforced polymer composite sandwich beams loaded in four-point bending , 2012 .

[11]  Brahim Benmokrane,et al.  State-of-the-art review on FRP sandwich systems for lightweight civil infrastructure , 2017 .

[12]  H. Hahn,et al.  Flexural behavior of sandwich beams fabricated by vacuum-assisted resin transfer molding , 2003 .

[13]  Thanasis Triantafillou,et al.  Composites: a new possibility for the shear strengthening of concrete, masonry and wood , 1998 .

[14]  Hiroshi Yoshihara,et al.  Shear strengths of wood measured by various short beam shear test methods , 2003, Wood Science and Technology.

[15]  S. Kalyanasundaram,et al.  The effect of core thickness on the flexural behaviour of aluminium foam sandwich structures , 2007 .

[16]  E. Morozov,et al.  Behaviour of PU-foam/glass-fibre composite sandwich panels under flexural static load , 2015 .

[17]  Amir Fam,et al.  Flexural performance of sandwich panels comprising polyurethane core and GFRP skins and ribs of various configurations , 2010 .

[18]  L. Bank.  Composites for Construction: Structural Design with FRP Materials , 2006 .

[19]  Bernardo Zuccarello,et al.  Experimental and numerical evaluation of the mechanical behaviour of GFRP sandwich panels , 2007 .

[20]  Thiru Aravinthan,et al.  Behavior of Full-Scale Railway Turnout Sleepers from Glue-Laminated Fiber Composite Sandwich Structures , 2012 .

[21]  Maria Kashtalyan,et al.  Three-dimensional elasticity solution for sandwich panels with a functionally graded core , 2009 .

[22]  R. R. Malagi,et al.  Effect of Span-to-depth Ratio on Flexural Properties of Wood Filled Steel Tubes☆ , 2014 .

[23]  Norman A. Fleck,et al.  Collapse mechanisms of sandwich beams with composite faces and a foam core, loaded in three-point bending. Part I: analytical models and minimum weight design , 2004 .

[24]  E. Morozov,et al.  Experimental, Theoretical and Numerical Investigation of the Flexural Behaviour of the Composite Sandwich Panels with PVC Foam Core , 2014, Applied Composite Materials.

[25]  Amir Fam,et al.  of precast concrete sandwich wall panels with basalt FRP and steel reinforcement , 2015 .

[26]  Francis L. Brannigan,et al.  Building construction for the fire service , 1982 .

[27]  Diana Sommer.  Mechanical Design Of Machine Elements And Machines A Failure Prevention Perspective , 2016 .

[28]  Jilin Yu,et al.  A plastic indentation model for sandwich beams with metallic foam cores , 2011 .

[29]  M. L. Plume,et al.  SPSS (Statistical Package for the Social Sciences) , 2002, Encyclopedia of Information Systems.

[30]  Raafat El-Hacha,et al.  Effect of casting method and shear span-to-depth ratio on the behaviour of Ultra-High Performance Concrete cross arms for high voltage transmission lines , 2010 .

[31]  Salim Belouettar,et al.  Experimental investigation of static and fatigue behaviour of composites honeycomb materials using four point bending tests , 2009 .

[32]  W. Karunasena,et al.  Behaviour of hollow pultruded GFRP square beams with different shear span-to-depth ratios , 2016 .

[33]  Michael D. Kotsovos,et al.  Size effects in beams with small shear span-to-depth ratios , 2004 .

[34]  David B. Dooner,et al.  Mechanical Design of Machine Elements and Machines: A Failure Prevention Perspective , 2002 .

[35]  Omar S. Es-Said,et al.  Theoretical design and analysis of a honeycomb panel sandwich structure loaded in pure bending , 2008 .

[36]  F. Lu,et al.  Local indentation of aluminum foam core sandwich beams at elevated temperatures , 2016 .