Abstract
The present work is an experimental investigation of the standard shear test ASTM C273 carried out on sandwich structures. The goal is to highlight and to quantify some parasitic effects that occur during this test. A suitable optical method providing whole-field measurements has been used to capture the displacement and strain fields during the test. Some parasitic effects have been detected: the steel plates bend during the test, the shear strain reaches zero near the free edges and compressive/tensile strains occur in this zone.
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References
ASTM C373, Method of Flexure Tests of Flat Sandwich Structures, American Society for Testing and Materials, Philadelphia (1999).
Lingaiah, K. andSuryanarayana, B.G., “Strength and Stiffness of Sandwich Beams in Bending,” EXPERIMENTAL MECHANICS,48 (1)1–7 (1991).
Frostig, Y., “On Stress Concentration in the Bending of Sandwich Beams with Transversely Flexible Core,”Composite Structures,24 (2),161–169 (1993).
Thomsen, O.T., “Theoretical and Experimental Investigation of Local Bending Effects in Sandwich Plates,”Composite Structures,30 (1),85–101 (1995).
Thomsen, O.T. andFrostig, Y., “Localized Bending Effects in Sandwich Panels: Photoelastic Investigation Versus High-order Sandwich Theory Results,”Composite Structures,37, (1)97–108 (1997).
Shuaeib, F.M. andSoden, P.D., “Indentation Failure of Composite Sandwich Beams,”Composite Science and Technology 57 (9)1249–1259 (1997).
Caprino, G. andLangella, A., “Study of a Three-point Bending Specimen for Shear Characterization of Sandwich Cores,”Journal of Composite Materials,34 (9),791–814 (2000).
ASTM C273, Shear Test in Flatwise Plane of Flat Sandwich Construction or Sandwich Cores, American Society for Testing and Materials, Philadelphia (2000).
BS4370 Part 2, British Standard Methods of Test for Rigid Cellular Materials, British Standard Institution, London (1973).
NFT54-605, “Structures Sandwiches à Base de Plastiques, Détermination de la Résistance au Cisaillement, Association Francaise de Normalisation, Paris (1983).
O'Connor, D.J., “An Evaluation of Test Methods for Shear Modulus of Sandwich Cores,”The International Journal of Cement Composites and Lightweight Concrete,6 (1)3–12 (1984).
Kelsey, S., Gellatly, R.A., andClark, B.W., “The Shear Modulus of Foil Honeycomb Cores,”Aircraft Engineering,30, (10),294–302 (1958).
O'Connor, D.J., “A Comparison of Test Methods for Shear Properties of the Cores of Sandwich Construction”Journal of Testing and Evaluation,17 (4),241–246 (1989).
Olsson, K.-A. and Lönnö, A., “Test Procedures for Foam Core Materials,” In Proceedings of the First International Conference on Sandwich Constructions, Stockholm, 19–21 June (1989).
Frostig, Y., Thomsen, O.T., andMortensen, F., “Analysis of Adhesive-bonded Joints, Square-end and Spew-fillet—High-order Theory Approach,”Journal of Engineering Mechanics, ASCI Engineering Mechanics Division,125 (11)1298–1307 (1999).
Goland, M. andReissner, E., “The Stresses in Cemented Joints,”Journal of Applied Mechanics, Transactions of the ASME,66,A17-A27 (1944).
Adams, R.D. andPeppiatt, N.A., “Stress Analysis of Adhesive-bonded Lap Joints,”Journal of Strain Analysis,9,185–196 (1974).
Adams, R.D. and Wake, W.C., Structural Adhesive Joints in Engineering. Elsevier Applied Science Publishers (1987).
Whitney, J.M., Stansbarger, D.L. andHowell, H.B., “Analysis of the Rail Shear Test. Application and Limitation,”Journal of Composite Materials,5 (1)24–34 (1971).
Post, D., Dai, F.L., Guo, Y., andIfju, P., “Interlaminar Shear Moduli of Cross-ply Laminates: An Experimental Analysis,”Journal of Composite Materials,23 (3)264–279 (1989).
Meyer-Piening, H.-R., “Stress Distribution in a Four-point or Three-point Bending Probe,” In Mechanics of Sandwich Structures, 105–112, Kluwer (1998).
ASTM D3039-76, Standard Test Method for Tensile Properties of Fiber-resin Composites, American Society for Testing and Materials, Philadelphia (2000).
Surrel, Y. “Moiré and Grid Methods: A Signal-processing Approach,”In Interferometry '94: Photomechanics, ed. J. Pryputniewicz and J. Stupnicki, Proc. Soc. Photo-Opt. Instrum. Eng.,2342,213–220 (1994).
Dufort, L., Grédiac, M., andSurrel, Y., “Experimental Evidence of the Cross Section Warping in Short Composite Beams Under Three Point Bending,”Composite Structures,51,37–47 (2001).
Surrel, Y., “Design of Algorithms for Phase Measurements by the Use of Phase Stepping,”Applied Optics,35 (1)51–60 (1996).
Surrel, Y., Fournier, N., Grédiac, M., andParis, P.-A., “Phase-stepped Deflectometry Applied to Shape Measurement of Bent Plates,” EXPERIMENTAL MECHANICS,39 (1),66–70 (1999).
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Grédiac, M., Dufort, L. Experimental evidence of parasitic effects in the shear test on sandwich beams. Experimental Mechanics 42, 186–193 (2002). https://doi.org/10.1007/BF02410882
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DOI: https://doi.org/10.1007/BF02410882