Shear Buckling of a Large Pultruded Composite I-Section under Asymmetric Loading
An experimental and analytical research on shear
buckling of a comparably large polymer composite I-section is
presented. It is known that shear buckling load of a large span
composite beam is difficult to determine experimentally. In order to
sensitively detect shear buckling of the tested I-section, twenty strain
rosettes and eight displacement sensors were applied and attached on
the web and flange surfaces. The tested specimen was a pultruded
composite beam made of vinylester resin, E-glass, carbon fibers and
micro-fillers. Various coupon tests were performed before the shear
buckling test to obtain fundamental material properties of the Isection.
An asymmetric four-point bending loading scheme was
utilized for the shear test. The loading scheme resulted in a high shear
and almost zero moment condition at the center of the web panel. The
shear buckling load was successfully determined after analyzing the
obtained test data from strain rosettes and displacement sensors. An
analytical approach was also performed to verify the experimental
results and to support the discussed experimental program.
[1] Barbero, E. J., and Raftoyiannis, I. 1993, "Local buckling of FRP beams
and columns.", ASCE J. Mater. Civil Eng. 5, pp. 339-355.
[2] Barbero, E. J., and Raftoyiannis, I. 1994, "Lateral and distortional
buckling of pultruded I-beams", Compos. Struct., 27, pp. 261-268.
[3] Mortram, J. T. 1992, "Lateral-torsional buckling of a pultruded I-beam",
Composites, 23, pp. 81-92.
[4] Bank, L.C., Nadipelli, M., and Gentry, T.R. 1994, "Local buckling and
failure of pultruded fiber-reinforced plastic beams", J. Appl. Mater.
Technol., 116, pp. 233-237.
[5] Roberts, T.M. 2002, "Influence of shear deformation on buckling of
pultruded fiber reinforced plastic Profiles:, J. Compos. Construct., 6, pp.
241-248.
[6] Shan, L., and Qiao, P., 2005, "Flexural torsional buckling of fiberreinforced
plastic composite open channel beams", Compos. Struct., 68,
pp. 211-224.
[7] Qiao, P., Davalos, J.F., and Wang, J., 2001 "Local buckling of
composite FRP shapes by discrete plate analysis." J. Struct. Eng., 127,
pp. 245-255.
[8] Bazant, Z., 2003, "Shear buckling of sandwich, fiber composite and
lattice columns, bearings, and helical springs: Paradox resolved", J.
Appl. Mech., 70, pp. 75-83.
[9] Karama, K.S., and Mistou, A.S., 2003, "Mechanical behavior of
laminated composite beam by the new multi-layered laminated
composite structures model with transverse shear stress continuity", Int.
J. Solid. Struct., 40, pp. 1525-1546.
[10] Singer, J., Arbocz, J., and Weller, T., 2008 Frontmatter. In Buckling
Experiments: Experimental Methods in Buckling of Thin-Walled
Structures: Shells, Built-Up Structures, Composites and Additional
Topics, John Wiley & Sons, Inc., Hoboken, NJ, USA, 2, pp. 1054-1155.
[11] Xu, R., and Wu, Y., 2002, "Static, dynamic and buckling analysis of
partial interaction composite members using Timoshenko's beam
theory", Int. J. Mech. Sci., 48, pp. 1139-1155.
[12] Ye, B.S., Svenson, A.L., and Bank, L.C., 2003, "Mass and volume
fraction properties of pultruded glass fiber-reinforced composites.
Composites, 26, pp. 725-731.
[13] 13. American Society for Testing and Materials (ASTM), 2011, ASTM
D 2584 Standard Test Method for Ignition Loss of Cured Reinforced
Resins; ASTM, Englewood, CO, USA.
[14] American Society for Testing and Materials (ASTM), 1999, ASTM D
3171 Standard Test Methods for Constituent Content of Composite
Materials; ASTM, Englewood, CO, USA.
[15] American Society for Testing and Materials (ASTM), 2008, ASTM D
3039, Standard Test Method for Tensile Properties of Polymer Matrix
Composite Materials, ASTM, Englewood, CO, USA.
[16] American Society for Testing and Materials (ASTM), 2007, ASTM D
3410, Standard Test Method for Compressive Properties of Polymer
Matrix Composite Materials with Unsupported Gage Section by Shear
Loading, ASTM, Englewood, CO, USA.
[17] American Society for Testing and Materials (ASTM), 2005, ASTM D
5379, Standard Test Method for Shear Properties of Composite
Materials by the V-Notched Beam Method, ASTM, Englewood, CO,
USA, 2005.
[18] Hoff, N. J., Boley, B. A. and Coan, J. M., 1948, "The Development of a
Technique for Testing Stiff Panels in Edgewise Compression", Proc. of
Society of Experimental Stress Analysis, 5, pp.14-24.
[1] Barbero, E. J., and Raftoyiannis, I. 1993, "Local buckling of FRP beams
and columns.", ASCE J. Mater. Civil Eng. 5, pp. 339-355.
[2] Barbero, E. J., and Raftoyiannis, I. 1994, "Lateral and distortional
buckling of pultruded I-beams", Compos. Struct., 27, pp. 261-268.
[3] Mortram, J. T. 1992, "Lateral-torsional buckling of a pultruded I-beam",
Composites, 23, pp. 81-92.
[4] Bank, L.C., Nadipelli, M., and Gentry, T.R. 1994, "Local buckling and
failure of pultruded fiber-reinforced plastic beams", J. Appl. Mater.
Technol., 116, pp. 233-237.
[5] Roberts, T.M. 2002, "Influence of shear deformation on buckling of
pultruded fiber reinforced plastic Profiles:, J. Compos. Construct., 6, pp.
241-248.
[6] Shan, L., and Qiao, P., 2005, "Flexural torsional buckling of fiberreinforced
plastic composite open channel beams", Compos. Struct., 68,
pp. 211-224.
[7] Qiao, P., Davalos, J.F., and Wang, J., 2001 "Local buckling of
composite FRP shapes by discrete plate analysis." J. Struct. Eng., 127,
pp. 245-255.
[8] Bazant, Z., 2003, "Shear buckling of sandwich, fiber composite and
lattice columns, bearings, and helical springs: Paradox resolved", J.
Appl. Mech., 70, pp. 75-83.
[9] Karama, K.S., and Mistou, A.S., 2003, "Mechanical behavior of
laminated composite beam by the new multi-layered laminated
composite structures model with transverse shear stress continuity", Int.
J. Solid. Struct., 40, pp. 1525-1546.
[10] Singer, J., Arbocz, J., and Weller, T., 2008 Frontmatter. In Buckling
Experiments: Experimental Methods in Buckling of Thin-Walled
Structures: Shells, Built-Up Structures, Composites and Additional
Topics, John Wiley & Sons, Inc., Hoboken, NJ, USA, 2, pp. 1054-1155.
[11] Xu, R., and Wu, Y., 2002, "Static, dynamic and buckling analysis of
partial interaction composite members using Timoshenko's beam
theory", Int. J. Mech. Sci., 48, pp. 1139-1155.
[12] Ye, B.S., Svenson, A.L., and Bank, L.C., 2003, "Mass and volume
fraction properties of pultruded glass fiber-reinforced composites.
Composites, 26, pp. 725-731.
[13] 13. American Society for Testing and Materials (ASTM), 2011, ASTM
D 2584 Standard Test Method for Ignition Loss of Cured Reinforced
Resins; ASTM, Englewood, CO, USA.
[14] American Society for Testing and Materials (ASTM), 1999, ASTM D
3171 Standard Test Methods for Constituent Content of Composite
Materials; ASTM, Englewood, CO, USA.
[15] American Society for Testing and Materials (ASTM), 2008, ASTM D
3039, Standard Test Method for Tensile Properties of Polymer Matrix
Composite Materials, ASTM, Englewood, CO, USA.
[16] American Society for Testing and Materials (ASTM), 2007, ASTM D
3410, Standard Test Method for Compressive Properties of Polymer
Matrix Composite Materials with Unsupported Gage Section by Shear
Loading, ASTM, Englewood, CO, USA.
[17] American Society for Testing and Materials (ASTM), 2005, ASTM D
5379, Standard Test Method for Shear Properties of Composite
Materials by the V-Notched Beam Method, ASTM, Englewood, CO,
USA, 2005.
[18] Hoff, N. J., Boley, B. A. and Coan, J. M., 1948, "The Development of a
Technique for Testing Stiff Panels in Edgewise Compression", Proc. of
Society of Experimental Stress Analysis, 5, pp.14-24.
@article{"International Journal of Architectural, Civil and Construction Sciences:69925", author = "Jin Y. Park and Jeong Wan Lee", title = "Shear Buckling of a Large Pultruded Composite I-Section under Asymmetric Loading", abstract = "An experimental and analytical research on shear
buckling of a comparably large polymer composite I-section is
presented. It is known that shear buckling load of a large span
composite beam is difficult to determine experimentally. In order to
sensitively detect shear buckling of the tested I-section, twenty strain
rosettes and eight displacement sensors were applied and attached on
the web and flange surfaces. The tested specimen was a pultruded
composite beam made of vinylester resin, E-glass, carbon fibers and
micro-fillers. Various coupon tests were performed before the shear
buckling test to obtain fundamental material properties of the Isection.
An asymmetric four-point bending loading scheme was
utilized for the shear test. The loading scheme resulted in a high shear
and almost zero moment condition at the center of the web panel. The
shear buckling load was successfully determined after analyzing the
obtained test data from strain rosettes and displacement sensors. An
analytical approach was also performed to verify the experimental
results and to support the discussed experimental program.", keywords = "Strain sensor, displacement sensor, shear buckling,
polymer composite I-section, asymmetric loading.", volume = "9", number = "5", pages = "592-4", }
