Inadequate experimental characterization of strength and deformation behavior of unidirectional fiber composites under planar biaxial stresses has hindered the development of complete material models. Here the recent development of a cruciform specimen with unidirectional gage section is presented, suitable to test glass/epoxy under combined high transverse and longitudinal tensile loads.
The experimental program developed comprises of six different biaxial tensile load ratios. The results show significant influence of longitudinal stress on transverse nonlinearity of a glass/epoxy. Failure loci and failure modes in biaxial tensile strain and stress domains are presented, indicating a reduction of transverse strength by high longitudinal loads.
Daniel, I.M. and Ishai, O. (1994). Engineering Mechanics of Composite Materials, Oxford University Press, New York, Oxford.
2.
Tsai, S.W. and Wu, E.M. (1971). A General Theory of Strength for Anisotropic Materials , Journal of Composite Materials, 5: 58-81.
3.
Hashin, Z. (1980). Failure Criteria for Unidirectional Fiber Composites , ASME Journal of Applied Mechanics, 47: 329-334.
4.
Puck, A. and Schurmann, H. (1998). Failure Analysis of FRP Laminates by Means of Physically Based Phenomenological Models, Composites Science and Technology, 58(7): 1045-1067.
5.
Thom, H. (1997). A Review of the Biaxial Strength of Fibre-reinforced Plastics, Composites Part A, 29A: 869-886.
6.
Chen, A.S. and Matthews, F.L. (1993). A Review of Multiaxial/Biaxial Loading Tests for Composite Materials, Composites, 27(4): 395-406.
7.
Swanson, S.R. (1998). Overview of Biaxial Test Results for Carbon Fiber Composites, Composite Materials: Fatigue and Fracture, Seventh Volume ASTM STP 1330, American Society for Testing and Materials, pp. 19-33.
8.
Cuntze, R., Deska, R., Szelinski, B., Jeltsch-Fricker, R., Meckbach, S., Huybrechts, D., Kopp, J., Kroll, L., Gollwitzer, S. and Rackwitz, R. (1997). Neue Bruchkriterien und Festigkeitsnachweise für Unidirektionalen Faserverbundkunststoff unter Mehrachsiger Beanspruchung - Modellbildung und Experimente, VDI Verlag, Dusseldorf.
9.
Escanero, S. (2002). Continuum Damage Mechanic Experiment and Analysis of Steel-Strip/ Glass-Fiber Composite Laminate Cylindrical Shells with Thermal Residual Stresses, Thesis, Department of Mechanical Engineering, University of Houston, Houston, Texas.
10.
Ladeveze, P. and Le Dantec, E. (1992). Damage Modeling of the Elementary Ply for Laminated Composites, Composites Science and Technology, 43: 257-267.
11.
Soden, P.D., Kaddour, A.S. and Hinton, M.J. (eds) (2004). Failure Criteria in Fibre Reinforced Polymer Composites Part C: Additional Theories Conclusions and Recommendations, Composite Science and Technology, 64(3-4): 319-604.
12.
Soden, P.D., Kaddour, A.S. and Hinton, M.J. (2004). Recommendations for Designers and Researchers Resulting from the World-wide Failure Exercise, Composite Science and Technology, 64: 589-604.
13.
Youssef, Y., Labonte, S. and Lefebvre, D. (1998). Specimen Design, Manufacturing and Testing Procedures for Flat Carbon Fiber Reinforced Plastic Laminates Under Biaxial Loading, Polymer Composites, 19(3): 257-263.
14.
Welsh, J.S. and Adams, D.F. (2002). An Experimental Investigation of the Biaxial Strength of IM6/3501-6 Carbon/Epoxy Cross-ply Laminates Using Cruciform Specimen, Composites Part A, 33A: 829-839.
15.
Smits, A., Van Hemelrijck, D., Philippidis, T.P. and Cardon, A. (2006). Design of a Cruciform Specimen for Biaxial Testing of Fibre Reinforced Composite Material, Composites Science and Technology, 66: 964-975.
16.
Masumoto, H. and Tanaka, M. (1990). In: Lohr, E.D. (ed.), Ultra High Temperature In-plane Biaxial Fatigue Testing System with in situ Observation, Ultra High Temperature Mechanical Testing, pp. 193-207, Woodhead Publishing, England.
17.
de Jong, G.J. (1991). A Solution for the Problem of Load Introduction in Biaxial Fatigue Tests, Strain, 27: 137-42.
18.
Hoa, S.V. (1995). Biaxial Bearing/Bypass Testing of Graphite/Epoxy Plates, Journal of Composite Technology & Research, 17(2): 125-133.
19.
Fawaz, Z. and Neale, K.W. (1995). A Cruciform Specimen for the Evaluation of Properties of Advanced Composites, Transactions of the CSME, 19(1): 25-36.
20.
Mase, G.T. (1991). Biaxial Characterization of Carbon/Epoxy Unidirectional and QuasiIsotropic composites, Journal of Energy Resources Technology, Transactions of the ASME, 113(3): 189-192.
21.
Cole, B. and Pipes, R.B. (1974). Filamentary Composite Laminates Subjected to Biaxial Stress Fields, AFFDL-TR-73-115.
22.
Al-Khalil, M.F.S., Soden, P.D., Kitching , R. and Hinton, M.J. (1993). The Effects of Radial Stresses on the Strength of Thin-walled Filament Wound GRP Composite Pressure Cylinders, International Journal of Mechanical Sciences, 38(1): 97-120.
23.
Hutter, U., Schelling, H. and Krauss, H. (1975). An Experimental Study to Determine Failure Envelope of Composite Materials with Tubular Specimens Under Combined Loads and Comparison Between Several Classical Criteria, Failure Modes of Composite Materials with Organic Matrices and Their Consequences on Design, NATO, AGARD-CP-163, pp. 3-1 to 3-11.
24.
Toombes, G. , Swanson, S. and Cairns, D. (1985). Biaxial Testing of Composite Tubes, Experimental Mechanics , 25: 186-192.
25.
Monch, E. and Galster, D. (1963). A Method for Producing a Defined Uniform Biaxial Tensile Stress Field, British Journal of Applied Physics, 14: 810-812.
26.
Adams, D.F., Carlsson, L.A. and Pipes, R.B. (2003). Lamina Tensile Response, Experimental Characterization of Advanced Composite Materials, 3rd edn, p. 78, CRC Press , Boca Raton.
27.
Hahn, H.T. and Tsai, S.W. (1972). Nonlinear Elastic Behavior of Unidirectional Composite Laminae, Journal of Composite Materials, 7: 102-118.
28.
Hashin, Z., Bagchi, D. and Rosen, B.W. (1974). Non-Linear Behavior of Fiber Composite Materials , NASA CR-2313.
29.
Pindeira, M.J. and Herakovich, C.T. (1982). In: Sih, G.C. and Tamusz, V.P. (eds), Influence of Stress Interaction on the Behavior of Off-Axis Unidirectional Composites, Fracture of Composite Materials, Martinus Nijhoff , pp. 185-196.
Sultan, J.N. and McGarry, F.J. (1973). Effect of Rubber Particle Size on Deformation Mechanisms in Glassy Epoxy, Polymer Engineering and Science, 13: 29-34.
32.
Kody, R.S. and Lesser, A.J. (1997). Deformation and Yield of Epoxy Networks in Constrained States of Stress, Journal of Materials Science, 32: 5637-5643.
33.
Kawabata, S., Houseki, Y., Imai, S. and Nishiyama, T. (1976). Failure of Polymers under multi-axial Stress Field , In: Proc. of the 2nd international Conference on Mechanical Behavior of Material, pp. 105-109, ASM, Materials Park, Ohio.
34.
Asp, L.E. , Berglund, L.A. and Talreja, R. (1996). A Criterion for Crack Initiation in Glasy Polymers Subjected to a Composite-Like Stress State, Composites Science & Technology, 56: 1291-1301.
35.
Cytec Engineered Materials Inc. (2001). Cycom 5216 Modified Epoxy Resin Technical data sheet, www.cytec.com
36.
ASTM international (2003). ASTM D3171-99, Annual Book of ASTM Standards 2003, Vol. 15.03, American Society for Testing and Materials, Philadelphia.
37.
3M (1992). Scotchply, SP114 technical data sheet.
38.
ASTM international (2003). ASTM D 3039/D 3039 M-00, Annual Book of ASTM Standards 2003, Vol. 15.03, American Society for Testing and Materials, Philadelphia.
39.
Wang, S. and Dasgupta, A. (1986). Development of Iosipescu-type test for Determining In-plane Shear Properties of Fiber Composite Materials: Critical Analysis and Experiment. UILU-ENG-86-5021, University of Illinois at Urbana.
40.
Tuttle, M.E. (1998). In: Lilburn, G.A. and Jenkins, C.H. (eds), Fundamental strain-gage Technology, Manual on Experimental Methods for Mechanical Testing of Composites, 2nd edn, Fairmont Press.
