Abstract
The purpose of this paper is to compare the value of the shear modulus of an isotropic material (PMMA) obtained from both tensile and losipescu shear tests. A finite-element model is introduced to account for a nonuniform stress distribution in the losipescu coupon. A correction accounting for nonuniform strain values over the strain-gage section is also introduced. Rigorous statistical data processing leads to an estimation of the error between the moduli obtained by the two tests. Some points relevant to the losipescu test are reviewed, particularly concerning the sample preparation. Provided that a careful procedure is followed, excellent agreement is achieved between the shear moduli measured by the two methods.
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References
Iosipescu, N., “New Accurate Procedure for Single Shear Testing of Metals,”J. Mat.,2,537–566 (1967).
Walrath, D.E. andAdams, D.F., “The Iosipescu Shear Test as Applied to Composite Materials,”Experimental Mechanics,23,105–110 (1983).
Walrath, D.E. and Adams, D.F., “Analysis of the Stress State in an Iosipescu Shear Test Specimen,” Rep. No. UWME-DR-301-102-1, Dept. of Mech. Eng. Univ. of Wyoming (June 1983).
Walrath, D.E. and Adams, D.F., “Verification and Application of the Iosipescu Shear Test Method”, Rep. No. UWME-DR-401-103-1, Dept. of Mech. Eng. Univ. of Wyoming (June 1984).
Walrath, D.E. andAdams, D.F., “Further Development of the Iosipescu Shear Test Method,”Experimental Mechanics,27,113–119 (1987).
Walrath, D.E. andAdams, D.F., “Current Status of the Iosipescu Shear Test Method,”J. Comp. Mat.,21,494–507 (1987).
Pindera, M.-J., Choski, G., Hidde, J.S. andHerakovich, C.T., “A Methodology for Accurate Shear Characterization of Unidirectional Composites,”J. Comp. Mat.,21,1164–1185 (1987).
Morton, J., Ho, H., Tsai, M.Y. andFarley, G.L., “An Evaluation of the Iosipescu Specimen for Composite Materials Shear Property Measurement,”J. Comp. Mat.,26,708–750 (1992).
Abdallah, M.G. andGascoigne, H.E., “The Influence of Test Fixture Design of Iosipescu Shear Test for Fiber Composite Material,”Test Methods and Design Allowables for Fibrous Composites, ed. C.C. Chamis,2,ASTM STP 1003,231–260 (1989).
Swanson, S.R., Messick, M. andToombes, G.R., “Comparison of Torsion Tube and Iosipescu In-plane Shear Test Results for a Carbon Fiber Reinforced Epoxy Composite,”Comp.,16,220–224 (1985).
Sullivan, J.L., Kao, B.G. andVan Oene, H., “Shear Properties and a Stress Analysis Obtained from Vinyl-ester Iosipescu Specimens,”Experimental Mechanics,24,223–232 (1984).
Sternberg andKoiter, J. of Appl. Mech., ASME,25,575–581 (1958).
Ho, H., Tsai, M.Y., Morton, J. andFarley, G.L., “Numerical Analysis of the Iosipescu Specimen for Composite Materials,”Comp. Sci. and Tech.,46,115–128 (1993).
Pierron, F. andVautrin, A., “Accurate Evaluation of the Iosipescu In-plane Shear Test for Measuring the Shear Modulus of Laminated Composites,”Proc. ECCM CTS-2, 13–15 (Sept.1994).
Pierron, F., “New Iosipescu Fixture for the Measurement of the In-plane Shear Modulus of Laminated Composites: Design and Experimental Procedure,”Internal Rep. No. 940125, Ecole des Mines de Saint-Etienne, France (1994).
Chatfield, C., Statistics for Technology, 2nd Ed., Chapman and Hall, London (1978).
Pierron, F. andVautrin, A., “Accurate Comparative Determination of the In-plane Shear Modulus of T300/914 Using the Iosipescu and 45° Off-axis Tensile Tests,”Comp. Sci. and Tech.,52 (1),61–72 (1994).
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Pierron, F., Vautrin, A. & Harris, B. The losipescu in-plane shear test: Validation on an isotropic material. Experimental Mechanics 35, 130–136 (1995). https://doi.org/10.1007/BF02326470
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DOI: https://doi.org/10.1007/BF02326470