Sage Journals: Discover world-class research

Abstract

The v-notch (Iosipescu) shear test was investigated as a mean for determining the in-plane shear modulus and strength of unidirectional hybrid composites. Two types of hybrid systems having different fiber tow volume fractions composed of carbon and glass fiber tows with epoxy matrix were used for this study. A fiber tow-based finite element analysis was also used to simulate the v-notch shear test for characterizing stress–strain distributions of the specimen. Our experimental and numerical evaluation shows that although the local inhomogeneity inherent in the hybrid composites affects the composite mechanics at a small scale in the v-notch specimen, the test still exhibits a limited region possessing a reasonably pure and uniform stress–strain state between the notches to meet the requirement for a desired shear test. Thus, the study indicates that the v-notch test can be used for the shear testing of the hybrid composites studied when it is correctly used.

Keywords

Iosipescu shear test v-notch specimen carbon–glass tow hybrid composites shear properties finite element modeling

Get full access to this article

View all access options for this article.

References

1. Iosipescu, N. (1967). New Accurate Procedure for Single Shear Testing of Metals, Journal of Materials, 2(3): 537–566.

2. Adams, D. F. and Thomas, R. L. (1969). The Solid-Rod Torsion Test for the Determination of Unidirectional Composite Shear Modulus, Textile Res. J., 39(4): 339–345.

3. Swanson, S. R. , Messick, M. and Toombes, G. R. (1985). Comparison of Torsion Tube and Iosipescu In-Plane Shear Test Results for a Carbon Fiber-Reinforced Epoxy Composite, Composites, 16: 220–224.

4. Walrath, D. E. and Adams, D. F. (1982). The Iosipescu Shear Test as Applied to Composite Materials, Experimental Mechanics, 27(2): 105–110.

5. Adams, D. F. and Walrath, D. E. (1987). Further Development of the Iosipescu Shear Test Method, Experimental Mechanics, 27(2): 113–119.

6. Barnes, J. A. , Kumosa, M. and Hull, D. (1987). Theoretical and Experimental Evaluation of the Iosipescu Shear Test, Composites Science and Technology, 28: 251–268.

7. Morton, J. , Ho, H. , Tsai, M. Y. and Farley, G. L. (1992). An Evaluation of the Iosipescu Specimen for Composite Materials Shear Property Measurement, Journal of Composite Materials, 26(5): 708–750.

8. Xing, Y. M. , Poon, C. Y. and Ruiz, C. (1993). A Whole-Field Strain Analysis of the Iosipescu Specimen and Evaluation of Experimental Errors, Composites Science and Technology, 47: 251–259.

9. Bansal, A. and Kumosa, M. (1995). Experimental and Analytical Studies of Failure Modes in Iosipescu Specimens under Biaxial Loadings, Journal of Composite Materials, 29(3): 334–358.

10.

10. Pierron, F. and Vautrin, A. (1997). Measurement of the In-Plane Shear Strength of Unidirectional Composites with the Iosipescu Test, Composite Science and Technology, 57: 1653–1660.

11.

11. Standard Test Method for Shear Properties of Composite Materials by the V-notched Beam Method, ASTM Standard D5379-93, American Society for Testing and Materials, Philadelphia. (May 1993).

12.

12. Chiang, M. Y. M. and He, J. An Analytical Assessment of Using the Iosipescu Shear Test for Hybrid Composites, Composites: Part B, 33(6): 461–470.

13.

13. ABAQUS (2000). Finite Element Analysis Code and Theory (Standard and CAE), Version 6. 1. Hibbitt, Karlsson & Sorensen, Inc., RI, USA.

14.

14. Tsai, Stephen W. (1980). Introduction of Composite Materials – Chapter 9: Micromechanics, pp. 388–401, Technomic Publishing Co., Inc., Westport, CT, USA.

15.

15. He, J. , Chiang, M. Y. M. and Hunston, D. L. (2001). Assessment of Sandwich Beam in Three-Point Bending for Measuring Adhesive Shear Modulus, Transaction of the ASME, Journal of Engineering Material and Technology, 123: 1–7.

16.

16. Chiang, M. Y. M. and Chai, H. (1994). Plastic Deformation Analysis of Cracked Adhesive Bonds Loaded in Shear, Int. J. Solids Structures, 31: 2477–2490.

Application of the V-Notch Shear Test for Unidirectional Hybrid Composites

Abstract

Keywords

Get full access to this article

References