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Analysis of the Rail Shear Test-Applications and Limitations

Analysis of the Rail Shear Test-Applications and Limitations,10.1177/002199837100500103,Journal of Composite Materials,J. M. Whitney,D. L. Stansbarger

Analysis of the Rail Shear Test-Applications and Limitations   (Citations: 27)
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A detailed theoretical and experimental analysis of the rail shear test is presented. A Fourier series solution is obtained for the stresses in an idealized rail shear specimen. The theoretical results are quali tatively verified on fiber reinforced rubber composites. Rail shear data on the modulus and strength of current high-modulus rein forced composites is compared to predicted values obtained from lamination theory. Results show that, despite definite limitations, the rail shear test can be useful in the determination of the in-plane shear properties of a laminated composite.
Journal: Journal of Composite Materials - J COMPOS MATER , vol. 5, no. 1, pp. 24-34, 1971
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    • ...A tensile test to investigate properties such as Young's moduli and Poison's ratio of fiber-resin composites was suggested by ASTM test standard D3039-76; For evaluation of lamina inplane shear moduli, there are four generally accepted test methods [l]: the [f45], coupon test by Rosen [2], the off-axis coupon test, the rail shear test method [3], and the torsion test [4]...

    Chiayu Fuet al. Temperature-dependent material characterizations for thin epoxy FR4/ E...

    • ...= - (gk)i (3) Rewriting eq (3) in matrix notation,...

    R. Prabhakaranet al. Application of the least-squares method to elastic and photoelastic ca...

    • ...The material properties input to the beam rails were those of Ti-6A1-4V, a titanium alloy 7 and are listed in Table I. Graphite-polyimide material properties ~ were input to the quadrilateral elements and are listed in Table 1. Four laminates having the following ply orientations were investigated: [0~2], [90,2], [_+452],, and [90, +_45,0L...
    • ...The nondimensionalized normal-stress distribution ay/? for the [0,2] specimens diagonally loaded is shown in Fig. 4. Ideally, normal stress values of zero are desired throughout the specimen test section...
    • ...Both tapered- and uniform-rail finite-element models were investigated for the [0,~] and [90,2] laminates...
    • ...Shear stresses along the vertical and horizontal center lines of the test section were zero for both the [0,~] and [90,2] laminates due to symmetry...
    • ...In the analysis, mechanical loading produced stress concentrations in the direction transverse to the fibers in the [0,2] laminate...
    • ...various parameters and number of tests conducted during the test program are listed in Table 3. The [0,2] and [90,2] Laminates...
    • ...various parameters and number of tests conducted during the test program are listed in Table 3. The [0,2] and [90,2] Laminates...
    • ...The room-temperature shear stress-strain behavior and ~shear tangent modulus-strain behavior of the [0,2] and [90,2] laminates is illustrated in Fig. 8. These data were obtained using the bolted, uniform-rail configuration...
    • ...The room-temperature shear stress-strain behavior and ~shear tangent modulus-strain behavior of the [0,2] and [90,2] laminates is illustrated in Fig. 8. These data were obtained using the bolted, uniform-rail configuration...
    • ...The standard error of estimate for the [0,2] and [90,2] laminates is 0.5 MPa for an average ultimate shear stress of 33 MPa, and 1.81 MPa for an average ultimate shear stress of 64 MPa, respectively...
    • ...The standard error of estimate for the [0,2] and [90,2] laminates is 0.5 MPa for an average ultimate shear stress of 33 MPa, and 1.81 MPa for an average ultimate shear stress of 64 MPa, respectively...
    • ...The shear modulus for the [0,2] and [90,2] laminates ranges from 2.0 to 4.5 GPa and 0.53 to 4.8 GPa, respectively...
    • ...The shear modulus for the [0,2] and [90,2] laminates ranges from 2.0 to 4.5 GPa and 0.53 to 4.8 GPa, respectively...
    • ...Ideally, the [0,2] and [90,2] laminates should exhibit the same shear behavior...
    • ...Ideally, the [0,2] and [90,2] laminates should exhibit the same shear behavior...
    • ...The analytical results indicate that: (a) the shear-stress responses of the two laminates are essentially the same; (b)the [0,2] laminate will have a large normal-stress concentration (ox) transverse to the fibers in the vicinity of the free edge; and (c) the [90,2] laminate will have a large normal-stress concentration (ox) parallel to the fibers in the vicinity of the free edge...
    • ...The analytical results indicate that: (a) the shear-stress responses of the two laminates are essentially the same; (b)the [0,2] laminate will have a large normal-stress concentration (ox) transverse to the fibers in the vicinity of the free edge; and (c) the [90,2] laminate will have a large normal-stress concentration (ox) parallel to the fibers in the vicinity of the free edge...
    • ...The normal-stress concentration for the [0,2] laminate occurs in a weak material direction, as opposed to the [90,2] laminate in which the normal-stress concentration occurs in a strong material direction...
    • ...The normal-stress concentration for the [0,2] laminate occurs in a weak material direction, as opposed to the [90,2] laminate in which the normal-stress concentration occurs in a strong material direction...
    • ...Thus, the [0,2] laminate is expected to and does fail at a load strain level considerably lower than the maximum level attained by the [90,2] laminate...
    • ...Thus, the [0,2] laminate is expected to and does fail at a load strain level considerably lower than the maximum level attained by the [90,2] laminate...
    • ...Thus, the experimental data support these analytical results indicating that the [90,2] laminate should be used instead of the [0,~] laminate for determining the shear modulus and ultimate shear stress for unidirectional material when using the rail sheartest method...

    R. Garciaet al. An experimental and analytical investigation of the rail shear-test me...

    • ...It follows from eq (4) that the ratio between the principal stresses is given by...

    M. Arcanet al. A method to produce uniform plane-stress states with applications to f...

    • ...In the case of well-known composite laminates (e. g. fibre plastic materials), of the methods used in measuring the inplane shear strength, Tube testing ([40], [41]), Rail shear test [42], "Picture Frame" test [43] and the Iosipescu method [44] may be mentioned, and it is considered that some of these techniques could be adapted for determining the IPS of fibre concrete without much, difficulty, depending on the actual nature of ...

    A. J. Majumdaret al. Fibre concrete materials

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