Evaluation of in-plane shear test methods for advanced composite materials by the decision analysis technique

Lee, S.; Munro, M.

doi:10.1016/0010-4361(86)90729-9

Cited by 123 publications

(38 citation statements)

References 16 publications

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“…(1977), Terry (1979) and Hahn (1973). The method is also highly recommended by several researchers (see for example Munjal(1989) and Lee and Munro (1986)). In a recent investigation, Dickson et.…”

Section: Tensile Test On 145' Symmetric Laminate (Astm D3518-94)mentioning

confidence: 99%

“…(1990) reponed good agreement between the results obtained by the 10" off-axis test and the other acceptable methods when specimens with suficiently long length were used and/or the appropriate correction factor was applied. Lee and Munro (1986). who evaluated nine in-plane shear test rnethods, ranked the method below the MSO and the Iosipescu shear methods, as the most promising testing method.…”

Section: " Off-axis Tensile Testmentioning

confidence: 99%

“…However, for the through-the-thickness shear propenies, one needs specimens with 20 mm thickness, which are usually difficult to prepare. Lee and Munro (1986) ranked the Iosipescu shear test beside the k45" tensile test as the most practical technique currently available for testing FRPC. Walrath and Adams ( 1983) and Adams and Walrath (1987) also considered the method as one of the most versatile methods for measuring the shear properties of FRPC.…”

Section: Strain Gages 7 1'mentioning

confidence: 99%

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A New Test Method for Measuring the Longitudinal and Shear Moduli of Fiber Reinforced Composites

Jalali¹,

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

1999

Journal of Composite Materials

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A new test method for the simultaneous evaluation of the longitudinal and the shear moduli of fiber reinforced plastic composites (FRPC) is introduced. Under the proposed method, specimens with different span to depth ratios (Llh) are subjected to three-point bending. Therefore, we name the method the "Varying Span Method" (VSM). The method builds on the inherent low shear modulus characteristics of FRPC. This characteristic leads to a flexural modulus which is a function of LMh. Eliminating the effect of local deformation from the test results, the flexural modulus (beside the geometry of the specimen) is a function of the longitudinal and the through-the-thickness shear moduli. These moduli can be obtained from the results of at least two tests on specimens with different Llh. For this, two distinctly different theories are introduced. A special apparatus is used to eliminate the effect of local deformations. The factors that may affect the accuracy and efficiency of the results are investigated and discussed. The validity of the proposed method is demonstrated by theoretical and experimental evaluations. The moduli of graphite/epoxy and Kevlar/epoxy composites, as measured by VSM, are reported. The measured values were found to be in very good agreement with the values evaluated by other standard methods.

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Section: Tensile Test On 145' Symmetric Laminate (Astm D3518-94)mentioning

confidence: 99%

Section: " Off-axis Tensile Testmentioning

confidence: 99%

Section: Strain Gages 7 1'mentioning

confidence: 99%

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A New Test Method for Measuring the Longitudinal and Shear Moduli of Fiber Reinforced Composites

Jalali¹,

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

1999

Journal of Composite Materials

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“…This method prevailed amongst others in the review of Lee et al [20] and is also used by Yang et al [21], to investigate shear strength degradation due to CA loading. The latter is the only work published so far on degradation of in-plane shear strength of a UD composite.…”

Section: Materials and Test Specimensmentioning

confidence: 96%

Using acoustic emission to assess shear strength degradation in FRP composites due to constant and variable amplitude fatigue loading

Philippidis

Assimakopoulou

2008

Composites Science and Technology

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“…These include Iosipescu, torsional tube, cross-beam sandwich, AE45 tensile, Arcan and 10 off-axis shear tests [16]. One of the most commonly used tests is the Iosipescu shear test because of its relative ease of fabrication and testing, low cost and accuracy of shear strength values obtained [17][18][19][20][21]. The Iosipescu test ideally results in pure shear at the center of the specimen along the line connecting the notch roots.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Shear Strength of T650-35/HFPE-II-52 Polyimide Matrix Unidirectional Composite

Bhargava

Zehnder

2006

Exp Mech

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The shear strength of a 4-ply unidirectional composite laminate consisting of carbon fibers (T650-35) and a polyimide matrix (HFPE-II-52) was measured over a temperature range of 25 to 315 C. The tests were performed using a Iosipescu test sample, modified to provide a more uniform shear stress distribution across the gauge section and loaded with an Arcan type test fixture. The test specimen design is based on the results of an extensive finite element study. Shear strength tests were performed on dry, 50% RH and 100% RH moisture saturated samples. Results of the experiment show that shear strength decreases from approximately 120 MPa at 25 C to 60 MPa at 315 C and that moisture saturated samples have a 5-10 MPa lower shear strength than dry samples.

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Evaluation of in-plane shear test methods for advanced composite materials by the decision analysis technique

Cited by 123 publications

References 16 publications

A New Test Method for Measuring the Longitudinal and Shear Moduli of Fiber Reinforced Composites

A New Test Method for Measuring the Longitudinal and Shear Moduli of Fiber Reinforced Composites

Using acoustic emission to assess shear strength degradation in FRP composites due to constant and variable amplitude fatigue loading

High Temperature Shear Strength of T650-35/HFPE-II-52 Polyimide Matrix Unidirectional Composite

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