Static and Fatigue Interlaminar Tensile Characterization of Laminated Composites

Koudela, Kevin L.; Strait, Larry H.; Caiazzo, Anthony A.; Gipple, Karin L.

doi:10.1520/stp19945s

Cited by 3 publications

(3 citation statements)

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“…There is also a volumetric effect, which in Figure 14 is illustrated by differences in strength between the 16, 24 and 48 ply laminates and between 12.7 and 25.4 mm wide specimens. Similar effects have been observed in [21] and in [25]. In [26] it was demonstrated that the differences in strength between specimens of different width could be fully accounted for by using a Weibull volume scaling law, as suggested in [22].…”

Section: Flexural Loadingsupporting

confidence: 71%

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A survey of test methods for multiaxial and out-of-plane strength of composite laminates

Olsson¹

2011

Composites Science and Technology

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To cite this version:Robin Olsson. A survey of test methods for multiaxial and out-of-plane strength of composite laminates.Composites Science and Technology, Elsevier, 2011, 71 (6) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. and other textile systems. Tubular and cruciform specimens can provide arbitrary inplane loading, while off-axis and angle-ply specimens provide specific biaxial loadings.Tensile and compressive out-of-plane strength may be determined by axial loading of specimens with a waisted gauge section, while bending of curved specimens allow determination of the out-of-plane tensile strength. Tests suited for out-of-plane shear strength include the short beam shear test, the inclined double notch test and the inclined waisted specimen. Testing of arbitrary tri-axial stress states using tubular or cruciform specimens with superimposed through-the-thickness loading is highly complex and significant problems have been reported in achieving the intended stress states and failure modes. Specific tri-axial stress states can be obtained by uniaxial loading of specimens with constrained expansion, as in the die channel test.

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Section: Flexural Loadingsupporting

confidence: 71%

“…A spool specimen was developed in [21]. The geometry is similar to the one shown in Figure 10, but the specimen cross sections are cylindrical rather than rectangular.…”

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confidence: 99%

A survey of test methods for multiaxial and out-of-plane strength of composite laminates

Olsson¹

2011

Composites Science and Technology

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“…As in spin tests, residual radial stresses must be accounted for in diametric tension tests. One test method that essentially eliminates the residual stress question is the tensile coupon test in which a coupon is machined out of a thick body of material, as described by Koudela et al [7] for laminated composites. Tensile coupons are excellent for determining elastic constants, but strength results can be affected by stress concentration near grips and specimen machining costs can be prohibitive if radial tensile strength is the only quantity of interest.…”

Section: Introductionmentioning

confidence: 99%

C-Shape Specimen for Tensile Radial Strength of Thick, Filament-wound Rings

Sharma

Bakis

2006

Journal of Composite Materials

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The objective of this investigation is to evaluate a new method of testing thick, C-shaped rings for determining the radial tensile strength of thick, filament-wound composite structures such as flywheel rotors. The proposed method of loading C-rings with a hydraulic jack is simpler than previously used loading methods and is shown to be quite tolerant of eccentricity of the jack. It is shown by sectioning a C-ring that residual stresses in the specimen are negligible. Based on a detailed stress analysis and post-failure inspections of appropriately dimensioned specimens, it is concluded that failure is caused by radial tensile stress at a single critical location in the specimen. The radial tensile strengths of four candidate flywheel rotor materials measured with C-rings were generally less than strengths measured with flexure specimens. The simplicity of specimen preparation and testing by the proposed method, in conjunction with promising early results, suggests that the C-ring test method is suitable for widespread use and possible standardization.

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Through-thickness fatigue behavior of non-crimp fabrics featuring manufacturing defects

Hörrmann

Adumitroaie

Schagerl

2016

Procedia Structural Integrity

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Static and Fatigue Interlaminar Tensile Characterization of Laminated Composites

Cited by 3 publications

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A survey of test methods for multiaxial and out-of-plane strength of composite laminates

A survey of test methods for multiaxial and out-of-plane strength of composite laminates

C-Shape Specimen for Tensile Radial Strength of Thick, Filament-wound Rings

Through-thickness fatigue behavior of non-crimp fabrics featuring manufacturing defects

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