Size and scale effects in composites: I. Literature review

Sutherland, L.S.; Shenoi, R.A.; Lewis, S. M.

doi:10.1016/s0266-3538(98)00065-7

Cited by 123 publications

(62 citation statements)

References 36 publications

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“…This can be attributed to the fact that the fibers with a longer gauge length have a greater amount of lower strength in the same quantity, which is expected to, on average, have a lower average strength compared with smaller fibers. This trend has been seen elsewhere with brittle fibers [3,18] and provides support for the fact that with larger test lengths, there are more flaws in the fibers, which make the probability of failure higher [19]. …”

Section: Size Dependence Of Fiber Strengthsupporting

confidence: 77%

Modified Weibull Distribution for Analyzing the Tensile Strength of Bamboo Fibers

Wang

Shao

2014

Polymers

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Abstract:There is growing evidence that the standard Weibull strength distribution is not always accurate for the description of variability in tensile strength and its dependence on the gauge size of brittle fibers. In this work, a modified Weibull model by incorporating the diameter variation of bamboo fiber is proposed to investigate the effect of fiber length and diameter on the tensile strength. Fiber strengths are obtained for lengths ranging from 20 to 60 mm and diameters ranging from 196.6 to 584.3 μm through tensile tests. It is shown that as the within-fiber diameter variation increases, the fracture strength of the bamboo fiber decreases. In addition, the accuracy of using weak-link scaling predictions based on the standard and modified Weibull distribution are assessed, which indicates that the use of the modified distribution provides better correlation with the experimental data than the standard model. The result highlights the accuracy of the modified Weibull model for characterizing the strength and predicting the size dependence of bamboo fiber.

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Section: Size Dependence Of Fiber Strengthsupporting

confidence: 77%

Modified Weibull Distribution for Analyzing the Tensile Strength of Bamboo Fibers

Wang

Shao

2014

Polymers

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“…Sutherland et al [17] summarized analytical methods to account for size and scale effects in composites, such as the weakest link, extended weakest link and fracture mechanics approaches. Weibull theory is widely used as the scaling law for unnotched composite laminates [2].…”

Section: Discussionmentioning

confidence: 99%

An experimental investigation into size effects in quasi-isotropic carbon/epoxy laminates with sharp and blunt notches

Wisnom

Mahadik

et al. 2014

Composites Science and Technology

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“…A vast research work has been done to explain mechanical behavior and failure mechanism of angleply laminate composites based on thermosetting matrix. The structural analysis of these anisotropic multilayered composites is centered on the influence of the fiber orientation of the different layers on the composite's mechanical properties (Pagano and Pipes, 1971;Schijve et al, 1979;Ishai et al, 1988;Sutherland et al, 1999;Fuller and Wisnom, 2015a).…”

Section: Introductionmentioning

confidence: 99%

Dimensional Scaling and Failure Pattern of the Tensile Properties of Angle-Ply Thermoplastic Composites of Twaron Fiber/Polypropylene

2018

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Thermoplastic multilayer composites with different fiber orientations were prepared with polypropylene and aramid fibers as reinforcing material. The prepregs were prepared in a continuous impregnation system using the dry powder method in a fluidized bed. The specimens were laminated by compression molding, tensile tested, and their fracture area was analyzed by microscopy. The mechanical performance of the laminates was influenced by the fiber orientation at the different layers. The fibers at 0 • conferred high stiffness to the composite, limiting the maximum deformation and promoting failure. The laminates with 0 • layers showed a fragile and sudden fracture oriented at 90 • to the aplied load, even with low fiber content. The plies oriented at ± 45 • balanced the stress and contributed to higher levels of deformation during the test due to fiber rotation toward the loading direction, also, no post-yield stiffening was found as in thermoset composites due to the ductile nature of the thermoplastic matrix; these layers limited the crack propagation in the transverse direction, canceling the in-plane shear stress. The fibers at 90 • acted as filler due to poor interface and did not contribute to the improvement of the composite mechanical performance. The evidence shows no delamination in the materials due to the tenacious nature of the thermoplastic matrix, neither saw-toothed or plateau region was found in the stress-strain curves in contrast to thermoset laminates.

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Size and scale effects in composites: I. Literature review

Cited by 123 publications

References 36 publications

Modified Weibull Distribution for Analyzing the Tensile Strength of Bamboo Fibers

Modified Weibull Distribution for Analyzing the Tensile Strength of Bamboo Fibers

An experimental investigation into size effects in quasi-isotropic carbon/epoxy laminates with sharp and blunt notches

Dimensional Scaling and Failure Pattern of the Tensile Properties of Angle-Ply Thermoplastic Composites of Twaron Fiber/Polypropylene

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