Compression testing of continuous fiber reinforced polymer composites with out-of-plane fiber waviness and circular notches

Elhajjar, Rani; Shams, Seyedmohammad

doi:10.1016/j.polymertesting.2014.02.004

Cited by 40 publications

(25 citation statements)

References 17 publications

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“…Experimental studies under compression load for fiber waviness were carried out by [23][24][25][26], all reporting a significant reduction on compression properties. Lemanski and Sutcliffe [27] numerically investigated the influence of fiber waviness under compression load.…”

Section: Mechanical Response Of Wavy Compositesmentioning

confidence: 99%

Numerical and experimental investigation of out-of-plane fiber waviness on the mechanical properties of composite materials

et al. 2020

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The limited capability to predict material failure in composite materials and specifically in wavy composite layers has led to high margins of safety for the design of composite structures. Thus, the full lightweight potential of this class of materials is left unused. To understand the complex failure behavior of composite materials containing out-of-plane fiber waviness under compressive and tensile loading, a non-linear 2D material model was implemented in ABAQUS and validated with extensive experimental test data from compression and tensile tests. Each test was recorded by a stereo camera system for digital image correlation to resolve damage initiation and propagation in detail. This study has shown excellent agreement of numerical simulations with experimental data. In a virtual testing approach various parameters, i.e. amplitude, wavelength and laminate thickness, have been studied. It was found that the failure mode changed from delamination to kink shear band formation with increasing laminate thickness. The wavelength has shown minor influences compared to amplitude and laminate thickness.

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Section: Mechanical Response Of Wavy Compositesmentioning

confidence: 99%

Numerical and experimental investigation of out-of-plane fiber waviness on the mechanical properties of composite materials

et al. 2020

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“…In addition, while the gas flow rate has a fixed quantity the increase of bed depth can cause the gas volume to decline (per unit volume of pellet); so the required energy to the pellet firing should be provided through other mechanisms. Obviously, the required energy in firing the magnetite pellet is lesser than the required amount for hematite pellet firing process (Jiang et al, 2008;Meyer, 1980;Seaton et al, 1983;Loo, 1991;Elhajjar and Shams, 2014;El-Hajjar, 2013a, 2013b). Consequently, the higher amounts of magnetite in pelletizing initial mixtures can lead to the increase of the bed depth due to the lower required thermal energy to pellet firing (Jiang et al, 2008;Meyer, 1980;Li et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous energy saving and production rate improvement in pelletizing process by solid fuel addition

Golmakani

Lagzian

Ghazanfari

et al. 2015

International Journal of Mineral Processing

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“…Wang et al [24] developed the transverse strip method and the ply-drop method for the outof-plane waviness. Placing a thin rod at the interface between plies was another frequently used method to generate in-plane and out-of-plane fiber waviness [17], [27]- [29]. In order to generate out-of-plane waviness, Hasiao and Daniel [22] and Allison et al [25] stacked plies that were pre-cured on curved mold between plies pre-cured on flat mold, thus, local out-ofplane fiber waviness were obtained between the flat plies.…”

Section: Introductionmentioning

confidence: 99%

Influences of out-of-plane fiber waviness on the curved beam strength of glass fiber composite laminates

Çınar¹

2020

Pamukkale J Eng Sci

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ÖzIn-plane and out-of-plane waviness are inevitable defects in parts that have curved sections made of continuous fiber-reinforced composites. These defects can be located in the micro, meso (ply level) and macroscale (part level). In this study, an artificial out-of-plane fiber waviness was generated on the outer surface of the curved section of the L-shaped laminates. The fiber waviness generated was characterized experimentally using micrographs taken from the samples. The effect of fiber waviness on curved beam strength and delamination of the samples were determined through bending tests. Also, the effect of fiber waviness on the strain distribution on the curved section was quantified using Digital Image Correlation (DIC) technique. Düzlem içi ve düzlem dışı dalgalanma, sürekli fiber takviyeli kompozitlerden yapılmış kavisli bölgelere sahip parçalarda kaçınılmaz kusurlardır. Bu kusurlar mikro, mezo (katman seviyesi) ve makro ölçekli (parça seviyesi) olabilir. Bu çalışmada, L şekilli laminatların kavisli bölümünün dış yüzeyinde yapay bir düzlem dışı fiber dalgası oluşturulmuştur. Elde edilen fiber dalgalanmaları, numunelerden alınan mikrogörüntüler kullanılarak deneysel olarak karakterize edilmiştir. Fiber dalgalanmaların kavisli kiriş mukavemeti ve numunelerin delaminasyonuna etkisi eğme testleri ile belirlenmiştir. Ayrıca, fiber dalgalanmasının eğri kesitteki birim şekil değiştirme dağılımına etkisi Sayısal Görüntü Korelasyonu (SGK) tekniği kullanılarak ölçülmüştür.

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Compression testing of continuous fiber reinforced polymer composites with out-of-plane fiber waviness and circular notches

Cited by 40 publications

References 17 publications

Numerical and experimental investigation of out-of-plane fiber waviness on the mechanical properties of composite materials

Numerical and experimental investigation of out-of-plane fiber waviness on the mechanical properties of composite materials

Simultaneous energy saving and production rate improvement in pelletizing process by solid fuel addition

Influences of out-of-plane fiber waviness on the curved beam strength of glass fiber composite laminates

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