Pseudo-ductility and damage suppression in thin ply CFRP angle-ply laminates

Fuller, Jonathan; Wisnom, Michael R

doi:10.1016/j.compositesa.2014.11.004

Cited by 138 publications

(72 citation statements)

References 14 publications

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“…The value of E1 of Hexcel 913/E-glass which was measured as 43.9 GPa for 0.127 mm nominal ply thickness in [12] was corrected for the measured thickness of the glass layer which was 0.144 mm in the hybrid combination, reflecting the lower fibre volume fraction in the thicker plies. The mechanical properties of SkyFlex USN020A carbon layer were assumed as E1=101.7 GPa, E2= 6.0 GPa, G12=2.4 and 12=0.3 according to [13]. Separate tests have been performed on UD hybrid laminates of [G2/C4/G2] with a central cut in the carbon layers and the value of GIIc for the interface between these two different prepregs was found to be 1.0 N/mm using the procedure introduced in [14].…”

Section: Modelling Approachmentioning

confidence: 99%

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Numerical modelling of the damage modes in UD thin carbon/glass hybrid laminates

Jalalvand

Czél

Wisnom

2014

Composites Science and Technology

112

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This paper proposes a new FE-based approach for modelling all of the possible damage modes in glass/carbon UD hybrid laminates in tensile loading. The damage development is modelled by two sets of cohesive elements, (i) periodically embedded in the carbon layer for modelling carbon fibre failure and (ii) at the glass/carbon interface to capture delamination. The analysis is stopped when the glass layer failure is predicted by integrating the stress distribution over the glass layer to calculate an equivalent stress for unit volume of the glass. The proposed method is validated against the experimental results and then used to simulate the progressive damage process of other hybrid configurations and finally produce a damage-mode map for this material set. The method can easily be applied to other hybrids to assess their performance by producing damage-mode maps.

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Section: Modelling Approachmentioning

confidence: 99%

“…The shear strength of the cohesive elements was assumed 67 MPa based on the ±45 shear test results [13].…”

Section: Modelling Approachmentioning

confidence: 99%

Numerical modelling of the damage modes in UD thin carbon/glass hybrid laminates

Jalalvand

Czél

Wisnom

2014

Composites Science and Technology

112

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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%

“…However, they are limited by linear elasticity and often exhibit brittle, sudden, and catastrophic failure, which occurs without warning. Thermoplastic composites reinforced with continuous fiber are receiving much attention and growing interest in the industry for lightweight applications owing to many attractive advantages in comparison to composites based on thermoset matrices; their advantages are mainly based on the inherent properties of thermoplastic polymers used, such as fracture toughness and damage tolerance (higher strain to failure), recyclability, clean processability (shaping prior to consolidation and the ability to be reshaped), faster manufacturing and long shelf life (Gonzalez-Chi et al, 2004;Hufenbach et al, 2011;Hassan et al, 2013;Fuller and Wisnom, 2015a;Shan-Shan et al, 2018). On the other hand, the joint between plies in thermoplastic laminates is formed by fusion, consequently there is no interphase, thus failure by delamination is not possible (common failure mechanism of thermoset laminates).…”

Section: Introductionmentioning

confidence: 99%

“…The thin-ply method can be used to improve the pseudo-ductility behavior of laminate composites (Czél et al, 2016); the failure mode transformation from delamination to fiber break brings a different pseudoductility response; ply thickness plays a key role in controlling composite mechanical properties: the thinner the ply the better the properties (First Ply Failure Theory; Kim and Soni, 1984). Fuller and Wisnom (2015a) investigated carbon-epoxy multilayer laminates at [(±θ) 5 ] s with several angles between 15 and 45 • . Highly non-linear stress-strain behavior can be achieved with angle-ply laminates, whilst suppressing the damage mechanisms that normally cause premature failure.…”

Section: Introductionmentioning

confidence: 99%

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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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Temperature and loading speed sensitivity of glass/carbon inter‐ply hybrid polymer composites on tensile loading

Dasari

Saurabh

Prusty

2020

J of Applied Polymer Sci

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This study is focused on the evaluation of the tensile performance of glass/carbon inter-ply hybrid fiber-reinforced polymer composites at different combinations of temperatures and loading speeds. With an increase in the number of carbon/epoxy (CE) ply in glass/epoxy (GE) composites, some of the tensile properties as tensile modulus, strain at failure, and difference of strain at failure of different fibers are enhanced. Further, the change in the stacking sequence of the CE ply at a particular hybrid ratio alters the tensile properties as well as the nature of failure. Placing a CE ply in place of GE ply at the center in the GE composite resulted in hybrid composite (G 2 C 1 G 2) that imparts pseudo-ductility as well as hybrid effect in the composite. On the other hand, replacing a GE ply with CE at one end (C 1 G 4) and both ends (C 1 G 3 C 1) imparted improved strain at failure and positive hybrid effect in the composites. The tensile modulus of G 2 C 1 G 2 outstrips the modulus of CE and GE by 12.05% and 65.95% at a loading speed of 0.1 mm/min and a temperature of 110 C. Fractography analysis of neat as well as hybrid composites was done to analyze the fracture mechanism.

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Pseudo-ductility and damage suppression in thin ply CFRP angle-ply laminates

Cited by 138 publications

References 14 publications

Numerical modelling of the damage modes in UD thin carbon/glass hybrid laminates

Numerical modelling of the damage modes in UD thin carbon/glass hybrid laminates

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

Temperature and loading speed sensitivity of glass/carbon inter‐ply hybrid polymer composites on tensile loading

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