Increased breaking strain of carbon fiber-reinforced plastic and steel hybrid laminate composites

Sung, Myung Whun; Jang, Jin-Wook; Tran, Van Loi; Hong, Sung-Tae; Yu, Woong‐Ryeol

doi:10.1016/j.compstruct.2019.111768

Cited by 16 publications

(15 citation statements)

References 41 publications

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“…26 In our previous study on carbon fiber-reinforced plastic (CFRP)/steel hybrid laminate composites, tensile properties were experimentally obtained for composites with or without interfacial adhesion. 27 That study confirmed that the fracture strain of CFRP/ steel hybrid laminate composites with interfacial adhesion was up to 0.3% greater than that of pure CFRP. Although this observation can be found in the literature, it has often been overlooked.…”

Section: Introductionsupporting

confidence: 61%

A micromechanical model of carbon fiber-reinforced plastic and steel hybrid laminate composites

Sung

Ahn

Jang

et al. 2021

Journal of Composite Materials

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The fracture strain of carbon fiber-reinforced plastics (CFRPs) within CFRP/steel hybrid laminate composites is reportedly higher than that of CFRPs due to transverse compressive stress induced by the steel lamina. A micromechanical model was developed to explain this phenomenon and also to predict the mechanical behavior of CFRP/steel hybrid laminate composites. First, the shear lag theory was extended to calculate stress distributions on fibers and matrix material in a CFRP under multiaxial stress condition, considering three deformation states of matrix (elastic and plastic deformation and fracture) and the transverse compressive stress. Then, the deformation behavior of CFRP was predicted using average stress in the ineffective region and the Weibull distribution of carbon fibers. Finally, the mechanical properties of CFRP/steel hybrid laminate composites were predicted by considering the thermal residual stress generated during the manufacturing process. The micromechanical model revealed that increased transverse compressive stress decreases the ineffective lengths of partially broken fibers in the CFRP and results in increased fracture strain of the CFRP, demonstrating the validity of the current micromechanical model.

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Section: Introductionsupporting

confidence: 61%

A micromechanical model of carbon fiber-reinforced plastic and steel hybrid laminate composites

Sung

Ahn

Jang

et al. 2021

Journal of Composite Materials

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“…These enhancements are believed to be due to the transverse compressive stress on GFRP following yielding of titanium layers resulting from high Poisson's ratio of titanium sheet when compared to GFRP laminate. 38 Moreover, this improvement also causes FMLs 3/2-0.4, 4/3-0.4(O), and 4/3-0.2(O) with their failure strains to increase by 19%, 31%, and 34% when associated with FML 2/1-0.6, with higher and similar strains are exhibited by both FMLs 4/3. The FMLs failure strains are about 2-3 times higher when compared to [0/90] s laminate.…”

Section: Discussionmentioning

confidence: 98%

“…A similar study of FML is reported in Sharma and Parameswaran. 36 The quasistatic tensile behavior of FML is affected by distributing aluminium layers through the FML thickness as reported in Sharma et al 37 Sung et al 38 have reported that for CFRP/steel laminates, the CFRP constituent with its fracture strain increases by up to 20% under dynamic tension. Moreover, the optimal design of laminates is identified using the micromechanical theory.…”

Section: Introductionmentioning

confidence: 91%

Effect of high strain rate on tensile response and failure analysis of titanium/glass fiber reinforced polymer composites

Sharma

Velmurugan

2021

Journal of Composite Materials

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The high strain rate tensile response of titanium-based fiber metal laminates (FMLs), consisting of layers of titanium Ti-6Al-4V alloy sheet and glass fiber reinforced composites, is examined. A hand layup method is used to fabricate four different layups of FMLs, exhibiting the same thickness of the total metal layer. A split Hopkinson tensile bar apparatus is used to load titanium and composite under a high strain rate to obtain baseline data. High-speed digital image correlation is used to measure the strain directly on the specimen gage region. The elastic-plastic response of FMLs up to maximum stress is predicted by the classical laminated plate model and orthotropic plasticity model. This is followed by a behavior considering the mechanics of delamination. The results show that the layup sequence of titanium-based FMLs considerably affects the failure behavior of composites following ultimate strength. This strength increases at high strain rates and seems higher for titanium-based FMLs than aluminium-based FMLs. This is primarily caused by the rate-dependent response of the titanium and composite. The failure strain of glass fiber reinforced epoxy (GFRP) constituent, failure strain, and toughness of FMLs are affected by isolating composite layers by metallic layers within FMLs and are found to be rate sensitive. Isolation of composite layers from one another by metallic layers results in more progressive failure of FMLs. The proposed models are validated with experiments of aluminium-based FMLs available in the literature.

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“…In the test, the specimens are positioned and fixed on the press machine in Figure 10. A strain gauge is attached to the defect area of specimens to record the material's stress Advances in Materials Science and Engineering response when it fails [34,35]. After the start of the test, the specimen has a buckling deformation.…”

Section: Test Setupmentioning

confidence: 99%

Study on the Effect of Different Delamination Defects on Buckling Behavior of Spar Cap in Wind Turbine Blade

Wang

Zhang

et al. 2020

Advances in Materials Science and Engineering

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Delamination is detrimental to the composite materials, and it may occur in the manufacturing process of the unidirectional laminate of the spar cap in wind turbine blades. This paper studies the effect of different delamination defects on the strength of the unidirectional laminate. The finite element model of laminate with different delamination areas and delamination heights is established using solid elements. The eigenvalues of laminates have different parameters calculated based on the finite element method. The final coupon test is used to verify the conclusions of simulation results. The finite element method presented in this study shows excellent capabilities to predict the buckling behavior of the laminate. The buckling eigenvalue of tested laminate is negatively correlated with the delamination area and positively correlated with the delamination height under the edgewise load. The S11, which is too high at the boundary of the delamination region, plays a significant role in buckling failure. It has a particular reference value for testing the laminate of blade both in theory and practice.

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Increased breaking strain of carbon fiber-reinforced plastic and steel hybrid laminate composites

Cited by 16 publications

References 41 publications

A micromechanical model of carbon fiber-reinforced plastic and steel hybrid laminate composites

A micromechanical model of carbon fiber-reinforced plastic and steel hybrid laminate composites

Effect of high strain rate on tensile response and failure analysis of titanium/glass fiber reinforced polymer composites

Study on the Effect of Different Delamination Defects on Buckling Behavior of Spar Cap in Wind Turbine Blade

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