Experimental and numerical investigations on microstructures and mechanical properties of hybrid fiber reinforced thermoplastic polymer

Wang, Qian; Sun, Lingyu; Li, Lijun; Wu, Yang; Zhang, Yiben; Dai, Zongmiao; Xiong, Zhenkai

doi:10.1016/j.polymertesting.2018.07.010

Cited by 25 publications

(24 citation statements)

References 42 publications

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“…The interaction energy of interface between polymer layers is mainly composed of van der Waals and electrostatic interaction energy. [ 27,29 ] Hence, the joining energy E joining at the interface was calculated by the following Equation ):

E_{joining} = E_{total} - ((), E_{italicPP 1} + E_{italicPP 2})

where E total , E PP 1 , and E PP 2 are the total energy of PP‐PP system, the energy of overmolded PP layer, and the energy of PP layer in CFR‐PP part, respectively. As listed in Table 3, the joining energy at the interface increases with decreasing thermal gradient.…”

Section: Resultsmentioning

confidence: 99%

“…The matrix layers are positioned at the outer layer of both SFR‐PP and CFR‐PP, thus the mechanical properties of the nanoscale interface in the present work are mainly determined by the matrix and are slightly influenced by fibers. [ 27 ] The atomistic model of the interface between SFR‐PP and CFR‐PP was constructed simply as that of PP‐PP interface, as shown in Figure 6. The size of the initial simulation box is 4.0 nm × 4.0 nm × 13.3 nm.…”

Section: Methodsmentioning

confidence: 99%

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Effect of thermal gradient on interfacial behavior of hybrid fiber reinforced polypropylene composites fabricated by injection overmolding technique

et al. 2020

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Hybrid fiber reinforced thermoplastic composites, fabricated by overmolding technique, are a novel class of lightweight components that benefit from the high mechanical performance of continuous fiber reinforced thermoplastics (CFRT) as well as geometric complexity because of short fiber reinforced thermoplastics (SFRT) composites architecture. The heterogonous interface between CFRT and SFRT in the hybrid structure was generated when SFRT was injected on CFRT surface during overmolding processing. However, the unmatched thermal properties between SFRT and CFRT may cause the poor adhesion at the interface due to the variation of temperature. In this article, how the thermal gradient affects the interfacial properties of hybrid structures is investigated through numerical and experimental methods. The results obtained from the molecular dynamics simulation demonstrate that decreasing thermal gradient can accelerate the molecular diffusion across the interface. Thus, at lower thermal gradient, the gap at interface is gradually disappeared. The results of the interfacial strength estimated by tensile lap shear test method show that the interfacial shear strength is greatly improved by decreasing thermal gradient because of higher crystallinity and bigger spherulite size of PP matrix at interface. In addition, the fracture mechanism of hybrid structure is observed to evolve with thermal gradient.

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E_{joining} = E_{total} - ((), E_{italicPP 1} + E_{italicPP 2})

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of thermal gradient on interfacial behavior of hybrid fiber reinforced polypropylene composites fabricated by injection overmolding technique

et al. 2020

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“…The firm adhesive at bonding interfaces is essential for efficient stress transfer which directly affects the overall mechanical performance of hybrid laminates. [25,26] For hybrid laminates, the tensile property should meet the composite mixing theorem. [27] This theorem can be used to verify the reliability of the bonding of hybrid laminates.…”

Section: Resultsmentioning

confidence: 99%

Impact and Flexural Properties Studies on Carbon Fiber Reinforced Epoxy/Polycarbonate Hybrid Laminates with Different Stacking Sequence

et al. 2020

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Carbon fiber (CF) hybrid laminates with excellent mechanical properties have attracted great attention. Herein, CF reinforced epoxy/polycarbonate (CF/Epoxy/ PC) hybrid laminates are fabricated via laser surface processing and hot-pressing technique. Several mechanical tests, including uniaxial tensile, flexural, and impact, are conducted to assess the effect of stacking sequence on the prepared hybrid laminates. In addition, failure behaviors and morphologies are observed to analyze the interaction mechanism between the two laminates. Experimental results indicate that the tensile properties of hybrid laminates conform to the rules of mixture. The best flexural properties and impact peak force are found in Epoxy-PC hybrid laminates. However, due to the transfer phenomenon of flexural point during the impact process, PC-Epoxy hybrid laminates possess the best impact energy absorption. Furthermore, the introduction of CF/PC laminates greatly mitigates the out-of-plane fracture process of CF/Epoxy laminates during a flexural test. However, its in-of-plane fracture area has a further increase during the impact process, which illustrates the synergetic enhancement ability of hybrid laminates.

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“…Overmolded hybrid composites are now in use in the automotive industry, such as front-end module, seat back, bumper beams, and instrument-panel cross beams. 2,3 In automotive industry, many components might be subjected to dynamic loading in service, such as crashes and impacts. 4 In terms of processing materials for overmolded hybrid composites, both the commonly used thermoplastic polymer and CFRT exhibit loading rate dependence.…”

Section: Introductionmentioning

confidence: 99%

The effect of loading rate on the interfacial behavior of overmolded hybrid fiber reinforced polypropylene composites

Jiang

Ding

Wang

et al. 2021

J of Applied Polymer Sci

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In the present work, the interfacial behavior of overmolded hybrid fiber reinforced polypropylene composites (hybrid composites) under the loading rate of 1, 10, and 100 mm/min are studied by experimental methods. The interfacial mechanical properties of hybrid composites are determined by monotonic and cycle loading-unloading single-lap-shear tests. The experimental results reveal that interfacial shear strength increases with loading rate, while the shear stiffness shows insensitive to loading rate. A regression function is built to describe the variation of interfacial shear strength with loading rate. The cyclic loading-unloading curves of hybrid composites samples indicate that loading rate effects on the interfacial nonlinear behavior of hybrid composites are considered by affecting plastic deformation. In addition, scanning electron microscopy and digital image correlation observations reveal the failure mechanisms of overmolded hybrid composites. The failure behavior of overmolded hybrid composites is mainly CFRT laminate failure for all cases.The evolution of non-uniform strain fields indicates that the fracture of overmolded thermoplastic composites may initiate at the edges and spread out to the far fields.

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Experimental and numerical investigations on microstructures and mechanical properties of hybrid fiber reinforced thermoplastic polymer

Cited by 25 publications

References 42 publications

Effect of thermal gradient on interfacial behavior of hybrid fiber reinforced polypropylene composites fabricated by injection overmolding technique

Effect of thermal gradient on interfacial behavior of hybrid fiber reinforced polypropylene composites fabricated by injection overmolding technique

Impact and Flexural Properties Studies on Carbon Fiber Reinforced Epoxy/Polycarbonate Hybrid Laminates with Different Stacking Sequence

The effect of loading rate on the interfacial behavior of overmolded hybrid fiber reinforced polypropylene composites

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