Study on formability and failure modes of steel/CFRP based FMLs consisting of carbon fiber reinforced polymer prepreg and steel sheet

Guo, Yuqin; Chen, Zhanfu; Li, Fuzhu; Xu, Xingming; Chen, Jing; Ren, Yi; Wang, Yun

doi:10.1016/j.compstruct.2021.114980

Cited by 15 publications

(6 citation statements)

References 15 publications

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“…The surface of the aluminum alloy was pre-treated by polishing. The property parameters of aluminum alloy provided by the manufacturer were as follows: the density was 2.7 g/cm 3 , and the tensile strength and modulus were 374 MPa and 71GPa. 5 The material properties of fiber-reinforced thermoplastic prepregs are listed in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…1 FMLs have been initially applied in the aerospace industry, such as Glare ® and CARALL ® , which were fabricated by glass or carbon fiber reinforced thermoset composites and aluminum layers. [2][3][4][5][6] It has been reported that FMLs not only possess excellent fatigue resistance and high strength of FRP but also maintain the ductility of metal materials with high specific stiffness, low crack propagation, and good dynamic properties. [7][8][9] In general, the traditional and commercial FMLs are based on fiber-reinforced thermosetting resins (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Fiber metal laminates (FMLs) are a new type of hybrid composites, which consist of metal sheets and fiber‐reinforced plastic (FRP) composite layers 1 . FMLs have been initially applied in the aerospace industry, such as Glare® and CARALL®, which were fabricated by glass or carbon fiber reinforced thermoset composites and aluminum layers 2–6 . It has been reported that FMLs not only possess excellent fatigue resistance and high strength of FRP but also maintain the ductility of metal materials with high specific stiffness, low crack propagation, and good dynamic properties 7–9 …”

Section: Introductionmentioning

confidence: 99%

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Investigation of structure–flexural response relations in thermoplastic carbon/glass fiber‐metal laminates

Sang,

Xing,

et al. 2024

Polymer Composites

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In the current work, fiber‐metal laminates (FMLs) consisting of alternated continuous fiber‐reinforced thermoplastic composite layers and aluminum alloy sheets were proposed by the hot‐pressing method. Carbon fiber‐reinforced polyamide 6 (PA6/CF) and glass fiber‐reinforced polypropylene (PP/GF) prepregs were selected as composite layers. The effect of the assembly method between composite prepreg and aluminum sheets as well as the stacking configurations on the flexural response of FMLs were investigated. Meanwhile, the macro and micro‐structural observations were performed to characterize failure mechanisms in these structures. Experimental results revealed that the strength and stiffness of hybrid FLMs depended on the material property on the surface layer. With the stacking sequence of aluminum sandwiched by PA6/CF achieved the highest flexural strength of 535.3 MPa and modulus of 63.6 GPa in the series of FMLs, which could achieve satisfied lightweight and strength‐stiffness properties. The ductile deformation of aluminum sheets and fracturing and pulling out of the fibers were the main characterized failure mechanisms of thermoplastic FMLs. For glass fiber‐metal laminates, stacking configurations of three aluminum sheets alternation with four PP/GF intermediate layers achieved a favorable flexural property. Above all, the proposed thermoplastic FMLs have great potential in civil applications especially in the automobile industry as structural parts.Highlights Thermoplastic fiber‐metal laminates are designed and fabricated. The assembly method and stacking sequences influence the flexural property. FMLs with PA6/CF and aluminum achieve satisfied strength stiffness. PP/GF prepreg and aluminum layer display ductile deformation mode.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of structure–flexural response relations in thermoplastic carbon/glass fiber‐metal laminates

Sang,

Xing,

et al. 2024

Polymer Composites

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“…Despite the considerable number of studies in the literature about the debonding failure of the steel/CFRP(n) adhesive joint [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ], few systematic studies on the bond behavior between steel sheets and GFRP(m) polymer composites have been performed, and a very limited number of papers have been published that focus on this topic [ 28 , 29 , 30 , 31 ]. To the best knowledge of the authors, no research has been published on the mechanical behavior of the adhesive bonds between steel sheets and GFRP(m)/CFRP(n) hybrid composites under three-point bending.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Mechanical Behavior of Steel/GFRP/CFRP Hybrid Structure under Bending Loading with Adhesive Bond Strength Assessment

Marszałek

Stadnicki

2023

Materials

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Adhesive bonding between steel and carbon-fiber-reinforced polymer (CFRP) composite leads to hybrid structures that combine the high strength and ductility of steel with the excellent specific strength and stiffness of CFRP composite. There is, however, a concern regarding possible galvanic corrosion when steel and carbon fibers are bonded together. One way to overcome this problem is placing glass fiber-reinforced polymer (GFRP) composite between the steel and CFRP composite, creating a more complex steel/GFRP/CFRP hybrid structure. Therefore, experimental and numerical studies on the mechanical behavior of the adhesive bonds between the steel sheet and the GFRP/CFRP hybrid composite were carried out. Among the different failure patterns, mode II was chosen for analysis because metal–polymer composite structures are usually subjected to bending, and debonding may occur due to in-plane shear stress. The tested steel/GFRP/CFRP hybrid structure was made of a hot-formed 22MnB5 boron steel sheet, intermediate single-ply bidirectional GFRP composite, and three-ply unidirectional CFRP composite. Additional mechanical tests were also carried out to determine various engineering constants of the components to simulate the debonding process. A finite element model of the steel/GFRP/CFRP hybrid structure with a typical cohesive interface was established and verified against the experimental data. The results showed that due to the use of various materials, the dominant failure modes in the hybrid structure under bending loading were a brittle fracture of the CFRP composite and debonding between the steel and the GFRP composite. However, the load-bearing capacity of the hybrid structure was five times greater than that of a non-reinforced steel sheet. In addition, its mass was only 28% greater than the non-reinforced steel sheet. The obtained results provided valuable conclusions and useful data to continue further research on the mechanical behavior of steel/GFRP/CFRP hybrid structures.

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“…[1][2][3][4] Based on this high performance, it is widely used in aerospace, vehicle engineering, national defense engineering, and other fields. [5][6][7][8] Currently used FMLs primarily thermosetting FMLs, which exhibit disadvantages of long curing time, low interfacial fracture toughness, and difficult repair. [9,10] In recent years, thermoplastic fiber metal laminates (TP-FMLs) have been developed to overcome the shortcomings of thermosetting FMLs.…”

Section: Introductionmentioning

confidence: 99%

Self‐resistance heating forming and performance analysis of Al/PEEK/CFRP laminates

Zhang

Lü

et al. 2022

Polymer Composites

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To shorten the preparation cycle of Al/PEEK/CFRP laminates fabricated by Al sheets, peek films, and CFRP prepreg and reduce energy consumption during the preparation process to ensure the highest quality laminates, a novel forming process based on self-resistance electric (SRE) heating was proposed. Considering the tensile properties, fracture morphology, and void content comprehensively, the influence of current intensity (11.5, 12.5, 13.5 A) on the forming quality of laminates was explored. This optimized electric heating process was compared with the traditional heating process with respect to forming time, energy consumption, and the performance of the prepared samples. The results show that when the current is 12.5 A, the molding quality of the samples prepared by the SRE process is better than that of the traditional process.In addition, the SRE process significantly reduces forming times and saves energy. This SRE heating method provides a new process optimization pathway for the preparation and formation of fiber metal laminates and exhibits great prospects for future research.

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Study on formability and failure modes of steel/CFRP based FMLs consisting of carbon fiber reinforced polymer prepreg and steel sheet

Cited by 15 publications

References 15 publications

Investigation of structure–flexural response relations in thermoplastic carbon/glass fiber‐metal laminates

Investigation of structure–flexural response relations in thermoplastic carbon/glass fiber‐metal laminates

Experimental and Numerical Study on Mechanical Behavior of Steel/GFRP/CFRP Hybrid Structure under Bending Loading with Adhesive Bond Strength Assessment

Self‐resistance heating forming and performance analysis of Al/PEEK/CFRP laminates

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