Mechanical properties of the riveted connecting forming of CFRP plates

Okayasu, Mitsuhiro; Naito, Ryo

doi:10.1007/s12289-017-1344-9

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…But its biggest disadvantage is the local stress concentration around the hole, leading to the mechanical properties decline. [ 20 ] As one of the main ways of mechanical joining, bolt joining is widely used because of its advantages of easy disassembly inspection, easy maintenance and replacement, and good interchangeability. [ 21 ] Schematic diagram of bolt joining structure is illustrated in Figure 4.…”

Section: Mechanical Joiningmentioning

confidence: 99%

Joining processes of CFRP‐Al sheets in automobile lightweighting technologies: A review

Han

Guang

et al. 2022

Polymer Composites

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According to the development trend of modern car body, the future car body will be composed of steel, aluminum‐magnesium alloy, plastic, carbon fiber reinforced polymer (CFRP), and other lightweight materials. Hybrid material body represents the latest development trend of car body structure in the future. With the development of lightweight technology, the application of carbon fiber composite material in automobile bodies is increasing due to its exceptional performance. Therefore, the joining of carbon fiber sheets with dissimilar sheets process in the hybrid material body is a key technical problem that needs to be solved. In this paper, the existing joining processes of adhesive process, mechanical joining, welding process, and hybrid joining for carbon fiber composites are reviewed; the principle, development, advantages, and shortcomings of each process for carbon fiber composites joining processes are systematically described; and the latest progress of the joining process are introduced. The purpose is tantamount to broaden the application range of carbon fiber sheets with dissimilar sheets and provide reference for its extensive application in the development of hybrid car body and lightweight.

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Section: Mechanical Joiningmentioning

confidence: 99%

Joining processes of CFRP‐Al sheets in automobile lightweighting technologies: A review

Han

Guang

et al. 2022

Polymer Composites

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“…Because the FRP consists of multi-layer fibers, it is apt to fracture around the joint by using mechanical connection method, which causes serious disruption to the substrate due to extension of these cracks. 4,5 Adhesive bonding can provide fairly even stress distribution without damaging the carbon fiber in reinforced plastics. 6 Nevertheless, aging-resistant performance of the adhesive joints is not sufficient, 7,8 and this technology has high technical requirements for the actual processing process, environment, and operator.…”

Section: Introductionmentioning

confidence: 99%

Effect of plasma treatment parameters on the interfacial joining strength of overmolded hybrid fiber reinforced thermoplastic composites

Zhai

Liu

et al. 2022

J of Applied Polymer Sci

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In this study, hybrid fiber reinforced thermoplastic composites (hybrid thermoplastic composites) with high interfacial joining strength were fabricated using a plasma treatment strategy and injection overmolding technique. A series of experimental investigations were carried out to ascertain the effects of various plasma treatments on the interfacial joining strength of the overmolded hybrid composites. Test results reveal that compared with the untreated continuous fiber reinforced thermoplastic (CFRT) substrates, the surface roughness of the CFRT substrates treated by plasma with air for the 10 min-160 W set-up increases by 28.7%, the contact angle decreases by 50.5%, the silicon and fluorine are effectively removed, and the content of polar functional group increases remarkably, which bring about the increase of 24.76% of the interfacial shear strength of the overmolded hybrid composites. Further increase of plasma treatment time does not contribute to increase the interfacial shear strength of the overmolded hybrid composites. The interfacial shear strength at 60 W is 6.38% higher than that at 160 W, which is ascribed to the increase of the oxygen-containing functional group content. Compared with the air and nitrogen plasma treatment, the interfacial shear strength of the overmolded hybrid composites after oxygen plasma treatment reaches the maximum value.

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“…In our previous work, it has been clarified that the higher strength connection of unidirectional CFRP could be obtained for the rivet connection, compared to that for adhesive one. 13 The mechanical properties of unidirectional CFRP constitute are significantly important for the reliable design of CFRP structures. Thus, the purpose of this study was to systematically investigate the effects of machined circular holes on the mechanical properties of CFRP, using different numbers of multiple holes made in different formations.…”

Section: Introductionmentioning

confidence: 99%

Effects of machined circular holes on the mechanical properties of unidirectional carbon fiber-reinforced plastics

Okayasu

Naito

Fukuyama

et al. 2017

Journal of Composite Materials

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The effects of machined circular holes on the mechanical properties and failure characteristics of a unidirectional CFRP were investigated. Our approach was to change the location and the number of holes: (i) a two-set hole was machined with different modes: (A) parallel, (B) 45°and (C) a direction perpendicular to the loading direction; and (ii) multiple holes from n = 0 to 5 were made in the sample parallel to the loading direction. The higher tensile and higher fatigue strengths were obtained for the CFRP sample produced by mode A, compared to modes B and C. This was attributed to the different extend of the maximum stress and stress distribution, caused by the geometrical effects on the sample. The ultimate tensile strength (σUTS) of the sample was well predicted by the geometrical criterion. If the number of holes was increased from n = 0 to n = 2, the tensile strength decreased dramatically. However, the tensile strength did not strongly decrease further for samples with multiple holes from n = 2 to 5. The tensile strength is correlated with the maximum stress adjacent to the hole(s). Those stress values were verified by a 2D digital image correlation and a finite element analysis. Material failure of the CFRP during tensile loading was revealed by nondestructive testing using a piezoelectric ceramic, and debonding of the fibers occurred even at a low applied stress of approximately 35% σUTS.

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Mechanical properties of the riveted connecting forming of CFRP plates

Cited by 8 publications

References 11 publications

Joining processes of CFRP‐Al sheets in automobile lightweighting technologies: A review

Joining processes of CFRP‐Al sheets in automobile lightweighting technologies: A review

Effect of plasma treatment parameters on the interfacial joining strength of overmolded hybrid fiber reinforced thermoplastic composites

Effects of machined circular holes on the mechanical properties of unidirectional carbon fiber-reinforced plastics

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