Development of a rivet geometry for solid self-piercing riveting of thermally loaded CFRP-metal joints in automotive construction

Vorderbrüggen, Julian; Köhler, Daniel; Grüber, Bernd; Troschitz, Juliane; Gude, Μaik; Meschut, Gerson

doi:10.1016/j.compstruct.2022.115583

Cited by 22 publications

(3 citation statements)

References 37 publications

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“…It is also possible to completely simplify the shape of the die and use a special blank holder in the process of pressing the rivet into the joined materials [26]. Another method of joining using a full rivet was presented in works [27][28][29][30]. To join layers of different materials, a high-hardness rivet was used.…”

Section: Introductionmentioning

confidence: 99%

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

Boda,

Mucha,

Witkowski

2024

Materials

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This paper presents the possibility of forming a pressed joint between two 1.5 mm thick sheets made of HX340 steel. The joint was formed using an additional deformable steel rivet with a hardness of 400HV1. Different distances of rivet pressing below the initial surface of the upper sheet were chosen: 0, 0.15, 0.30, 0.45 and 0.60 (in mm). For the mentioned rivet-pressing distances, forming tests were performed using an “SKB” die with three die depths: 1.45, 1.60 and 1.75 (in mm). Observations and measurements of the characteristic geometric dimensions of the interlock were made. Furthermore, the strength of the clinch-riveted joints was analysed. Changing the depth of the die by 20%, i.e., from hd = 1.45 mm to hd = 1.75 mm for the same rivet press-in depth (of = 0%), resulted in a 12% reduction in the forming-force value. The maximum load capacity of the joint in the shear test decreased by 3.5% for the mentioned joint variant. The greater the rivet press-in depth used in the joint (of), the greater the value of the interlock size (tu). Increasing the value of rivet-pressing depth below the initial surface of the upper sheet from 0 mm to 0.6 mm resulted in an increase in the size of the interlock (tu) by 136% (for hd = 1.45 mm), by 128% (for hd = 1.60 mm) and by 85% (for hd = 1.75 mm).

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Section: Introductionmentioning

confidence: 99%

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

Boda,

Mucha,

Witkowski

2024

Materials

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“…There are an increasing number of industrial applications that involve the joining of composite elements using the above-mentioned pressure joining techniques [41,45]. The joining of a composite and a metal using a punching rivet and heating to 180 • C was presented, for example, in [46]. If the lower layer is less plastic and the upper layer is more plastic, it is possible to connect them through clinching, where a hole is made in the lower layer for two sheets [47] or even three sheets [48].…”

Section: Introductionmentioning

confidence: 99%

Steel Sheet Deformation in Clinch-Riveting Joining Process

Witkowski,

Mucha,

Boda

2024

Metals

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This paper presents the deformation of a joined sheet after the clinch riveting process. The DX51D steel sheet with zinc coating was used. The samples to be joined with clinch riveting technology had a thickness of 1 ± 0.05 mm and 1.5 ± 0.1 mm. The sheet deformation was measured before and after the joining process. The rivet was pressed in the sheets with the same dimension between the rivet axis and three sheet edges: 20, 30, and 40 mm. For fixed segments of the die, from the rivet side close to the rivet, the sheet deformation was greater than that of the area with movable segments. The movement of the die’s sliding element caused more sheet material to flow in the space between the fixed part of the die and movable segments. Hence, the sheet deformation in these places was smaller than for the die’s fixed element—the sheet material was less compressed. For sheet thickness values of 1.5 mm and a width value of 20 mm, the bulk of the sheet was observed. For a sheet width of 20 mm, it was observed that the deformation of the upper and lower sheets in the area of the rivet was greater than for sheet width values of 30 or 40 mm.

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“…In recent years, carbon-fibre-reinforced polymers (CFRPs) have been increasingly used and are replacing components made of metallic alloys. Due to their high specific strength, high specific stress, lightweight nature [ 1 ] and ease of processing, CFRPs are widely used in the automotive [ 2 ], aerospace [ 3 ] and marine [ 4 ] fields, and as components in wind turbines [ 5 ]. To achieve the required properties of CFRPs, thermoset resins are used as a matrix for structural components and epoxy resin is the one that is used most frequently.…”

Section: Introductionmentioning

confidence: 99%

Introduction of SWCNTs as a Method of Improvement of Electrical and Mechanical Properties of CFRPs Based on Thermoplastic Acrylic Resin

et al. 2023

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The aim of this research was to improve the electrical and mechanical properties of carbon-fibre-reinforced polymers (CFRP) based on thermoplastic acrylic resin ELIUM®, by introducing single-walled carbon nanotubes (SWCNTs) into their structure. The laminates were fabricated using the infusion technique of infiltrating the carbon fabric with the mixture of acrylic resin and SWCNTs. The addition of SWCNTs improved the electrical conductivity through the thickness of the laminate by several times compared to the laminate without modification. No defects or voids were observed in the structure of the fabricated nanocomposites. The introduction of SWCNTs into the CFRP structure increased the Young’s modulus, interlaminar shear strength and impact resistance. DMA analysis showed almost no change in the glass transition temperature of the fabricated SWCNT/CFRP nanocomposites compared to the reference laminate.

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Development of a rivet geometry for solid self-piercing riveting of thermally loaded CFRP-metal joints in automotive construction

Cited by 22 publications

References 37 publications

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

Steel Sheet Deformation in Clinch-Riveting Joining Process

Introduction of SWCNTs as a Method of Improvement of Electrical and Mechanical Properties of CFRPs Based on Thermoplastic Acrylic Resin

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