Development of novel form-locked joints for textile reinforced thermoplastices and metallic components

Gude, Μaik; Hufenbach, W.; Kupfer, Robert; Freund, Andreas; Vogel, Christian

doi:10.1016/j.jmatprotec.2014.09.007

Cited by 40 publications

(43 citation statements)

References 9 publications

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“…For the detailed investigation of the dependencies between process and design parameters and their effects on the qualitative formation of the joining zone, parameter studies were carried out with initial tests [14,15]. Based on that, further joining tests were performed with a developed thermoclinching system on exemplary materials using thermoplastic composite sheets made of glass fibre reinforced polypropylene (GF/PP) in combination with prepunched steel sheets as joining partners, Table 1.…”

Section: Experimental Analysesmentioning

confidence: 99%

“…The in-depth investigations carried out on process control show that the temperature control of the heating area has a significant influence on the qualitative formation of the head area [14]. In order to determine an adequate process temperature, thermal analyses such as differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were conducted on the chosen composite materials.…”

Section: Process-specific Parametersmentioning

confidence: 99%

“…During the forming process, a horizontal deformation of rovings on the top side of the composite was observed due to the pin geometry. As a result these rovings cannot be formed completely into the head area of the joint [14,15]. In order to investigate this form- ing phenomenon in detail, partial forming operations with different joining tool geometries were carried out to determine their influence on the forming process and the fibre position in the joining zone, Figure 6a.…”

Section: Geometric Parametersmentioning

confidence: 99%

“…For the loading tests with predominantly quasi-static tensile shear and cross tension loads, test specimens were manufactured in accordance to the respective standards DIN EN ISO 14273 and DIN EN ISO 14272 with different cut orientations and varying dimensions in the head and neck area [19][20][21]. Initial tensile shear tests on single overlapped specimens have already shown that the thermoclinched joints exhibit different mechanical properties and characteristic failure behaviour, particularly depending on the geometric sizes [14]. Thus, test specimens with biaxial reinforced joining partners show clear differences in the load-bearing and failure behaviour concerning the variation of the ratio of pre-hole diameter to pin diameter d b /d p , Figure 14.…”

Section: Load Bearing Behaviourmentioning

confidence: 99%

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Simulation‐aided development of a robust thermoclinching joining process for hybrid structures with textile reinforced thermoplastic composites and metallic components

Gude

Vogel

Gröger

2019

Materialwissenschaft Werkst

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In order to take advantage of the specific structural and functional properties inside a multi-material assembly, it is necessary to provide adapted joining technologies. Therefore, the new joining technology "thermoclinching" was developed to join endless fiber reinforced thermoplastic composites and metallic joining partners. Previous experimental and numerical studies demonstrated the potential of the novel joining technology. In experimental and numerical studies essential geometrical and material parameters influencing the forming behavior are identified and evaluated. Thereby, the inline-thermoclinching technology is developed by integrating the pre-processed steps of cutting and heating into the actual joining process. For structural analysis of the joining zone as well as for quality analysis and validation of the process simulations computer tomography (CT) is used. Furthermore, experimental characterizations of the failure behavior of thermoclinched joints and the development of simulation models as well as strategies for numerical strength analyses are carried out. Keywords:Clinching / hybrid structure / multi-material / joint / process simulation Zur effizienten Nutzung der spezifischen Eigenschaften innerhalb einer Multimaterial-Baugruppe ist die Bereitstellung angepasster Fügetechnologien zwingend erforderlich. Vor diesem Hintergrund wurde die Thermoclinch-Technologie entwickelt, um endlosfaserverstärkte thermoplastische Verbundwerkstoffe und metallische Fügepartner zu verbinden. Erste Studien verdeutlichen das Potenzial der neuartigen Fügetechnologie; jedoch sind detailliertere Untersuchungen zur Bereitstellung eines robusten Thermoclinch-Prozesses erforderlich. In systematischen experimentellen und numerischen Parameterstudien werden wesentliche Einflussgrößen auf das Umformverhalten identifiziert und bewertet. Dabei wird die Prozessintegration von Einschnitt-, Aufheiz-und Fügeoperation als Grundlage eines robusten Inline-Thermoclinch-Prozesses vorgenommen. Für die Strukturana-

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Section: Experimental Analysesmentioning

confidence: 99%

Section: Process-specific Parametersmentioning

confidence: 99%

Section: Geometric Parametersmentioning

confidence: 99%

Section: Load Bearing Behaviourmentioning

confidence: 99%

See 2 more Smart Citations

Simulation‐aided development of a robust thermoclinching joining process for hybrid structures with textile reinforced thermoplastic composites and metallic components

Gude

Vogel

Gröger

2019

Materialwissenschaft Werkst

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“…However, the proper mechanically clinched joints (made of the magnesium alloys) are produced under elevated temperature conditions, when the process temperature reaches about 220 °C [10,11]. The scientific research and development continuously effort to apply the mechanical clinching for a wide range of materials, such as the textile-reinforced thermoplastics, or the carbon fiber reinforced polymers as a standard material suitable for this joining [12,13].…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Properties of Mechanically Clinched Joints Made of Ferrous and Non-Ferrous Materials

Kaščák¹,

Spišák²,

Kubík³

et al. 2018

Adv. Sci. Technol. Res. J.

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Nowadays, there are several reasons for the utilization of the sheets made of aluminum in the car body production. Besides decreasing the car body weight, there is a need to reduce fuel consumption of the vehicle as well as the environmental impact by lower production of emissions. Moreover, such reasons are mutually dependent or influence each other. The application of the aluminum sheets in hybrid car body production resulted in the need for innovative joining techniques, which could make it possible to successfully join sheets from aluminum alloys. Mechanical clinching is one of the new or innovative joining techniques, which belongs to cold-forming joining process, which makes it possible to join different kinds and thicknesses of sheets. Individual materials and thicknesses can be combined. The mechanically clinched joints are durable, and the joining process duration is very fast (duration of 1s) and does not have a distinctive impact on the environment; a protective layer of the sheets remains intact. The paper focuses on the evaluation of the properties of hybrid joints that were prepared by the single stroke clinching process with a rigid die. The hot-dip galvanized steel sheets DC06 and H220PD combined with the sheets from aluminum alloys EN AW 5754 (having different values of the hardness-H11, H22, and H24) and EN AW 6082 were used for joining. The results from experiments confirmed the mechanical clinching is the suitable technique for joining such combination of sheets. However, some considerations, such as the arrangement of the sheets about the punch and die, must be regarded.

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Staking of Polymer–Metal Hybrid Structures

Abibe

Amancio‐Filho

2017

Joining of Polymer‐Metal Hybrid Structures

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Development of novel form-locked joints for textile reinforced thermoplastices and metallic components

Cited by 40 publications

References 9 publications

Simulation‐aided development of a robust thermoclinching joining process for hybrid structures with textile reinforced thermoplastic composites and metallic components

Simulation‐aided development of a robust thermoclinching joining process for hybrid structures with textile reinforced thermoplastic composites and metallic components

The Evaluation of Properties of Mechanically Clinched Joints Made of Ferrous and Non-Ferrous Materials

Staking of Polymer–Metal Hybrid Structures

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