Recent Developments for Laser Beam Joining of CFRP-aluminum Structures

Woizeschke, Peer; Wottschel, Vitalij

doi:10.1016/j.mspro.2013.02.031

Cited by 17 publications

(11 citation statements)

References 5 publications

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“…The damage value at the neck decreased to 1.00 when the punch corner radius was increased from 0.3 to 0.7 mm, as shown in Figure 11(b). However, increasing results in a decrease in the punch volume and eventually a decrease in the undercut, according to (3). Therefore, a slight undercut of 0.002 mm was formed.…”

Section: Influence Of Punch Corner Radius On the Geometrical Interlocmentioning

confidence: 98%

“…Use of carbon fiber-reinforced plastic (CFRP) laminates has especially increased in the automotive industry owing to their low density and good mechanical properties [1][2][3]. However, the joining of dissimilar materials, such as CFRP laminates with other materials, is still one of the main issues that must be resolved for successful multimaterial design.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Lee

et al. 2014

Advances in Mechanical Engineering

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Carbon fiber-reinforced plastic (CFRP) is a lightweight material that can potentially replace structural steel components in automobiles. The hole-clinching process is a mechanical clinching technique for joining brittle or low-ductility materials, such as CFRP, with ductile materials. In this study, the influence of tool shape on the hole-clinching process for CFRP and SPRC440 was investigated using FE-analysis and experiments. The parameters of the tool shape investigated were the punch corner radius and the punch diameter. The geometrical interlocking shapes of hole-clinched joints were characterized by neck thickness and undercut. Based on the desired joint strength of 2.5 kN, hole-clinching tools were designed on the basis of the relationship between joint strength and geometrical interlocking. FE-analysis and hole-clinching experiments were performed with the designed holeclinching tools to investigate the geometrical interlocking shape as well as joinability, including neck fracture, undercut, and hole expansion, resulting from changes in tool parameters. Joint strength was evaluated to verify the effectiveness of hole clinching by a single lap shear test.

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Section: Influence Of Punch Corner Radius On the Geometrical Interlocmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Lee

et al. 2014

Advances in Mechanical Engineering

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“…There is no study on direct diffusion bonding between aluminium alloys and CFRPs, though researchers have used wires (titanium), foils (titanium) and fibres (glass fibre) between aluminium and CFRPs as transition elements in the course of diffusion bonding [67][68][69][70]. In these cases, one side of titanium wire or foil was diffused to aluminium while the other was holding CFRPs.…”

Section: Diffusion Bondingmentioning

confidence: 99%

Joining of carbon fibre reinforced polymer (CFRP) composites and aluminium alloys – A review

Pramanik

Basak

Dong

et al. 2017

Composites Part A: Applied Science and Manufacturing

479

147

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This paper investigates comprehensive knowledge regarding joining CFRP and aluminium alloys in available literature in terms of available methods, bonding processing and mechanism and properties. The methods employed comprise the use of adhesive, self-piercing rivet, bolt, clinching and welding to join only CFRP and aluminium alloys. The non-thermal joining methods received great attention though the welding process has high potential in joining these materials. Except adhesive bonding and welding, other joining methods require the penetration of metallic pins through joining parts and therefore, surface preparation is unimportant. No model is found to predict the properties of jointed structures, which makes it difficult to select one over another in applications. The choice of bonding methods depends primarily on the specific applications. The load-bearing mechanism of bolted joints is predominantly the friction that is the first stage resistance. Hybrid joints performance is enhanced by combining rivets, clinch or bolts with adhesives.

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“…aluminum-CFRP (carbon fiber-reinforced plastic) joining [7]. Thereby, the hybrid laminate merge into a pure metal laminate.…”

Section: Introductionmentioning

confidence: 99%

“…Thereby, the hybrid laminate merge into a pure metal laminate. The risk of partial existence of polymeric residues within this metal laminate requires a previous seal welding [7].…”

Section: Introductionmentioning

confidence: 99%

Decreasing pore formation in multiple-sheet laser joining with interfacial polymeric contaminations

2015

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Deep-penetration laser welding is an efficient joining technology for overlap joints nowadays. However, contaminations usually having a lower vaporization temperature can cause seam defects like pores and melt ejections during the process. Many approaches have been investigated, e.g., for the industrially interesting case of welding zinc-coated steel sheets. Suitable techniques for sufficient reduction or avoidance of porosity require additional process steps or timeconsuming preparations. In this paper, three-sheet joints having polymeric interlayers as exemplary extensive contaminations are investigated. Seams feature extreme porosity after standard single-pass welding. The porosity can be decreased significantly when repeating the welding process (double-pass welding). This effect on formation of porosity is modified in this paper. Instead of two processes, longitudinal beam oscillation is applied. The center porosity in longitudinal sections, used as indicator for the porosity of seams, can be reduced significantly from more than 50 to 20 % by using the beam oscillation technique. As the main reason, the increased degassing time due to the lengthening of the melt pool depending on oscillation parameters is identified. Simultaneously, the results indicate that the seam width must not increase similarly to avoid that further evaporation of contamination material cancels out the achieved benefit by lengthening.

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Recent Developments for Laser Beam Joining of CFRP-aluminum Structures

Cited by 17 publications

References 5 publications

Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Influence of Tool Shape on Hole Clinching for Carbon Fiber-Reinforced Plastic and SPRC440

Joining of carbon fibre reinforced polymer (CFRP) composites and aluminium alloys – A review

Decreasing pore formation in multiple-sheet laser joining with interfacial polymeric contaminations

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