Multi-scale structuring for thermoplastic-metal contour joints of hollow profiles

In contrast to common and classical joining technologies for composite/metal hybrid structures such as bonding and riveting, profile and contour joints offer a promising potential for novel lightweight hybrid structures. Contour joints with form locking elements on multiple scale levels enable to pass very high loads into rod- and tube-shaped fibre reinforced structures and promise high degrees of material utilization for the composite part. This paper demonstrates the advantage of multi-scale structured load introduction elements. First the intrinsic manufacturing process, whereas the thermoplastic tape braided preform is simultaneously consolidated and formed into the metallic load introduction element is shown. Numerical investigations on the macro- and generic microscale demonstrate the potential to trigger cohesive or adhesive failure by appropriate designed form locking elements. The extensive experimental investigation of meso-, macro- or combined-structured tubular specimen shows the beneficial effect of multi-scale structuring to increase the joining strength. Concluding advises for the contour joints’ design are given.

[1]  Jürgen Fleischer,et al.  Manufacturing of polygon fiber reinforced plastic profiles by rotational molding and intrinsic hybridization , 2015, Prod. Eng..

[2]  Thomas Fischer Der Pressverband als Krafteinleitungs-Element in Faser-Kunststoff-Verbund-Wellen , 2005 .

[3]  Hak-Sung Kim,et al.  Optimal design of the press fit joint for a hybrid aluminum/composite drive shaft , 2005 .

[4]  Cv Clemens Verhoosel,et al.  Numerical homogenization of cracking processes in thin fibre-epoxy layers , 2010 .

[5]  Jung-Ju Lee,et al.  Evaluation of mechanical interlock effect on adhesion strength of polymer–metal interfaces using micro-patterned surface topography , 2010 .

[6]  Markus Kastner,et al.  Microscale simulation of adhesive and cohesive failure in rough interfaces , 2017, 2108.08576.

[7]  Werner Hufenbach,et al.  Design and automated manufacturing of profiled composite driveshafts , 2014 .

[8]  Fabrizio Micari,et al.  Joining by plastic deformation , 2013 .

[9]  Mike Schlaich,et al.  Carbon Fiber Reinforced Polymer for Cable Structures—A Review , 2015 .

[10]  Isaac M Daniel,et al.  Elastic properties of composites with fiber waviness , 1996 .

[11]  D. Starikov,et al.  Enhancement of adhesive joint strength by laser surface modification , 2007 .

[12]  Maik Gude,et al.  Design of multi-scale-structured Al-CF/PA6 contour joints , 2016 .

[13]  Maik Gude,et al.  Intrinsic manufacture of hollow thermoplastic composite/metal structures , 2016 .

[14]  Zheng Wang,et al.  Influences of interface and surface pretreatment on the mechanical properties of metal-CFRP hybrid structures manufactured by resin transfer moulding , 2016 .

[15]  P. Camanho,et al.  Numerical Simulation of Mixed-Mode Progressive Delamination in Composite Materials , 2003 .

[16]  J. Lemaître A CONTINUOUS DAMAGE MECHANICS MODEL FOR DUCTILE FRACTURE , 1985 .