FricRiveting of Polyetherimide /AA 2024-T351 Hybrid Joints

Fig. 4

Fig. 9

Fig. 7

• Process Temperature:

- 0,5-0,95*Tm- Al 2024

- thermal degradation of PEI.

• Joint Performance:

- Tensile - 60-93% of RmRivet.

- Shear - 70% of RmPEI

(A)

Fig. 2: (A) Polymer matrix composite body panel bonded to steel frame in the Lamborghini Murciélago. (B) Volkswagen's 1L-car multi-material automotive concept.

Fig. 3: Example of FricRiveting potential applications

maxmax)(

32 V

HVrPQtotal ⋅

⋅

+

⋅⋅=

ηµ

maximum tangential speed( Vmax = ω . R )

kinematic friction coefficient

maxV

µ)(rP normal pressure distribution

polymer molten viscosity ηH avg. thickness of the molten layer

MicrostructureTemperature EvolutionMechanical PropertiesTensile Strength

Lap Shear Strength

Fig. 6

Fig. 1: Polymer-metal hybrid concepts of Airbus A350 and Boeing 787.

Prof. Dr.-Ing. Sergio Amancio, Helmholtz-Zentrum Geesthacht, Institute of Materials, Materials Mechanics, Solid State Joining Processes, Adv. Polymer-Metal Hybrid Structures

Motivation

Increased selection of polymer-metal hybrid structures in the transportation industry as a tool for weight reduction and decrease of nocive gas emission

FricRiveting – Principles of the Process

Analytical Heat Input ModelA new spot joining process for thermoplastics -

lightweight alloys multi-materials structures (GKSS patent: US11/602868).

Fig. 5

Properties of Polyetherimide (PEI) / AA 2024 Joints

Summary and ConclusionsBonding mechanisms by mechanical interference and adhesion between polymer and metalGood tensile and shear strength due to macrostructural & microstructural changes related to high process temperature and deformationFricRiveting as new, simple and fast alternative for joining advanced plastics to lightweight alloys

Fig. 8

Helmholtz-Zentrum Geesthacht • Max-Planck-Straße 1 • 21502 Geesthacht • Phone +49 (0)4152 87-2066 • Fax +49 (0)4152 87-2033 • www.hzg.deContact: Prof. Dr.-Ing. S. Amancio – sergio.amancio@hzg.de