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SEP 2018

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NEWS 57 CompositesWorld.com Welding Thermoplastics thus far is 5 mm. "We have demonstrated this, which is roughly the thickness you would have in structural components," Raynal observes. "For STELIA, we used the carbon fiber as the conductor with no metal in the interface, but now we are developing tech- nology to weld any fiber ā€” glass fiber, for example ā€” without a metal mesh as well. We don't add material at the interface yet can weld UD to woven and UD to UD, without problem," he claims. FIG. 4 Qualification for future airframes KVE Composites has developed a standardized induction welding setup to support process qualification at OEMs and Tier 1 suppliers (left), which produces single-lap shear coupons (above) as well as Lā€“ and T-stringers. Source | TPRC and KVE Composites Ultrasonic welding e third most common technique, ultrasonic welding is another technology with which GKN Fokker has logged significant experi- ence. e process uses a sonotrode to generate high-frequency (20-40 kHz) vibrations that cause frictional heat and melting at the weld surfaces. "is is good for spot welds," says Offringa, noting that for

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