The demand for safer, lighter and more fuel efficient vehicles has led to the market entry of light weight construction, with the use of advanced high strength steels, engineering plastic and light weight metals. Maximum weight savings potential will be limited if these are used in isolation. Chemistry based structural adhesives and foams enable the intelligent use of all three weight saving methodologies to overcome the problems of safety, quality and high processing cost.
Zunächst konnte eine ständige Verfügbarkeit von Maltose über die gesamte Prozessdauer mit einer Regelung im geschlossenen Regelkreis mit dem pH-Wert als Regelgröûe gewährleistet werden. Es wurden 3 Methoden zur Integration getestet: (1) direkte Zugabe eines Adsorptionsharzes in den Reaktor, (2) Anschluû eines Festbettreaktors zur Adsorption von Gallidermin und (3) die räumliche Trennung von Produktion und Adsorption mittels Mikrofiltration. Mit allen 3 Methoden konnte sowohl die Gallidermin-Konzentration als auch die Raum-Zeit-Ausbeute verbessert werden. Bezogen auf das Mikrofiltrationsverfahren wurde die Gallidermin Konzentration auf 840 mg L ±1 um den Faktor 2,4 und die Raum-Zeit-Ausbeute auf 23,3 mg L ±1 h ±1 um den Faktor 1,8 gesteigert werden.
Abstract. Structural adhesively bonded and spot welded structures in a car body will experience cyclic loading resulting in degradation, especially in energy absorption performance of welded terms. This paper is focused on the degradation of adhesively bonded and weld-bonded box beams versus equivalent spot welded samples. In the first part of this paper, results from the experimental testing of box beams with different joint methods under cyclic torque are presented. The torsional stiffness of box beams is shown to degrade and box beams with different joint methods show different performance. In the second part, 3-point bending crash test results show the different performance of energy absorption with different joint methods. Bonded and weld-bonded box beams with toughened structural adhesive maintain energy absorption performance compared to the original level, while spot welded profiles show a significant decrease.
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