The cover photo describing the crystal structure of Na5YSi4O12 with glass-ceramic Na+ superionic conductors. As discussed by Toshinori Okura, these glass-ceramic conductors have great potential and are one of the most important groups of solid electrolytes, not only because of its practical usefulness for advanced batteries but also for its three-dimensional ionic conducting nature.
Chances and challenges in the application of fiber metal laminates
Daniel Stefaniak*, Robert Prussak
Institute of Composite Structures and Adaptive Systems, German Aerospace Center (DLR), Lilienthalplatz 7, 38108 Braunschweig, Germany
Adv. Mater. Lett., 2019, 10 (2), pp 91-97
Publication Date (Web): Dec 19, 2018
Copyright © 2018 VBRI Press
Fiber-metal laminates (FML) as a combination of metals and fiber reinforced plastic materials are investigated in a variety of current research projects. The intention of combining these two different materials is the compensation of their inherent weaknesses. Certain key parameters for the selection of the constituents of an FML are discussed based on different applications and the related challenges. Therefore, different applications using FML in current research projects at German Aerospace Center are discussed and requirements are deduced. The applications cover UD-CFRP steel laminates, local metal hybridization as well as the use for impact and crash prone structures. The specific challenges in the use of these hybrid laminates like manufacturing and residual stresses are then discussed in more detail as they should also be taken into account when selecting the constituents of an FML for a certain application.
Fiber metal laminate, FML, fiber reinforced plastic, residual stress, fiber bragg grating sensors.