Advanced Design Problems in Aerospace Engineering, Delft, The Netherlands

Abstract

Following the conference 'Advanced Design Problems in Aerospace Engineering', which took place at the Ettore Majorana Centre for Scientific Culture (EMCSC) in Erice, Italy, this issue is presented by the Delft University of Technology, The Netherlands. Subject of the contribution of Delft Aerospace to this conference is the impact of new materials in future aeronautical vehicles.This special issue consists of five interrelated articles, Parts I to V. Each article deals with the potential of multi-disciplinary design. The first article introduces the multi-disciplinary design philosophy. The subsequent articles give examples of the potential that new materials, like fibre reinforced plastics, can offer to improve the design of a product (in our case an aircraft).Part II discusses two simple design problems: A tension loaded plate with stress concentrations and buckling of a composite plate.Part III to V focus on the integration of the acoustical insulation in an aircraft fuselage structure. Part III discusses the integration of acoustics and mechanics in a stiffened shell fuselage and Part IV in a sandwich fuselage. Part V deals with the application of a visco-elastic layer to improve the acoustical insulation of a stiffened shell fuselage.In the articles is focused on the integration of only the two design aspects, acoustics and mechanics. The goal of future research will be the integration of as many design aspects as possible into the fuselage structure.

Experimental optimization and static characterization of modified fiber metal laminates with integrated mechanical interlock bonding system for aerospace applications

“…Three GLARE configurations were considered in this study. The first consists of the hooks and ultrasonic bath cleaning as surface treatments, designated as “Modified GLARE.” The second configuration consists of grit blasting and AC‐130‐2 Sol‐Gel as surface treatments, designated as “Standard GLARE 1.” The third configuration consists of sulfuric acid anodizing and BR 127, a primer produced by Cytec commonly used in industry and in literature , as surface treatments, designated as “Standard GLARE 2.” Grit blasting and anodizing costs were estimated from external industrial sources , while the primers were estimated from raw material costs . The unit cost of each surface treatment was normalized as a percentage of the cost of the raw aluminum and glass prepreg required to assemble one test panel, and presented in Fig.…”

“…The second configuration consists of grit blasting and AC-130-2 Sol-Gel as surface treatments, designated as "Standard GLARE 1." The third configuration consists of sulfuric acid anodizing and BR 127, a primer produced by Cytec commonly used in industry and in literature [4][5][6], as surface treatments, designated as "Standard GLARE 2." Grit blasting and anodizing costs were estimated from external industrial sources [36], while the primers were estimated from raw material costs [35,37].…”

“…During the 1970s, a new fatigue‐resistant material known as fiber metal laminates (FMLs) was developed in a partnership between Delft University and Fokker Technologies . Consisting of thin alternating layers of metal and FRPs bonded together in a sandwich structure, FMLs combine the excellent fatigue resistance of composite materials with the damage resistance of metals .…”

Amino Group Bearing Organic–Inorganic Hybrid Materials for Joining Aluminum Alloys and Thermoplastic Fiber‐Reinforced Parts

“…The use of those material compounds allows different property combinations, such as a high specific stiffness and rigidity in combination with good damage tolerance behavior. Until now, mostly thermosetting hybrid laminates have been investigated and some have been used in industrial areas . In comparison with these materials, the application of thermoplastic matrices enables a different profile of requirements to be met.…”

Innovative hybrid laminates of aluminium alloy foils and fibre‐reinforced thermoplastic layers

“…In addition, hybrid laminates with continuous fibre-reinforced thermosetting plastic matrix layers and different light metals have been developed to improve the light-weight construction properties and the damage tolerance [3][4][5][6]. In regards to this, different studies are being conducted with the so called fibre metal laminate (FML) materials GLARE (glass fibre-reinforced plastics/aluminium foil laminate), ARALL (aramid-fibre-reinforced plastics/aluminium foil laminate), CARALL (carbon fibre-reinforced plastics/aluminium foil laminate) and TiGr (titanium-graphite laminate) [7][8][9][10][11][12][13][14].…”