scholarly journals Examination on Mechanical Behavior and Drilling Analysis of Fiber Metal Laminates

2019 ◽  
Vol 9 (1S4) ◽  
pp. 881-885
Keyword(s):  
Mechanical Behavior ◽  
Optical Microscope ◽  
Drill Bit ◽  
Compression Moulding ◽  
Fiber Metal Laminates ◽  
Aerospace Applications ◽  
Before And After ◽  
New Type ◽  
Fiber Metal ◽  
Aluminium Sheets

Fiber Metal Laminates (FML) are a class of composites that are recently employed to substitute sole metals in various applications like aerospace applications. In this investigation, a new type of FML was successfully fabricated using compression moulding in which Aluminium and ceramics mat are stacked in the presence of epoxy resin. To improve the bonding by ensuring the flow of resin through the laminates, drilling with various pattern on the Aluminium sheet and ceramic mat were performed before subjected to compression to form FML. Aluminium sheets with Zig-zag pattern performed in a better way due to the improvements in bonding. In addition, drilling operation was done on the FML to ensure the de-lamination resistance and machinability. The drill bit before and after drilling was inspected by using optical microscope to understand the machinability behaviour of the FML.

scholarly journals The residual stress characteristics and mechanical behavior of shot peened fiber metal laminates based on the aluminium-lithium alloy

2020 ◽  
Vol 254 ◽  
pp. 112858
Author(s):  
Huaguan Li ◽  
Hao Wang ◽  
René Alderliesten ◽  
Junxian Xiang ◽  
Yanyan Lin ◽  
...  
Keyword(s):  
Residual Stress ◽  
Mechanical Behavior ◽  
Fiber Metal Laminates ◽  
Lithium Alloy ◽  
Fiber Metal

scholarly journals Automated, Quality Assured and High Volume Oriented Production of Fiber Metal Laminates (FML) for the Next Generation of Passenger Aircraft Fuselage Shells

2019 ◽  
Vol 26 (1) ◽  
pp. 502-508 ◽  
Author(s):  
Hakan Ucan ◽  
Joachim Scheller ◽  
Chinh Nguyen ◽  
Dorothea Nieberl ◽  
Thomas Beumler ◽  
...  
Keyword(s):  
Research Work ◽  
Research Programme ◽  
High Volume ◽  
Next Generation ◽  
New Production ◽  
Fiber Metal Laminates ◽  
Production Chain ◽  
Joint Project ◽  
Aerospace Applications ◽  
Fiber Metal

AbstractThe use of fiber-metal laminates (FML) allows for substantial advantages over a fuselage skin made of monolithic aluminum materials. Glass fiber prepreg reinforced aluminium is characterized by high damage tolerance capabilities, supporting the structural strength capability in case of any kind of damage. For this reason, FML, and GLARE in particular, have been identified as superior materials for aerospace applications. More than 400m2 FML is applied on each A380, as skin panels and as D-noses for both, vertical and horizontal stabilizer. FML possess the potential to become the baseline material for next-generation single-aisle aircrafts [1, 2, 6].The development of a new production chain that will allow automated fuselage production for future short-haul aircrafts is the focus of the studies that make up the joint project AUTOGLARE. As part of the fifth call-up for the German Aeronautical Research Programme (LuFo), the German Aerospace Center (DLR) is working with its project partners Airbus Operations, Premium Aerotech (PAG) and the Fraunhofer Gesellschaft (FhG). The development of a production chain for stiffened fuselage panels made of Fiber metal Laminates should support a production rate of 60 aircraft per month [3].This study contains the research work of the DLR and FhG regarding the automated and quality assured process for chain stiffened FML fuselages. In addition to a detailed explanation of the systems that were set up, this paper covers the planned tests, the completed demonstration models and the findings derived from them.

Tensile mechanical behavior and failure mechanisms of fiber metal laminates under various temperature environments

2022 ◽  
pp. 115142
Author(s):  
Lu Yao ◽  
Shaofeng Zhang ◽  
Xiaojian Cao ◽  
Zhenyuan Gu ◽  
Changzi Wang ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Failure Mechanisms ◽  
Fiber Metal Laminates ◽  
Fiber Metal

Forming and drilling of fiber metal laminates – A review

2018 ◽  
Vol 37 (14) ◽  
pp. 981-990 ◽  
Author(s):  
M Thirukumaran ◽  
I Siva ◽  
JT Winowlin Jappes ◽  
V Manikandan
Keyword(s):  
Process Parameters ◽  
Failure Modes ◽  
Machining Parameters ◽  
Fiber Metal Laminates ◽  
Aerospace Applications ◽  
Fiber Metal ◽  
Process Combination ◽  
Joining Process ◽  
Quality Production

In aviation industries, most of the stiffened structural components are manufactured by forming and laminating process. Combination of several conventional manufacturing processes is required in modern industries in hybrid laminate production. Fiber metal laminates undergo various joining process during assembly of aero-structures. Among them, forming and drilling are often required during assembly. Understanding the significance of various process parameters enables quality production and assembly of fiber metal laminates structures. Many researchers explored the cause and effect of few parameters and mechanisms which significantly alter the quality of form and drill. This review describes the progress in forming and drilling of fiber metal laminates for aerospace applications. Especially towards the process parameters, defects and their causes along with the preferred solutions recommended by the researcher society in forming and drilling processes. Numerous factors have controlled the quality of forming and drilling processes. Due to the machining parameters, different failure modes will occur in different layup of the laminates. To overcome the failures in machining/forming of fiber metal laminates, choosing the optimum parameter for the selection based procedure is needed to improve quality of fiber metal laminates.

scholarly journals Effect of Alloying Additions of Aluminium and Iron on the Creep Resistance of Ti-12Cr (wt.%)

2019 ◽  
Author(s):  
H. Chakravarty ◽  
J. Ballor ◽  
C.J. Boehlert
Keyword(s):  
Thermomechanical Processing ◽  
Optical Microscope ◽  
Creep Tests ◽  
Creep Properties ◽  
Aerospace Applications ◽  
Ti Alloys ◽  
Beta Titanium ◽  
Before And After ◽  
Metastable Beta ◽  
Applied Stresses

Abstract Titanium (Ti) and its alloys are among the desired materials for biomaterial, marine, and aerospace applications due to their excellent properties. Metastable beta titanium (β-Ti) alloys exhibit enhanced strengths and hardness values after thermomechanical processing (TMP) due to the presence of omega (ω) and alpha (α) phase precipitates in the beta (β) matrix. In this study, the creep properties of three different β-Ti alloys, Ti-12Cr-1Fe-3Al (wt. %), Ti-12Cr-3Al (wt. %), and T- 12Cr (wt. %), were experimentally obtained at different applied stresses and at 683 K. The relationship between microstructure and creep properties was investigated. X-ray diffractometer (XRD), optical microscope (OM), and scanning electron microscope (SEM) were used to help characterize the microstructure before and after creep deformation. The hardness of alloys increased after heat treatment for 48 hrs at 410 ºC due to the precipitation of the α and ω phases. The creep tests showed that Ti-12Cr-1Fe-3Al (wt. %) was the most creep resistant and Ti-12Cr (wt. %) was the least creep resistant.

Effects of applying a combination of surface treatments on the mechanical behavior of basalt fiber metal laminates

2019 ◽  
Vol 92 ◽  
pp. 133-141 ◽  
Author(s):  
M. Emami Mehr ◽  
H. Aghamohammadi ◽  
S.N. Hosseini Abbandanak ◽  
Gh R. Aghamirzadeh ◽  
R. Eslami-Farsani ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Basalt Fiber ◽  
Surface Treatments ◽  
Fiber Metal Laminates ◽  
Fiber Metal
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