scholarly journals Topological Design of a Lightweight Sandwich Aircraft Spoiler

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3225 ◽  
Author(s):  
Liu ◽  
Ou ◽  
He ◽  
Wen
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
High Performance ◽  
Lattice Structure ◽  
Weight Ratio ◽  
Bending Rigidity ◽  
Topological Design ◽  
Material Volume ◽  
3D Printing Technique

In this study, a lightweight sandwich aircraft spoiler (AS) with a high stiffness-to-weight ratio was designed. Excellent mechanical properties were achieved by the synthetic use of topology optimization (TO), lattice structure techniques, and high-performance materials, i.e., titanium alloy and aluminum alloy. TO was first utilized to optimize the traditional aircraft spoiler to search for the stiffest structure with a limited material volume, where titanium alloy and aluminum alloy were used for key joints and other parts of the AS, respectively. We then empirically replaced the fine features inside the optimized AS with 3D kagome lattices to support the shell, resulting in a lightweight sandwich AS. Numerical simulations were conducted to show that the designed sandwich AS exhibited good mechanical properties, e.g., high bending rigidity, with a reduction in weight by approximately 80% when compared with that of the initial design model. Finally, we fabricated the designed model with photosensitive resin using a 3D printing technique.

scholarly journals Designing a Sandwich Aircraft Spoiler with Lattice Structure Cores

2019 ◽  
Author(s):  
Haifeng Ou ◽  
Jie Liu ◽  
Junfeng He ◽  
Zufeng Pang ◽  
Yonghui Zhang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Lattice Structure ◽  
Volume Density ◽  
Service Environment ◽  
The Core ◽  
Photosensitive Resin ◽  
Printing Technique ◽  
Material Volume ◽  
3D Printing Technique

By combing continuum topology optimization (TO) method and lattice structure technique, a sandwich aircraft spoiler with a high stiffness-to-weight is designed. TO method is served to produce the shell of the aircraft spoiler and the lattice structure, used as cores, is employed to support the shell. TO problem is established as maximizing the stiffness of the structure with limited material volume. Density-based method is utilized to achieve a 0/1 solution. We then empirically replace the core of the aircraft spoiler by using 3D kagome lattice structure. Two different materials, i.e., aluminum alloy and titanium alloy, are synthetically applied to further reduce the weight and simultaneously improve the strength of the aircraft spoiler. Numerical simulations are conducted to show that the designed aircraft spoiler can meet the service environment with a reduction of its weight by approximately 80% when compared with that of the initial design model. Finally, we have fabricated the designed model with photosensitive resin by using 3D printing technique.

scholarly journals Mechanical Characterization of Rapid Solidified Alsicumg Alloys by New CRSS Casting Method Under T6 Condition

2019 ◽  
Vol 8 (12) ◽  
pp. 2897-2902
Keyword(s):  
Mechanical Properties ◽  
Manufacturing Process ◽  
High Performance ◽  
Weight Ratio ◽  
Solidification Process ◽  
Casting Process ◽  
Casting Method ◽  
Silicon Alloys ◽  
Hardness Tester

Aluminum-silicon alloys acquiring extensive industrial attention due to their superior resistance to rate of wear and elevated strength to weight ratio properties. Though the properties of the materials substantially depend on the manufacturing process they involve. Thus many industries focusing on new manufacturing methods to produce high-performance alloys. In this present study, AlSi (16-18) alloys were prepared by new CRSS (combined rheo stir squeeze) casting method with rapid-solidification process under T-6 condition. CRSS-T6 as casting process enhances the microstructural and mechanical properties significantly by 40-70%. Whereas, the maximum value of hardness (179.37) was found with AlSi17Cu3.5Mg0.8 with CRSS-T6. The improvements in hardness and elastic properties were mainly ascribed to size, distribution, and morphology of Si-particles because of its manufacturing process. SEM, advanced metallurgical microstructure and EDS analysis techniques are used for the surface morphologies observation. Moreover, Brinell hardness tester and Tensometer are used for the characterization of mechanical properties

Roundness in Drilling of Low-Rigidity Workpiece

2017 ◽  
Vol 749 ◽  
pp. 46-51
Author(s):  
Masahiko Sato ◽  
Akihiro Fukuma ◽  
Kanae Yamamoto ◽  
Takashi Matsuno
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Stainless Steel ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Carbon Steel ◽  
Thrust Force ◽  
Longitudinal Direction ◽  
Roundness Error ◽  
Fixed End

This study described the effect of mechanical properties on the roundness of a drilled hole in the drilling of low-rigidity workpieces. A thin-thickness part workpiece model involving a beam plate structure fixed on both ends was used in the study. The effects of feed, workpiece length, distance from the fixed end to the drilling point, and mechanical properties of the workpiece on the roundness of the hole were investigated. The thrust force increased with feed and the roundness became worse with feed. The hole was enlarged in the longitudinal direction of the workpiece at the upper section of the hole. An increase in the workpiece length decreased the rigidity of the workpiece and deteriorated the roundness of the hole. The roundness error was extremely small when the drilling point was near the fixed end. Carbon steel, aluminum alloy, stainless steel, and titanium alloy were used as workpiece materials. The thrust force in the drilling of titanium alloy and stainless steel was considerably larger than that of the carbon steel and aluminum alloy. The roundness of the hole was worse in the drilling of titanium alloy and stainless steel than that in the drilling of carbon steel and aluminum alloy. Plastic deformation occurred in the workpieces made of titanium alloy and stainless steel, which is probably because the workpiece was yielded by the large thrust force. The value of the ratio of the thrust force in drilling to the Young’s modulus of the workpiece was used in evaluating the deflection of the workpiece and the roundness error of the hole in drilling.

Fabrication and mechanical properties of high-performance aluminum alloy

Rare Metals ◽  
2014 ◽  
Vol 33 (4) ◽  
pp. 400-403 ◽  
Author(s):  
Wei-Wei Yang ◽  
Zhi-Meng Guo ◽  
Hui-Qin Cao ◽  
Ji Luo ◽  
An-Ping Ye
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Performance

scholarly journals Microstructure and Mechanical Properties of AA7075 Aluminum Alloy Fabricated by Spark Plasma Sintering (SPS)

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 430
Author(s):  
Elder Soares ◽  
Nadège Bouchonneau ◽  
Elizeth Alves ◽  
Kleber Alves ◽  
Oscar Araújo Filho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Spark Plasma Sintering ◽  
Weight Ratio ◽  
Milled Powder ◽  
Uniaxial Pressure ◽  
Plasma Sintering ◽  
Technology Applications ◽  
Spark Plasma ◽  
Size And Morphology

AA7075 aluminum alloy is widely used for several high-technology applications for its high mechanical strength to weight ratio but is still the subject of several studies seeking a further increase in its mechanical properties. A commercial powder is used, either as-received or after ball-milling. Dense AA7075 samples are prepared in one step by Spark Plasma Sintering, at 550 °C with a holding time of 15 min and a uniaxial pressure of 100 MPa. No additional heat treatment is performed. Laser granulometry, X-ray diffraction and optical- and scanning electron microscopy show that both grain size and morphology are preserved in the dense samples, due to the relatively low temperature and short sintering time used. The samples prepared using the ball-milled powder exhibit both higher Vickers microhardness and transverse fracture strength values than those prepared using the raw powder, reflecting the finer microstructure.

Mechanical Properties of Amorphous Metal Honeycombs for Ballistic Applications

2009 ◽  
Author(s):  
Jay C. Hanan ◽  
Balaji Jayakumar ◽  
Advait Bhat
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
High Performance ◽  
Weight Ratio ◽  
Leading Edge ◽  
Amorphous Metal ◽  
Body Armor ◽  
Dynamic Resistance

Body armor technology continually improves in performance and endurance with the introduction of new designs and materials. Composite layered armor systems comprised of ceramics and fabric based materials are at the leading edge. Over the years, these systems have seen preference over their metal counterparts due to reduced weight. High performance polyethylene (Spectra, Dyneema), Aramids (Kevlar, Twaron, Zylon) and other composite materials, [1] have further improved dynamic resistance in body armor with reasonable strength-to-weight ratio.

Toughening of Epoxy Resin Modified with In Situ Polymerized Acrylate Copolymer

2014 ◽  
Vol 910 ◽  
pp. 70-73
Author(s):  
Tao Wang ◽  
Jun Wang ◽  
Bin Zhang
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
High Performance ◽  
In Situ Polymerization ◽  
Weight Ratio ◽  
Diglycidyl Ether ◽  
Resin System ◽  
Acrylate Copolymer ◽  
Modified Epoxy

P(BA-St), a good modifier for epoxy resin, was prepared by BA and St in situ polymerization. The modified resin system was based on diglycidyl ether of bisphenol and methyl tetrahydrophthalic anhydride, tris (dimethylaminomethyl) phenol. The influence of the copolymer on mechanical properties and thermal performance of the systems was studied. When 15 wt% of the BA/St with a weight ratio composition of 7.5/7.5 was added to epoxy, high performance modified epoxy resin was obtained.

Evaluation of Weldability of Titanium Alloy Ti-6Al-4V and Aluminum Alloy 6061 Produced by Electron Beam Welding

2016 ◽  
Vol 879 ◽  
pp. 714-719 ◽  
Author(s):  
Petr Havlík ◽  
Jan Kouřil ◽  
Rudolf Foret ◽  
Ivo Dlouhy ◽  
Norbert Enzinger ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Electron Beam Welding ◽  
Incident Beam ◽  
Intermetallic Phases ◽  
Ambient Atmosphere ◽  
Aluminum Alloy 6061 ◽  
Alloy 6061

Aluminum and titanium alloys are among the most important and the most frequently used construction materials due to their physical and mechanical properties. Especially in the automotive and aerospace industry these materials allow to reduce the weight of structure which leads to reducing fuel consumption and environment pollution. These materials are often used together which leads to problems with junction between these materials. In addition to the mechanical joints, there is an effort to produce quality welded joints. Series of works focused to welding of Al/Ti joints by conventional and nonconventional welding methods were published [1, 4, 5, 6, 7]. By reduction of dimensions of molten material is possible to reduce the amount of emerging intermetallic phases and welding defects. Electron beam welding appears as suitable method for welding Al/Ti joints because it allows production of very narrow welds. The benefit is also necessity to perform electron beam welding in vacuum which is required for decrease energy losses of incident beam and simultaneously prevents reaction of molten metal with ambient atmosphere. This paper is focused to determine of appropriate parameters for electron beam welding of heterogeneous welds of titanium alloy Ti-6Al-4V and aluminum alloy 6061. Metallographic evaluation, analysis of chemical and phase composition were performed on the test welds for purpose to describing present phases. On the selected welds was evaluated the influence of intermetallic phases on the mechanical properties. The obtained results will be used for further experiments focused to optimize the process of electron beam welding of Al/Ti alloys.

Sign in / Sign up

Export Citation Format

Share Document