Creep resistance of aluminium alloys for the next generation supersonic civil transport aircrafts

Pantelakis, Spiros; Kyrsanidi, An.K.; El-Magd, Essam; Dünnwald, J.; Barbaux, Y.; Pons, Georgina Arnó

doi:10.1016/s0167-8442(98)00064-0

Cited by 18 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hightemperature mechanical performance of the different composition cast and wrought Al alloys have been studied in depth and summarized. [29][30][31] Pantelakis et al [32] studied the long-term creep behavior of 30 different Al alloys of 2xxx, 6xxx, and 8xxx series. These alloys are mostly used in supersonic aircraft.…”

Section: Doi: 101002/adem202301303mentioning

confidence: 99%

High‐Temperature Creep Behavior of Selective‐Laser‐Melting‐Fabricated Lattice Structures Inspired from Euplectella Aspergillum

Sharma,

Hiremath

2023

Adv Eng Mater

View full text Add to dashboard Cite

The study uses the lattice‐like arrangement of Euplectella aspergillum to derive bionic grid‐stiffened structures in the form of thin tubes. The bionic tubes are 3D printed with AlSi10Mg alloy using a selective laser melting (SLM) process. High‐temperature creep behavior at 250 ◦C and stress (0.3‐0.7) times yield strength of the tubes is studied under uni‐axial constant compressive load. The effect of the stress level, temperature, and tube design on the creep performance and deformation behavior is studied. The creep performance of bio‐inspired tubes is compared with honeycomb lattice tubes. Results showed the dependence of creep life and creep rate on the design of the bionic tubes. E. aspergillum based thin tubes showed higher creep life and lower creep rate as compared to honeycomb based tubes at all stress levels. Also, the creep curves of lattice structures based thin tubes are different than the solid material, especially in the primary and tertiary regions. The fractography analysis showed higher creep life in E. aspergillum inspired thin tubes is due to the improvement in ductility at high temperature. The stress exponent value in the Mukherjee‐Bird‐Dorn equation shows that the mechanism of creep is diffusion. Results here showed that bio‐inspiration and additive manufacturing provide an opportunity to design and fabricate advanced iso‐grids structures. Such lattice‐based thin tubes can be used to form self‐stiffened structures in the hot section of aircraft and space vehicles where low weight, stiffness, strength, and damage tolerance are important.This article is protected by copyright. All rights reserved.

show abstract

Section: Doi: 101002/adem202301303mentioning

confidence: 99%

High‐Temperature Creep Behavior of Selective‐Laser‐Melting‐Fabricated Lattice Structures Inspired from Euplectella Aspergillum

Sharma,

Hiremath

2023

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

“…When flying at supersonic speeds, the outer surface of an aircraft has extremely high temperatures that can weaken the aircraft. For a cruise speed of Mach 1.6, the approximate maximum temperature is below 100 O C 34 , so materials that can withstand high temperatures are desirable. The weight and cost of a material is also a key consideration.…”

Section: Materials Selectionmentioning

confidence: 99%

Supersonic Bi-Directional Flying Wing, Part II: Conceptual Design of A High Speed Civil Transport

Espinal

Lee

Sposato

et al. 2010

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

View full text Add to dashboard Cite

This report designs a supersonic passenger transport using a novel supersonic bi-directional (SBiDir) flying wing (FW) concept that achieves low sonic boom, low wave drag, and high subsonic performance. For supersonic flight, the planform is designed to achieve optimum aspect ratio, span, and sweep angle to minimize wave drag. For subsonic mode, the airplane will be rotated 90° so that the side of the airplane during supersonic flight becomes the front of the airplane. The sweep angle of the LE at subsonic mode is significantly reduced and the aspect ratio is considerably increased by (L/b) 2 where L is the airplane length, and b is the span. This will allow the airplane to have high subsonic performance with short takeoff and landing distance and low stall velocity due to low wing loading. The airfoil suggested is symmetric about the 50% chord location with both sharp leading edge (LE) and sharp trailing edge (TE). The whole 3-D configuration is symmetric about the longitudinal and lateral planes. As the demonstration of concept, the AOA=0° is selected as the low boom design point. A flat pressure surface of the airfoil used as the isentropic compression surface is employed to cancel the downward shock and sonic boom. Diminished take off noise will be achieved by attaining a low stall velocity and mounting the engines on the upper part of the airplane in order to shield the jet noise. A novel LE radial air injection to delay LE stall is suggested to avoid using the conventional LE slats system, which is heavy and complicated. The calculation shows that the 90° rotation can be done in 3 to 5 seconds with a very small centrifugal acceleration. The rotation transitional time will be short enough not to lose lift and the acceleration is so small that no passenger discomfort will be created. This design has the mission requirements of a cruise f Mach 1.6, a range of 2,000 nautical miles, a payload of 70 passengers and a takeoff field length of 2,471 feet. 1 The sonic boom overpressure propagated to ground was found to be 0.3 psf at AOA=0°.

show abstract

“…Hence, more stringent requirements on the ultra‐high temperature structural materials have been introduced to the relative components. A large number of materials have been used as high‐temperature structural materials, such as nickel‐based, cobalt‐based, and aluminum‐based alloys . However, nickel‐based and cobalt‐based superalloy materials used in gas turbine engines are no longer wholly satisfactory.…”

Section: Introductionmentioning

confidence: 99%

Structural, Elastic, Mechanical and Electronic Properties of NbW‐Based Intermetallic Compounds: First‐Principles Calculations

Zhu

Qin

Liu

et al. 2019

Physica Status Solidi (b)

View full text Add to dashboard Cite

The structural, elastic and electronic properties of NbW‐based intermetallic compounds have been investigated by first‐principles calculations from CASTEP code based on density functional theory (DFT). The calculated lattice parameters of NbW‐based intermetallic compounds are in good agreement with the experimental values. The calculated elastic constants indicate that NbW, CNb0.8W0.2, Mo0.333Nb0.333W0.333, Nb0.33Ta0.33W0.34, Nb0.75Se2W0.25, and Nb2.25S6W0.75 have mechanically stable structures. The bulk modulus, shear modulus, Young's modulus, and Poisson's ratio are obtained. With the addition of Ta element, the ductility of NbW‐based alloys increases obviously. With the addition of non‐metallic elements, it can be decreased. Among the six compounds, Nb0.33Ta0.33W0.34 has the best plasticity and the stiffness of CNb0.8W0.2 is the highest. The results show that NbW, Mo0.333Nb0.333W0.333, Nb0.33Ta0.33W0.34, and Nb2.25S6W0.75 are ductile, and CNb0.8W0.2 as well as Nb0.75Se2W0.25 are brittle. Furthermore, all NbW‐based intermetallic compounds considered in this work are conductors.

show abstract

Creep resistance of aluminium alloys for the next generation supersonic civil transport aircrafts

Cited by 18 publications

References 8 publications

High‐Temperature Creep Behavior of Selective‐Laser‐Melting‐Fabricated Lattice Structures Inspired from Euplectella Aspergillum

High‐Temperature Creep Behavior of Selective‐Laser‐Melting‐Fabricated Lattice Structures Inspired from Euplectella Aspergillum

Supersonic Bi-Directional Flying Wing, Part II: Conceptual Design of A High Speed Civil Transport

Structural, Elastic, Mechanical and Electronic Properties of NbW‐Based Intermetallic Compounds: First‐Principles Calculations

Contact Info

Product

Resources

About