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aircraft bearings

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270095
EISBN: 978-1-62708-301-0
... Abstract A pair of bearings mounted side by side in an aircraft engine failed in service. Photographs show that the inner rings were either broken or deformed, the balls were worn and flattened, and the cages severely damaged. The bearing races were damaged as well, but only on one side...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270097
EISBN: 978-1-62708-301-0
... that excessive clearance allowed the outer bearing races to rotate, thus removing material from adjacent contact surfaces and accelerating the buildup of metal particles in the engine oil. The chapter recommends several design changes to remedy the problem. aircraft bearings oil analysis visual...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270072
EISBN: 978-1-62708-301-0
... Abstract This chapter documents the key findings of an investigation into the failure of an aircraft’s main wheel bearing housing. Using annotated images and a detailed SEM fractograph, it shows what investigators observed that led them to conclude that the flange on one of the hubs broke off...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.9781627083010
EISBN: 978-1-62708-301-0
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260245
EISBN: 978-1-62708-336-2
... With the application of computers in both the design and manufacturing of extrusion dies, it has been possible to use very small bearing lengths. The scope is still there to optimize bearing lengths for each shape with respect to the alloy to be extruded and the life of the die. Friction and wear in the aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270087
EISBN: 978-1-62708-301-0
... turbine blade had oc- The load-bearing surfaces of the r tree root of the failed blade curred in another engine of the same aircraft. These were the only did not show any abnormal features. two instances of last-stage turbine blade failure in 20 years of service of the aircraft. The blade had failed...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540391
EISBN: 978-1-62708-309-6
.... Stress severity factors are used in the aircraft industry for fatigue analysis of attachment joints and other areas that are prone to crack development. Attachment joint configurations are of interest to engineers because so many structural joints are distributed throughout an aircraft. The following...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870307
EISBN: 978-1-62708-314-0
..., various sealing operations must be performed. Last, the leading edges, wing tips, and control surfaces of the wing torque box must be assembled. A typical fighter aircraft can have 200,000 to 300,000 mechanical fasteners, whereas a commercial airliner or transport aircraft can have 1,500,000 to 3,000,000...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270168
EISBN: 978-1-62708-301-0
... Abstract During cyclic spin tests, the turbine disc in an aircraft engine broke apart with a loud noise, followed by a fire. Based on a detailed examination and the results of SEM fractography and hardness measurements, failure analysts concluded that a locking plate became dislodged due...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360043
EISBN: 978-1-62708-435-2
... and heavy housings, as in turbomachinery, noncontact displacement probes are universally used, as illustrated in Fig. 2.2(b) . Some gas turbines, especially those in aircraft, are designed with relatively stiff rolling-element bearings and thus can effectively use housing-mounted transducers. To measure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180029
EISBN: 978-1-62708-256-3
... dense chrome plating on AISI 52100 carbon steel bearings without a 190 °C (375 °F) bake to remove the hydrogen absorbed during the plating process has been used in commercial applications with great success when replacing nonplated AISI 52100 carbon steel bearings. Inexpensive AISI 52100 carbon steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270102
EISBN: 978-1-62708-301-0
... Abstract A design modification intended to reduce dowel bolt failures in an aircraft engine proved ineffective, prompting an investigation to determine what was causing the bolts to break. As the chapter explains, failure specimens were examined under various levels of magnification...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300163
EISBN: 978-1-62708-323-2
... bearings/bushings Beryllium copper is widely used for aircraft and landing gear bearings versus hard (and lubricated) steel. These alloys are used for these kinds of applications because they have very high strength and their chemical dissimilarity helps resist scuffing tendencies under forceful...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270053
EISBN: 978-1-62708-301-0
... about half the cable with an axe, thereby reducing the load bearing capacity of the remaining strands and leading to failure ( Ref 1 ). A more serious sabotage was caused by deliberate damage of the control cables in a passenger aircraft. While this aircraft was being prepared for flight...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870517
EISBN: 978-1-62708-314-0
.... Bolted repairs are usually done on thick, highly loaded composite laminates, whereas bonded repairs are often required for thin-skin honeycomb assemblies. Fig. 19.1 Typical composite repairs. Source: Ref 1 All repairs of composite or bonded aircraft assemblies should be conducted...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940451
EISBN: 978-1-62708-302-7
... Resistance of Coatings Using Controlled Condensation • D 4627, Test Method for Iron Chip Corrosion for Water Soluble Metalworking Fluids • D 4636, Test Method for Corrosiveness and Oxidation Stability of Hydraulic Oils, Aircraft Turbine Engine Lubricants, and Other Highly Refined Oils • E 712...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870449
EISBN: 978-1-62708-314-0
... joint will be only about 40 to 50 percent as strong as the base laminate. In spite of this advantage, adhesively bonded joints are not always practical. Bonded joints are preferred if thin composite sections are to be joined where bearing stresses in bolted joints would be unacceptably high or when...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460227
EISBN: 978-1-62708-285-3
... of different components made from magnesium and aluminum alloys. Cast magnesium and aluminum alloys are used in aircraft components such as gear boxes and transmission housings because of their light weight, high strength-to-weight ratios, and lower manufacturing costs. The gear boxes and transmission housings...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870001
EISBN: 978-1-62708-344-7
... it by reference to causes involved in spectacular mechanical failures resulting in high loss of human life, large financial losses, or severe setbacks in public goals. Indeed, publicized failures of aircraft, power turbines, bridges, or structures of high visibility have convinced the public that metal fatigue...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170234
EISBN: 978-1-62708-297-6
... ( Fig. 1 ). Fig. 1 Plane-strain fracture toughness of maraging steels compared with fracture toughness of several ultrahigh strength steels as a function of tensile strength. Applications Maraging steels have been used extensively in two general types of applications: Aircraft...