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damage tolerance analysis

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0090030
EISBN: 978-1-62708-217-4
... to address the anomalies, with the objective of enhancing rotor life management practices. The ongoing work involves the use of fracture mechanics and software (called DARWIN.) optimized for damage tolerant design and analysis of metallic structural components. Compressors Damage tolerance analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003515
EISBN: 978-1-62708-180-1
... , 1996 9. Cameron D.W. and Hoeppner D.W. , Fatigue Properties in Engineering , Fatigue and Fracture , Vol 19 , ASM Handbook , ASM International , 1996 , p 15 – 26 10. Broeck D. , Concepts of Fracture Control and Damage Tolerance Analysis , Fatigue and Fracture...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006819
EISBN: 978-1-62708-329-4
.... Finally, the article presents practical fatigue assessment case studies of in-service equipment (pressure vessels) that employ DBA methods. damage tolerance design analysis fatigue damage mitigation fatigue life assessment fracture mechanics pressure vessels welds FATIGUE FAILURE of metal...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001081
EISBN: 978-1-62708-214-3
... under estimated, which led to low-cycle fatigue cracking earlier than expected. Fracture mechanics analysis of the disks was carried out to assess their damage tolerance and to predict safe inspection intervals. Fatigue life Fracture mechanics Gas turbine engines Jet planes Low-cycle fatigue...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
... loading spectrum for fatigue and damage-tolerance analysis and test. This has led to much effort being expended to quantitatively define how the variation of key spectrum parameters affect crack growth life ( Ref 18 ). The key question remains how closely a design spectrum must simulate real life usage...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006802
EISBN: 978-1-62708-329-4
... of stiffeners on stress distribution Establishment of aircraft structural integrity program in 1958 F-111 aircraft 94 wing pivot fitting ( Ref 11 ) 1969 Fatigue failure due to material defect in high-strength steel Improved inspection techniques Change from fatigue “safe-life” to damage-tolerant design...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... “safe-life” to damage-tolerant design philosophy Development of materials with improved toughness Seam-welded high-energy piping failures ( Ref 12 ) 1986–2000 Cavitation and creep voids in welds resulting in catastrophic high-energy rupture Development of elevated-temperature life assessment...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046870
EISBN: 978-1-62708-217-4
..., probably water in the hydraulic oil, had been present in service. No material or fabrication defects were detected, nor was there any other service damage that could be related to the failure. Chemical analysis showed that the steel conformed in composition to the requirements of the specified material...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046418
EISBN: 978-1-62708-234-1
... Abstract Equipment in which an assembly of in-line cylindrical components rotated in water at 1040 rpm displayed excessive vibration after less than one hour of operation. The malfunction was traced to an aluminum alloy 6061-T6 combustion chamber that was part of the rotating assembly. Analysis...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001087
EISBN: 978-1-62708-214-3
... that these rotors exhibited a progression of the damage shown in Fig. 4 . Chemical Analysis/Identification The composition of the rubbers was investigated using attenuation total reflectance infrared spectroscopy (ATR-IR). ATR-IR confirmed that the polymer was composed of isoprene blocks, consistent...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001460
EISBN: 978-1-62708-221-1
... Abstract Tie bars of a dragline excavator each consisted of a rectangular section steel bar to which eye-pieces, to facilitate anchorage, were attached by butt-welds. Failure of one weld in each bar after seven years of service allowed the boom to fall and become extensively damaged...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003514
EISBN: 978-1-62708-180-1
... of fracture (PROF) computer code to quantify the probability of failure of aircraft structures with consideration of inspection, structural replacement, and repair ( Ref 24 ). The commercial aircraft gas turbine engine industry is adopting a probabilistically-based damage tolerance analysis method...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003513
EISBN: 978-1-62708-180-1
... ). In addition, the FAD is the recommended approach for the damage-tolerance analysis of ship structures ( Ref 8 ). The background and derivations of the FAD were the subject of a theme issue of The International Journal of Pressure Vessels and Piping ( Ref 9 ). Applications of, and experience with, the FAD...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048665
EISBN: 978-1-62708-217-4
... to the plane. The primary service stress on the pins was shear. The pins had nominal dimensions of 41-mm (1.6-in.) outside diameter, 25-mm (1-in.) inside diameter, and 178-mm (7-in.) length, and they had a smooth push fit with a hole tolerance of +0.04 to +0.1 mm (+0.0015 to +0.0040 in.). They were shot peened...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... Abstract This article is dedicated to the fields of mechanical engineering and machine design. It also intends to give a nonexhaustive view of the preventive side of the failure analysis of rolling-element bearings (REBs) and of some of the developments in terms of materials and surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048498
EISBN: 978-1-62708-234-1
... localized buckling of the skin panel was evident between each of these through-thickness fractures. To define areas of nonvisible damage, that is, delamination, a nondestructive evaluation was performed with TTU. This analysis revealed a roughly 10-cm (4-in.) wide band of delamination between the areas...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001298
EISBN: 978-1-62708-215-0
... spar A single corrosion pit, 0.38 mm (0.015 in.) deep, led to a fatigue failure of the spar The failure initiated on the pylon side of the blade. Dimensional analysis of the spar near the failure revealed measurements within engineering drawing tolerances. Though corrosion pitting was present...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
.... The latter had sustained substantial mechanical damage, rendering it useless for evaluation. Therefore, the entire failure analysis was performed on small sections cut from the impeller itself. Visual Examination of General Physical Features The surface of the casting was visually examined for casting...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
..., be they loss of production, property damage, injury, or fatality. The discipline has also been used effectively as a teaching tool for new or less experienced engineers. The importance and value of failure analysis to safety, reliability, performance, and economy are well documented. For example...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001418
EISBN: 978-1-62708-231-0
... Abstract The crankshaft of a six cylinder, 225-hp diesel engine driving a small locomotive was examined. About nine months after installation a fall in oil pressure was traced to damage to No. 5 crank pin bearing. A small lip present on one side of the discontinuity apparently served to scrape...