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torsional creep-fatigue life analysis

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... details on testing are given in the article “Fatigue, Creep Fatigue, and Thermomechanical Fatigue Life Testing” in Mechanical Testing and Evaluation , Volume 8 of the ASM Handbook , 2000. Damage Tolerance Criterion In the latter half of the 20th century, the fracture mechanics approach gained...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... in high-temperature applications. The complex effects of creep-fatigue interaction are also discussed, although more detail on this is described in the article “Thermomechanical Fatigue: Mechanisms and Practical Life Analysis” in this Volume. Life assessment is also covered in the article “Elevated...
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
...-welded high-energy piping failures ( Ref 13 ) 1986–2000 Cavitation and creep voids in welds, resulting in catastrophic high-energy rupture Development of elevated-temperature life assessment techniques for cavitation and creep failure Aloha incident, Boeing 737 ( Ref 14 ) 1988 Accelerated...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... characteristics associated with either monotonic or cyclic behavior. Further details on testing are given in the article “Fatigue, Creep Fatigue, and Thermomechanical Fatigue Life Testing” in Mechanical Testing and Evaluation , Volume 8 of the ASM Handbook. Damage Tolerance Criterion In the latter...
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
... techniques for cavitation and creep failure Aloha Incident, Boeing 737 ( Ref 13 ) 1988 Accelerated corrosion and multiple fatigue crack-initiation sites in riveted fuselage skin Improved aircraft maintenance and inspection procedures Life assessment methods developed for multiple-site damage (MSD...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
.... Torsional fatigue can result from application of a fluctuating or an alternating twisting moment (torque). Axial fatigue can result from application of alternating loading. More complete information is available in the article “ Fatigue Failures ” in Failure Analysis and Prevention , Volume 11 of the ASM...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... and is relatively rare in normal operation. Creep, a form of distortion at elevated temperatures, can lead to stress rupture and can also cause shafts having close tolerances to fail because of excessive changes in critical dimensions. Fracture Origins Fractures of shafts originate at points of stress...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... (ductile, brittle, fatigue, and creep) are described briefly, principally in terms of fracture appearances. A description of the surface, structure, and behavior of each fracture process is also included. The article provides a framework from which a prospective analyst can begin to study the fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001485
EISBN: 978-1-62708-225-9
... liquids, and stray electric currents. Most common modes of failure include flaking or pitting (fatigue), cracks or fractures, creep, smearing, wear, softening, indentation, fluting, and corrosion. The modes of failure are illustrated with examples from practice. Roller bearings Rolling-bearing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001424
EISBN: 978-1-62708-233-4
... of creeping cracks which originated at the weld root and progressed radially outwards, extending in some cases into the parent metal as indicated. It will also be noted that the slot for the reception of the bar, which was only 1 2 in. deep, had been flame-cut and not subsequently machined. After...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001459
EISBN: 978-1-62708-234-1
... of motion, such as occurs if a train of gears becomes jammed, the angular momentum of the rotating parts sufficing to cause rupture. In the case of a fatigue failure due to fluctuating or reversing torsion, however, a creeping crack invariably develops on a helical plane which is orientated at an angle...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... Abstract This article provides an overview of fractography and explains how it is used in failure analysis. It reviews the basic types of fracture processes, namely, ductile, brittle, fatigue, and creep, principally in terms of fracture appearances, such as microstructure. The article also...
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
.... Specifically, mechanical and vibration-induced fatigue, thermal fatigue and thermal shock, corrosion fatigue, and creep fatigue interaction are briefly discussed. Understanding typical fatigue damage morphology is useful when performing metallurgical failure analysis of a component failure. Furthermore...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... elastic fracture mechanics analysis, with some mention of elastic-plastic fracture mechanics analysis. The article describes the probabilistic aspects of fatigue and fracture. Information on crack-growth simulation of the material is also provided. crack-growth simulation elastic-plastic fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... not necessarily in the same related order: flaking or pitting (fatigue), cracks or fractures, rotational creep, smearing, wear, softening, indentation, fluting, and corrosion ( Ref 2 ). Two or more failure mechanisms can be active simultaneously and can thus be in competition with one another to terminate...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... Abstract This article describes the underlying fundamentals, applications, the relevance and necessity of performing proper stress analysis in conducting a failure analysis. It presents an introduction to the stress analysis of bodies containing crack-like imperfections and the topic...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006815
EISBN: 978-1-62708-329-4
... fatigue versus high-cycle fatigue, abrasive wear versus adhesive wear, uniform corrosion versus galvanic corrosion, and tensile overload versus creep. As an example, a washing machine for clothes may have a fractured coupling between the shafts of the electric motor and the transmission. Upon proper...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
..., boiler tubes are also subjected to creep-rupture tests to evaluate their ability to withstand high temperatures under stress and thereby judge their useful remaining life. Chemical Analysis In a failure investigation, it is customary to carry out chemical analysis of the material on a routine...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
..., circular shaft in torsion may buckle into a helical configuration when a critical moment is exceeded. Creep or distortion from other causes may change the dimensions of a structure so that it becomes susceptible to buckling. Further details can be found in references such as Ref 5 . Safety Factors...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
... in torsion may buckle into a helical configuration when a critical moment is exceeded. Creep or distortion from other causes may change the dimensions of a structure so that it becomes susceptible to buckling. Further details can be found in references such as Ref 4 . Safety Factors In both classical...