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torsional loading

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0048169
EISBN: 978-1-62708-233-4
... and produce torsional vibrations. It was concluded that the two inner tabs had broken in fatigue as the result of cyclic loading that compressed and torsionally vibrated the spring. The fillets were replaced with slots to minimize stress concentration at the corners as a corrective measure. Aerospace...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091096
EISBN: 978-1-62708-234-1
... the conclusion that the basic failure mechanism was fracture by torsional fatigue, which started at numerous surface shear cracks, both longitudinal and transverse, that developed in the periphery of the root of the shear groove. These shear cracks resulted from high peak loads caused by chatter. The shear...
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Published: 01 January 2002
Fig. 2 Wolf's ear helical fracture due to torsion loading. (a) Schematic of brittle torsion fracture of chalk. (b) Helical tensile fracture of oxygen-free high-conductivity copper bar prestrained in torsion to a shear strain of 4. 3×. Source (b): Ref 26 More
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Published: 15 January 2021
Fig. 2 Wolf’s ear helical fracture due to torsion loading. (a) Schematic of brittle torsion fracture of chalk. (b) Helical tensile fracture of oxygen-free high-conductivity copper bar prestrained in torsion to a shear strain of 4.3×. Source (b): Ref 3 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001153
EISBN: 978-1-62708-225-9
... of the shot blasting, to put the surface into a state of even compressive internal stress, which must first be overcome during subsequent bending and torsional loading before the boundary zone comes under tensile stress, was therefore not realized in this case. On the contrary, the shot blasting led...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048158
EISBN: 978-1-62708-229-7
... torsional loading (along a plane 45 deg to the wire axis). Liquid-metal embrittlement was expected to have been caused by metals (Sn, Zn, Pb) which melt much below maximum service temperature of the turbine. The springs were concluded to have fractured by intergranular stress-corrosion cracking promoted...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001733
EISBN: 978-1-62708-225-9
... Abstract Drive cables from a rubber processing machine were failing in less than 8 h of operation, the expected service life being much greater than 100 h. Comparison cables were tested to failure under known stress conditions, including tensile overload, torsional loading, reversed bending...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0048082
EISBN: 978-1-62708-221-1
... was subjected to reverse torsional loading by the operation of the derrick and the shaft fatigue fracture was caused by this. The fillets at the roots of the spline teeth were increased in size and polished to minimize stress concentrations in these areas. Cracks Derricks Magnetic particle testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047813
EISBN: 978-1-62708-229-7
... for repair welding. The crack was opened by striking the small end of the shaft and the shaft was broken 1.3 cm away from the crack in the process. A previous fracture that resulted from torsional loading acting along a plane of maximum shear was revealed almost perpendicular to the axis of the shaft. Faint...
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Published: 01 June 2019
Fig. 5 Region showing torsional shear in the exemplar test specimen subjected to steady torsional loads. More
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Published: 15 January 2021
rod axis. An X-pattern can form under reversed torsional loading. Source: Ref 15 More
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Published: 01 January 2002
rod axis. An X-pattern can form under reversed torsional loading. Source: Ref 15 More
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Published: 01 December 2019
Fig. 2 Testing apparatus, 60,000 lb Tinius Olsen testing machine. Load applied to the drive wrench fastened to a shaft fixture. The load initiates a static torsional load to the test wrench. The product of peak load and drive wrench determine ultimate torque More
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Published: 15 January 2021
Fig. 47 Fractures due to identification marking . (a) Keyhole of a rotating - bending - loaded shaft . (b) Fracture of a torsion - loaded hexagonal transmission shaft More
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Published: 01 June 2019
Fig. 6 Region showing elongated dimples (microvoid coalescence) in the exemplar torsional load specimen. More
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Published: 01 June 2019
Fig. 7 Region showing quasi-cleavage in the exemplar specimen subjected to steady torsional loads. More
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Published: 01 January 2002
Fig. 17 4140 steel cross-travel shaft that failed in service. (a) Broken end of the shaft from a derrick showing the star-type fracture that results from reversed torsional loading. (b) Transverse section through the spline showing cracks initiated at sharp corners at the roots of the spline More
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Published: 01 June 2019
Fig. 1 4140 steel cross-travel shaft that failed in service. (a) Broken end of the shaft from a derrick showing the star-type fracture that results from reversed torsional loading. (b) Transverse section through the spline showing cracks initiated at sharp corners at the roots of the spline More
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Published: 30 August 2021
Fig. 38 Grade 4140 steel cross-travel shaft that failed in service. (a) Broken end of the shaft from a derrick showing the star-type fracture that results from reversed torsional loading. (b) Transverse section through the spline showing cracks initiated at sharp corners at the roots More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001547
EISBN: 978-1-62708-225-9
...-loaded springs. When a coil spring is compressed (or extended), the coil wires essentially are loaded in torsion. Under torsional loads, pure shear stresses develop along planes parallel and perpendicular to the wire axis, and pure normal; that is, tensile, stresses develop along planes 45° to the wire...