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torsional fatigue

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001495
EISBN: 978-1-62708-221-1
... and thus met material specification. The failure was a result of torsional fatigue in the tensile plane, originating from one of several gouges around the splined radius of the shaft. The fatigue crack progressed for a large number of cycles before final fracture. The shaft met metallurgical requirements...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001468
EISBN: 978-1-62708-221-1
... Abstract In a shaft subjected to reversed torsional stresses, failure resulted from the gradual development of fatigue cracks from opposite sides of the shaft. These broke out from origins located adjacent to the fillets at the start of the square section. The remaining uncracked material which...
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. 17 Torsional fatigue failure of boron-containing alloy steel helical spring. Fatigue initiated at an abraded area marked by arrows. The material in compression coil springs is subjected to unidirectional torsion, so fatigue propagates on a single helical surface. Source: Ref 4 More
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Published: 01 January 2002
Fig. 19 Surface of a torsional-fatigue fracture in an induction-hardened 1041 (1541) steel shaft. The shaft fractured after 450 hours of endurance testing. 1 1 4 ├Ś More
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Published: 01 January 2002
Fig. 30 Schematic of the initiation of torsional-fatigue cracks in shaft subjected to longitudinal shear (a) or transverse shear (b). Dashed lines indicate other cracks that can appear when torsional stresses are reversed. More
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Published: 01 January 2002
Fig. 31 Fracture surfaces of a torsional fatigue-test specimen. Courtesy of Greg Fett, Dana Corporation More
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Published: 01 January 2002
Fig. 32 4340 steel rotor shaft that failed by torsional fatigue. (a) Shear groove designed to protect gear mechanism from sudden overload. Dimensions are in inches. (b) Star-shaped pattern on a fracture surface of the shaft. (c) Longitudinal and transverse shear cracks on the surface More
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Published: 01 January 2002
Fig. 7 4340 steel rotor shaft that failed by torsional fatigue. (a) Shear groove designed to protect gear mechanism from sudden overload. Dimensions are in inches. (b) Star-shaped pattern on a fracture surface of the shaft. (c) Longitudinal and transverse shear cracks on the surface More
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Published: 01 January 2002
Fig. 15 Stress fields and corresponding torsional-fatigue cracks. (a) and (b) Shaft with keyway. (c) Shaft with splines More
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Published: 01 June 2019
Fig. 1 Failure of this axle shaft resulted from torsional fatigue in the tensile plane, originating from one of several gouge marks observed around the shaft at the splined radius. The fatigue crack progressed for a large number of cycles before final fracture. More
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Published: 01 June 2019
Fig. 1 Torsional fatigue failure of a luffing shaft. More
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Published: 01 June 2019
Fig. 1 4340 steel rotor shaft that failed by torsional fatigue. (a) Shear groove designed to protect gear mechanism from sudden overload. Dimensions are in inches. (b) Star-shaped pattern on a fracture surface of the shaft. (c) Longitudinal and transverse shear cracks on the surface More
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Published: 15 January 2021
Fig. 28 Surface of a torsional fatigue fracture in an induction-hardened 1041 (1541) steel shaft, which fractured after 450 h of endurance testing More
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Published: 15 January 2021
Fig. 39 Schematic of the initiation of torsional fatigue cracks in a shaft subjected to (a) longitudinal shear and (b) transverse shear. Dashed lines indicate other cracks that can appear when torsional stresses are reversed. More
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Published: 15 January 2021
Fig. 40 Fracture surfaces of a torsional fatigue test specimen. Courtesy of G. Fett, Dana Corporation More
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Published: 15 January 2021
Fig. 41 4340 steel rotor shaft that failed by torsional fatigue. (a) Shear groove designed to protect gear mechanism from sudden overload (dimensions are in inches). (b) Star-shaped pattern on a fracture surface of the shaft. (c) Longitudinal and transverse shear cracks on the surface More
Image
Published: 15 January 2021
Fig. 17 Torsional fatigue failure of boron-containing alloy steel helical spring. Fatigue initiated at an abraded area marked by arrows. The material in compression coil springs is subjected to unidirectional torsion, so fatigue propagates on a single helical surface. Source: Ref 4 More
Image
Published: 30 August 2021
Fig. 7 Grade 4340 steel rotor shaft that failed by torsional fatigue. (a) Shear groove designed to protect gear mechanism from sudden overload. Dimensions are in inches. (b) Star-shaped pattern on a fracture surface of the shaft. (c) Longitudinal and transverse shear cracks on the surface More
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Published: 30 August 2021
Fig. 27 Stress fields and corresponding torsional-fatigue cracks. (a) and (b) Shaft with keyway. (c) Shaft with splines More