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Torsion

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001230
EISBN: 978-1-62708-236-5
... of which propagated at an angle of approximately 45 deg to the longitudinal axis, and therefore were caused by torsion stresses. Neither macroscopic nor microscopic examination determined any material or processing faults. Experience has shown that torsion vibration fractures of this kind usually appear...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001764
EISBN: 978-1-62708-241-9
... that the geometric differences between Designs 1 and 6 produce elevated levels of stress in the Design 6 fillet relative to the stress in the Design 1 fillet. For a static torsion loading of 1356 N-m (1000 ft-lbf), the maximum von Mises stress in the Design 6 fillet was 40.1% greater than the maximum von Mises...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001810
EISBN: 978-1-62708-241-9
... Abstract Several torsion bars had failed in a projectile weaving machine and were analyzed to determine the cause. Specimens prepared from the damaged components were subjected to visual inspection, hardness testing, chemical analysis, and metallurgical evaluations. The failed torsion bars had...
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...
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Published: 01 January 2002
Fig. 18 The 260 to 315 °C (500 to 600 °F) impairment in torsion toughness in very hard steels. Note: Reduction in toughness is not detected by hardness measurements. Source: Ref 4 More
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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: 01 January 2002
Fig. 52 Torsion fracture in an aluminum-silicon alloy (alloy 319-T5). Classic brittle torsion fracture on a plane at 45° to the axis of the cylinder. Hardness, 38 HRB; tensile strength, 179 MPa (26 ksi); total elongation, 0.5%. Source: Ref 42 More
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Published: 01 January 2002
Fig. 53 Macroscale brittle torsion fracture in an aluminum-silicon alloy (alloy A356 sand casting). Hardness, 38 HRB; tensile strength, 214 MPa (31 ksi); total elongation, 4%. Source: Ref 42 More
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Published: 01 January 2002
Fig. 55 Macroscale fracture surface of torsion-test specimen, where testing was done so as to avoid axial stresses during testing. Source: Ref 42 More
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Published: 01 January 2002
Fig. 56 Elliptical dimples (a) on the fracture surface of ductile torsion fracture of cast steels Source: Ref 42 . (b) Mode II dimples on wrought 6061-T6 aluminum tensile specimen. Courtesy of P. Werner, University of Tennessee More
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Published: 01 January 2002
Fig. 85 Fracture obtained by first plastic straining in torsion and then straining in tension. The fracture appearance becomes more characteristic of the first strain increment as the first strain increment increases in magnitude. Source: Ref 4 More
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Published: 01 January 2002
Fig. 8 Round bar in torsion More
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Published: 01 January 2002
Fig. 9 Rectangular bar in torsion More
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Published: 01 June 2019
Fig. 4 Laboratory ductile torsion failure reveals a flat, transverse break having smooth shear surface and microvoid formation. Magnification 510 (left) and 485 times (right). More
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Published: 01 June 2019
Fig. 5 Laboratory brittle torsion failure shows longitudinal, or axial, crack growth. Magnification 55 times. More
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Published: 01 June 2019
Fig. 6 Typical torsion failure in production stranding or bunching of colddrawn filaments of high carbon steel. Magnification 480 and 600 times. More
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Published: 01 June 2019
Fig. 8 Torsion fatigue fractures under bearing surface (fracture origin designated by arrows). 10× More
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Published: 01 June 2019
Fig. 9 Torsion fatigue fractures in fracture end. 10× More
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Published: 15 January 2021
Fig. 11 (a) Torsion damage showing deformation. (b) Classical smear on torsional fracture. (c) Deformed material on fracture surface of steel. Nital etch More