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Image
Published: 01 June 1985
Fig. 4-43. Torsional shear. Suddenly applied extreme torsional overload. More
Image
Published: 01 September 2008
Fig. 8 Fracture of an ISO 12.9 bolt by ductile torsional overload. (a) Overall view of fracture. (b) Smooth and fibrous fracture as seen through the SEM. (c) Microvoid coalescence (dimples) More
Image
Published: 01 October 2005
Fig. CH25.2 SEM fractograph showing features typical of torsional overload More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270122
EISBN: 978-1-62708-301-0
... microscopes, was flat and shiny with deformation marks and dimples, typical of torsional overload, and signs of severe rubbing on the periphery. Based on their observations, investigators concluded that the quill shaft failed by torsional overload, the source of which could not be determined. quill...
Image
Published: 01 June 1985
Fig. 3-2. Unidirectional torsion overload in a 1-in.-diam jack shaft, as revealed by magnetic-particle inspection by “Magna-Glo” method. Photographed using a standard “black” light and Polaroid Polacolor-2 Type 58, 4×5 Land film, ASA75, f /11, for one minute. More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270124
EISBN: 978-1-62708-301-0
... that a considerable amount of rubbing occurred after the shaft broke. SEM fractography revealed deformation marks and elongated dimples, typical of shear overloads, along with other details. Based on their analysis, investigators concluded that the cardan shaft failed under torsional overload. They also cited a need...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270074
EISBN: 978-1-62708-301-0
..., causing adhesive wear and the welding of slipper pad material onto the surface of a mating cam plate. Excessive friction between the slipper pads and cam plate, in turn, created a torsional overload that caused the camshaft to break. The chapter presents SEM images showing the wear pattern on one...
Image
Published: 30 November 2013
Fig. 5 Single-overload torsional fracture on the transverse shear plane of a shaft of medium-carbon steel of moderate hardness. Note that the originally straight splines have been twisted in a counterclockwise direction. Final rupture was slightly off center due to a relatively slight bending More
Image
Published: 30 November 2013
Fig. 6 Single-overload torsional fracture of a shaft of ductile steel similar to that in Fig. 5 . The hole in the center is the lathe center from the original machining on the part More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270130
EISBN: 978-1-62708-301-0
... aircraft were also found failed. Also, a new bolt had failed during fitment. Investigations revealed that the five bolts had failed by SCC and the new bolt by torsional overload due to excessive torque tightening. Background An aircraft crashed following loss of yaw control while in full airborne...
Image
Published: 01 August 2005
Fig. 2.16 Free-body diagrams showing orientation of normal stresses and shear stresses in a shaft under simple (a) tension, (b) torsion, and (c) compression loading, and the single-overload fracture behavior of ductile and brittle materials More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.9781627083010
EISBN: 978-1-62708-301-0
Image
Published: 30 November 2013
Fig. 1 Free-body diagrams showing orientation and elastic distribution of normal (tensile and compressive) and shear stress components in a shaft under pure (a) tension, (b) torsion, and (c) compression loading. Also shown is single-overload fracture behavior of ductile and brittle materials More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630071
EISBN: 978-1-62708-270-9
... under pure (a) tension, (b) torsion, and (c) compression loading. Also shown is single-overload fracture behavior of ductile and brittle materials under these loading conditions (bottom diagrams). T, tension. C, compression. Adapted from Ref 1 Tension Loading When a shaft or similar shape...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420085
EISBN: 978-1-62708-452-9
... (spalling), thermal fatigue, and shaft fatigue. Tooth bending impact includes tooth shear, tooth chipping, case crushing, and torsional shear. abrasive tooth wear bending fatigue bending impact failure mode analysis gears Although this definition generally has been accepted...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420129
EISBN: 978-1-62708-452-9
... fracture centering around a nonmetallic inclusion at the case/core interface. Only one tooth spalled. An isolated, random case. Figure 5-3 shows an example of a shaft failure in torsional fatigue along the longitudinal shear plane, with its origin centered along an elongated oxide stringer...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... Abstract Fatigue fractures are generally considered the most serious type of fracture in machinery parts simply because fatigue fractures can and do occur in normal service, without excessive overloads, and under normal operating conditions. This chapter first discusses the three stages...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420043
EISBN: 978-1-62708-452-9
... parts and to the background knowledge. The analyst may state that a set of gears is grossly overloaded. The field service person may then, for example, take the input shaft and find torsional fatigue cracks by the use of magnetic-particle inspection. Verification of facts by the sharing of knowledge...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360091
EISBN: 978-1-62708-435-2
... or harmonics close to 21 Hz as the turbine rotates under load, which confirms that the 21 Hz vibration is not induced by any rotational component in the power train. To see if torsional and lateral critical speeds of the power train or any higher-order turbine speed influence the 21 Hz vibration, torsional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... = 0 (Eq 2.34c) For torsion , τ max = σ 1 = σ max Fig. 2.16 Free-body diagrams showing orientation of normal stresses and shear stresses in a shaft under simple (a) tension, (b) torsion, and (c) compression loading, and the single-overload fracture behavior...