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shear and torsional properties

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001091
EISBN: 978-1-62708-214-3
... by torsional shear. Gas turbines Shafts (power) Torsional fatigue 4140 UNS G41400 Fatigue fracture Background A steel turbine impeller shaft fractured after 2 months of service. Applications The shaft was part of the impeller system of a gas turbine and, owing to the manner in which...
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
... It is characterized by a flat transverse break and a fracture which has a smooth shear surface toward the outer periphery of the wire and a microvoid formation at the center. Fig. 4 Laboratory ductile torsion failure reveals a flat, transverse break having smooth shear surface and microvoid formation...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001802
EISBN: 978-1-62708-241-9
... on a plane parallel to the maximum shear stress. Higher magnification SEM analysis of the torsional overload fracture surfaces also reveals distinctive features. Near the outer diameter (OD) of the wire, the torsional failure fracture surfaces show a large amount of rubbing, shown in Fig. 3...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006930
EISBN: 978-1-62708-395-9
... is being displayed, it is usually convenient to use the ratios that are shown in Table 1 . For example, when the flow properties of a polymer are being described, the most common way of presenting the data are being displayed as viscosity (η) versus shear rate (γ̇), both of which are graphed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001094
EISBN: 978-1-62708-214-3
... acceptable service performance for several years in similar applications. Visual Examination of General Physical Features Examination of the fractured screws revealed discolored, brittle fractures in a major portion of the cross sections; the remainder were bright torsional shear fractures ( Fig. 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001596
EISBN: 978-1-62708-225-9
... The corrected torsion stress combines the direct shear stress with the pure torsional stress shown in Fig. 5 to give a resultant total torsional stress. The measured height of the spring of interest was 25.0 mm with the weight of the compressor pump. This height corresponds to a deflection of 4.55 mm. Based...
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
... is a point. By improperly neglecting the third principal stress, even though it is zero, one would conclude that no shear stresses are present, when, in fact, τ max is S /2 and acts on two perpendicular planes. Consider next the case of a torsional stress, τ, combined with an axial stress, σ 1 . The 2D...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001763
EISBN: 978-1-62708-241-9
... With a heavy-duty load factor (2.0 for bending and torsional moment), the maximum values of dynamic stress estimated at root diameter of spline tooth are 279 MPa in tension and 165 MPa in shear, respectively. Finite Element Modeling A finite element stress analysis was carried out to determine...
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
... perpendicular planes. Consider next the case of a torsional stress, τ, combined with an axial stress, σ 1 . The 2D stress tensor is: [ σ 1 τ τ 0 ] Mohr's circle correctly predicts the maximum shear stresses to be: τ max = ± ( σ 1 2 ) 2...
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
...-life criterion gas porosity heat treatment inclusions infinite-life criterion internal bursts macropitting micropitting reversed bending rolling-contact fatigue rotational bending strengthening stress distribution subcase fatigue thermal fatigue torsional loading FATIGUE damage...
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
... connecting rods contact fatigue corrosion distortion ductile fracture failure investigation fatigue failures fatigue properties metallurgical factors piston rods shafts surface coatings torsional fatigue A SHAFT is a metal bar—usually cylindrical in shape and solid, but sometimes hollow...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... half of the fracture surface, it is possible to identify loading conditions at the microscale, for example, to distinguish between bending and torsion or shear loading. When compact-tension-type specimens are loaded, the combined bending and axial loading does not result in very much, if any...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001677
EISBN: 978-1-62708-222-8
... to cyclic applied bending loads. The fracture of the specimen subjected to steady continuous twisting loads exhibited basically three separate areas. The first area was that of torsional shear, Figure 5 . This area progressed toward the final fracture region exhibiting more pronounced and detailed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... directions on each half of the fracture surface, it is possible to identify loading conditions at the microscale, for example to distinguish between bending and torsion or shear loading. When compact tension-type specimens are loaded, the combined bending and axial loading does not result in very much...
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
... different approximations of the fatigue diagram. The shape of the diagram depends mainly on the material, the geometry of the component, and the type of loading (axial, bending, torsion, and shear). The lines are determined by the ultimate tensile strength, S u , and the alternating fatigue strength...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001668
EISBN: 978-1-62708-232-7
... the specified proof load. However, this value was still below the actual yield point of the material even with a biaxial tension/torsion load. Bolt Strengths and Specifications Table 2 Bolt Strengths and Specifications Property Measured Values Specified Mean Std Dev Value (a) Yield...
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
... prior processing. Applied and residual stresses can be additive. Figure 1 shows simplified, two-dimensional, free-body diagrams illustrating the orientations of the normal-stress and shear-stress systems at any internal point in a shaft loaded in pure tension, torsion, and compression. Also...
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
... hooks. The source of the stress concentration was investigated. A concentration of torsional shear stress that results from the geometry of the bend at the base of the end hook is identified in a commonly used mechanical spring design standard. 3 The severity of the stress concentration depends...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001119
EISBN: 978-1-62708-214-3
... of the torsional moment. Ductile material in torsion fails because of shear overload perpendicularly to the axis of the torsional moment. When a ductile material fails by torsional overload, ductile features (dimples) are expected on the fracture surface. When a ductile material fails in torsion...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001792
EISBN: 978-1-62708-241-9
... of the longitudinal or transverse shear stresses. Cleavage or cleavage-like steps in the fracture surface (see Fig. 2c ) are also supportive of sudden torsional overload of the clutch shaft [ 6 ]. The rotary-bending fatigue failure of the gearbox shaft exerted suddenly a high torsional stress on the corroded clutch...