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Bending moment

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001781
EISBN: 978-1-62708-241-9
... moments generated during the downswing aggravated by manufacturing defects and stress concentration combined to create an overload condition. golf club fracture stress concentration aluminum alloy casting voids mechanical testing bending moment A360 (3xx.x series, cast aluminum-silicon alloy...
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
... misalignment can cause vibration and ultimately result in a fatigue failure in the shaft [ 1 ]. A gear shaft is usually subject to a high torsional moment and a bending moment as well as cyclic stresses which, when combined, may cause fatigue in the shaft. These factors may be influenced by stress...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001309
EISBN: 978-1-62708-215-0
... “beam” on the cargo box frame consists of two tubes separated by a finite distance, the resulting behavior is similar to that of a composite beam: the upper tube compresses and the lower tube elongates from the loading, resulting in a bending moment resisted by the short vertical member. The 90° angle...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001370
EISBN: 978-1-62708-215-0
... maximum and minimum loadings were exerted at each point around the perimeter of the shaft in the region of the maximum bending moment. The presence of multiple cracks normally implies a relatively high applied load and rotational bending. When a shaft is rotated in only one direction, the crack advances...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001794
EISBN: 978-1-62708-241-9
... initiated and progressed under a rotating bending moment. Indeed, in a rotating shaft, every point on the periphery sustains a tensile stress, then a compressive stress once every revolution [ 5 ]. This loading condition explains the initiation of the crack on the shaft circumference and its progression...
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
... compression, bending, torsion). Finally, the factors influencing the appearance of a fracture surface and various imperfections or stress raisers are described, followed by a root-cause failure analysis case history to illustrate some of these fractography concepts. brittle fracture crack nucleation...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001762
EISBN: 978-1-62708-241-9
... high-performance tires (better coefficient of friction or road grip) have raised the tire patch forces on the wheel and axle thus increasing the stresses that the axle must withstand. Vertical forces in the plane of the wheel produce much lower axle stresses because of the smaller moment arm from the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046160
EISBN: 978-1-62708-224-2
.... The axial movement of the crane wheel allowed the torsional moment to be displaced toward the location of the maximum bending moment, increasing the total effective stress. The edges of the portion of the keyway in the broken axle were battered and misshapen ( Fig. 1c ), apparently from repeated...
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
... gear box, the rotating shaft usually endures loadings associated with torsion and bending moments, producing a steady torsion stress and cyclic bending stress. As a result, the shafts are susceptible to fatigue failure during the operation [ 1 ]. In this study, the reverse shaft was used for...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001058
EISBN: 978-1-62708-214-3
... covered with a dirty deposit, possibly from a pipe-sealing compound that may been used in a preliminary attempt to seal the leak from the outside. A small section of thread was missing, having broken off because of the bending moments caused by forces used in futile attempts to drive the plug farther...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001127
EISBN: 978-1-62708-214-3
... as the bending moment produced as the ball floats in the water to press the rod against the water-valve closure. The zinc oxide paste should not have been used in this situation. Visual inspection showed that both failures occurred at the base of the nipple of each float ball. The nipple broke off...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001378
EISBN: 978-1-62708-215-0
.... Hardness tests on the stud bolt revealed an average hardness of 37 HRC. The cracks in the threads were probably caused by a high stress concentration at the thread root, which was due to a bending moment caused by hammering of the boss and clevis, especially with a gap between the boss and die. Machine...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001054
EISBN: 978-1-62708-214-3
... bend loading, with the joint at the center of the span at the location of maximum bending moment. Therefore, the induced bending stresses were normal to the plane of the joint. Loading of the specimen was achieved by tightening a lubricated screw against the specimen with a calibrated wrench to a...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001065
EISBN: 978-1-62708-214-3
... RT 17.6 13.0 4 190 375 18.0 13.25 5 190 375 17.6 13.0 6 190 375 18.3 13.5 (a) RT, room temperature (20 °C, or 70 °F) Two face bend specimens were also machined and subjected to a bending moment similar to that depicted in part OW-466.1 of section IX of the ASME...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001851
EISBN: 978-1-62708-241-9
... e from the geometrical shaft center, and Ω r is defined as: Ω r = d θ r dt and where C Mx is the bending moment induced by shaft misalignment, which is expressed as: (Eq 12) C Mx = ∑ n = 1 ∞ − 1 n + 1 I z + m B e 2 Ω m 2...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001842
EISBN: 978-1-62708-241-9
... diagram, identifying the bending moment at the fracture location to be 237,880 lb-in. (26,888 N m). As the roll rotates, the corresponding fully reversed stress (without compensating for the variation in a roll wall thickness) would be 1770 psi (12,204 kPa). Other contributing loads due to, say, hoop...
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
... repeated indexes. Therefore, σ xx can be written σ x , and the other normal stresses can be written likewise. Also, a simple application of equilibrium (moment summation) shows that the shear-stress components, τ xy and τ yx , are equal. This applies as well to the other shear-stress components...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001312
EISBN: 978-1-62708-215-0
... tubular region and the two end cups, local discontinuity stresses (shear stress and bending moments) would have developed at the junctions of the deformed and undeformed regions to preserve the continuity of the tube wall. Any plastic deformation of material due to these localized discontinuity stresses...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001797
EISBN: 978-1-62708-241-9
... i ¯ = I ¯ i + I ¯ i + 1 / 2 and A i ¯ = A ¯ i + A ¯ i + 1 / 2 are, respectively, the quadratic moments and the cross-sectional areas at S i . The corresponding bending stiffness, K b, can be obtained by (Eq 13) K b...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001761
EISBN: 978-1-62708-241-9
... improper repairing, and/or worn bearings create a bending moment and concentrate the stresses at some point on the crankshaft. This would also cause vibrations. However, these higher stresses would originate mechanical fatigue cracks at the weakest points of the crank, namely at the fillets. Cracks would...