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load-bearing capacity

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047521
EISBN: 978-1-62708-218-1
...Abstract Abstract A supplementary axle, which was used as an extension to a highway-trailer tractor to increase its load-bearing capacity, failed in service. The rolled steel channel extensions that secured the axle assembly to the tractor main-frame I-beams fractured transversely...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... Abstract Overload failures refer to the ductile or brittle fracture of a material when stresses exceed the load-bearing capacity of a material. This article reviews some mechanistic aspects of ductile and brittle crack propagation, including a discussion on mixed-mode cracking, which may also...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... presents the variables of interest for a rotating shaft and the load-carrying capacity and surface roughness of bearings. Grooves and depressions are often provided in bearing surfaces to supply or feed lubricant to the load-carrying regions. The article explains the effect of contaminants in bearings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001232
EISBN: 978-1-62708-233-4
...Abstract Abstract A bolt breaks along a change in cross section well below its rated capacity. An anchoring screw spins freely in place, having snapped at its first supporting thread. A motor unexpectedly disengages its load, its driveshaft having fractured near a keyway. Such failures...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001786
EISBN: 978-1-62708-241-9
... have caused formation of fatigue microcracks at the circlip groove. These microcracks were rubbing against each other during service and resulted in the reduction of cross section of the shaft and thereby reduction in load bearing capacity. During the sudden collision of tool post with the chuck...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001363
EISBN: 978-1-62708-215-0
.... The bearing set failed because of the generation of excessive heat by repeated operation at and beyond its load/speed capacity. The bearing set for the PTR will be resized to withstand the actual, maximum load/speed combinations that it will experience during operation. Thermocouples will be installed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
... extra improved plow steel (EEIPS) grade wire ropes. These types of wires have typically 10% higher load-bearing capacity as compared with other grades. They are considered as heavy-duty wire ropes and are primarily used in engineering applications. The minimum tensile strength of EEIPS is 2160 N/mm 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001560
EISBN: 978-1-62708-217-4
... cracks growing from the surface concentrate the stress at the crack tip. The load bearing capacity is then reduced without further reduction in the apparent cross-sectional area. In all tests conducted in the residue paste, fracture initiated at the metal/solution interface. Figures 6 , 7 , and 8...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001285
EISBN: 978-1-62708-215-0
.... This damage was caused by overtightening of the clip, which seriously reduced the load-carrying capacity of the rope. Failure of the rope occurred in the leg of the loop at the point where the U-bolt side of the clip pressed against it. Consequently, this side was the most severely damaged by overtightening...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... (thrust) loads. Angular-contact bearings are used in applications that involve combinations of radial loads and high axial loads and require precise axial positioning of shafts. Thrust bearings are used primarily in applications involving axial loads. Roller bearings have higher load capacities than...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001438
EISBN: 978-1-62708-224-2
...Abstract Abstract A crane hook of 200T rated capacity failed suddenly at an indicated load of 143T, while the crane was undergoing a load test. Fracture took place through the intrados of the hook at the region of maximum stress. The jib and other portions suffered subsequent damage following...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001473
EISBN: 978-1-62708-229-7
... in which the teeth were hobbed. The pinion was machined from the solid and its direction of rotation was such that, under normal operating conditions, the journal loads were imposed on the top halves of the bearings. A flexible coupling was interposed between the turbine rotor and the pinion while...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047991
EISBN: 978-1-62708-225-9
... to be flame hardened to 55 HRC minimum and 50 HRC 3.2 mm ( 1 8 in.) below the surface. Other surfaces of the rings were to have a hardness of 24 to 28 HRC. The bearing capacity at 1.67 rpm was a radial load of 713,000 kg (1,572,000 lb) and an axial (thrust) load of 459,000 kg (1,012,800 lb). Samples...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001831
EISBN: 978-1-62708-241-9
... roller bearing, prototype of which in the form of logs with a large stone block on them could even date back to ancient Egyptian era, possesses its popularity in applications that are always involved with heavy radial loading and high-speed operation, such as power generation, oil field, and mining...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
.... These gears have low load-carrying capacity, but are useful where shafts must rotate at an angle to each other. Worm-gear sets are usually right-angle drives consisting of a worm gear (or worm wheel) and a worm. Figure 4 shows a double-enveloping worm-gear set. Worm-gear sets are used where the ratio...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001846
EISBN: 978-1-62708-241-9
... and the area is about one-third of the whole fracture area (marked in Fig. 4 ). This observation suggests that the load which the main shaft bore was significantly less than the load carrying capacity of the shaft. The corresponding length of the radial crack propagation steps in various orientations suggests...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001680
EISBN: 978-1-62708-221-1
...-rotating Rope. The middle strands and outside strands are laid in opposite directions to produce the rotation resistant properties. Wire ropes are so constructed that the failure of an individual wire does not affect the load bearing capacity of the rope. The number, distribution, and type of wire...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001485
EISBN: 978-1-62708-225-9
... of revolutions that 90% of these will endure before failure becomes evident. The load capacity of a bearing is governed by its dimensions, the properties of the material, and the number of rolling elements. The latter factor also controls the magnitude and the rate of repetition of the stresses which arise...
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
... criteria was adopted to determine the geometry of the shaft required to provide sufficient load-carrying capacity. However, unexpected fatigue fracture can still occur during operation and service [ 3 – 5 ]. To identify the cause of fracture of the shaft, this study investigated the stress conditions...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... of fretting movement, it follows that the most likely area for it to occur is in machinery. The contacts between hubs, shrink and press fits, and bearing housings on loaded rotating shafts or axles are particularly prone to fretting damage, but because the movement arises from alternating stresses...