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shearing machines

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047813
EISBN: 978-1-62708-229-7
... attached to the shaft. A circumferential crack in the main shaft at an abrupt change in shaft diam just below the upper radial bearing was revealed by visual examination. The smaller end of the shaft was found to be slightly eccentric with the remainder when the shaft was set up in a lathe to machine out...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001243
EISBN: 978-1-62708-225-9
...Abstract Abstract A needle bearing from a filling and seating machine for milk cartons became unusable due to corrosion and fracture of a ring after only four weeks of operation of the machine in a Finnish milk packing plant. These bearings were subject to corrosion by water condensates...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001015
EISBN: 978-1-62708-217-4
... was to determine whether the hose failed during or before the accident. Fracture in the failed clamp was accompanied by obvious permanent deformation and evidence of local shearing at the ends of the perforation where fracture occurred, and in the adjacent perforation. The first test involved tightening the clamps...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
... Shear Bands in Controlled Penetration Impact , Int. J. Impact Eng. , Vol. 11 ( No. 3 ), 1991 , p 305 – 321 19. Xie J.Q. , Bayoumi A.E. , and Zbib H.M. , Analytical and Experimental Study of Shear Localization in Chip Formation in Orthogonal Machining , J. Mater. Eng. Perform...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001583
EISBN: 978-1-62708-217-4
... in shear angle of the overload region. The two specimens from “C” had shear angles of approximately 40–45 degrees, whereas the specimens fabricated by “A” had shear angles around 75–80 degrees. The regions of fatigue fracture were noticeably smaller on the “A” specimens, accounting for only approximately...
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
..., but at a lower overload level than intended. Corrective Measures The fatigue strength of the shaft was increased by shot peening the shear groove, and chatter in the machine was minimized. The relative extent of development of two torsional-fatigue cracks mutually at right angles can indicate...
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
... Materials.” It provides guidelines for presenting information other than just final data. Correction Factors for Test Data The available fatigue data are normally for a specific type of loading, specimen size, and surface roughness. For instance, the Moore rotating-beam fatigue-test machine uses...
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.chem.c9001470
EISBN: 978-1-62708-220-4
...Abstract Abstract One 49-in. impeller of a two-stage centrifugal air compressor disrupted without warning, causing extensive damage to the casings, the second impeller, and the driving gear box. Prior to the mishap, the machine had run normally, with no indications of abnormal vibration...
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
... and longitudinal fracture growth, shear lip formation, and ductile dimple rupture. Steel, 0.617 C, 0.025 S; tensile strength 342,000 to 458,000 psi. Magnification 60 times. In the laboratory, a 7 × 7 steel cable was pulled to failure by a tensile testing machine running at a crosshead displacement rate of 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
.... The potential failure modes are as follows. Possible Causes of Failure 1. Wrinkles and/or Secondary Shear Lines 2. Deficient Silica Phenolic Laminate Properties 3. Nozzle Insulator Structural Design Deficiency 4. Tape Angle Change 5. Deficiency Introduced by Process Changes A. Specifications...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001373
EISBN: 978-1-62708-215-0
... purposes. One of the valves failed by dezincification. The porous copper matrix could not sustain the clamping loads imposed by tightening the pressure relief fitting. The second valve failed by shear overload of the pressure relief fitting. Overload was facilitated by a reduction of cross-sectional area...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001100
EISBN: 978-1-62708-214-3
...Abstract Abstract Galvanized A36 steel unsleeved shear-type anchor bolts failed during installation. The galvanized steel bolts were approximately 18 mm (0.7 in.) in diameter with a 90 deg bend between the long and short legs. As-fractured, sawcut, and unfractured specimens were examined...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
.... The presence of localized necking and 45° shear lips to the direction of the applied load is evident of ductile failure in this region. Using a Vickers micro hardness machine, the Vickers hardness number measured on the electroformed material is 136.7 (±3). The hardness through the thickness of the Ni...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091096
EISBN: 978-1-62708-234-1
... to prevent damage to the gear train, had performed its function, but at a lower overload level than intended. The fatigue strength of the shaft was increased by shot peening the shear groove, and chatter in the machine was minimized. This article was adapted from the article “Fatigue Failures...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
.... , The Impact Wear-Resistance Enhancement Mechanism of Medium Manganese Steel and Its Applications in Mining Machines , Wear , Vol 376 , 2017 , p 1097 – 1104 10.1016/j.wear.2017.01.015 7. Rice S.L. , A Review of Wear Mechanisms and Related Topics , Proc. Int. Conf. on the Fundamentals...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... and with illustrative examples. Fatigue fracture in threaded fasteners and fretting in bolted machine parts are also discussed. The article provides a description of the different types of corrosion, such as atmospheric corrosion and liquid-immersion corrosion, in threaded fasteners. It also provides information...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... for the RCF of a homogeneous material surface. Fig. 1 Typical morphology of fatigue spall in rolling-element bearings. (a) Fatigue spall centered on a ball bearing raceway. (b) Fatigue spall on 12.7 mm (0.5 in.) diameter steel ball obtained using rolling four-ball machine Prediction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0091853
EISBN: 978-1-62708-223-5
..., a runner, and a heavy-duty motor. The frame and gravity feeder weighed over 200 kg (440 lb) and, in some areas, was over 25 mm (1 in.) thick. Gray cast iron is considered ideal for the machine frame and base, because it absorbs vibration and promotes smooth, quiet operation during grinding. To obtain...
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
... should be obtained rather than the failed part only. Second, the bearings and, if possible, the machine should be visually examined to determine the general condition of all related parts and the specific condition of the bearing components so that the type of damage can be identified. The bearing...