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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0089254
EISBN: 978-1-62708-225-9
.... The device is used to attach a chain sprocket to a shaft without the use of a locking key, enabling the shaft to either drive or be driven anywhere on the shaft (see Fig. 1 ). The configuration consists of an assembly of four tapered rings ( Fig. 2 ) that are retained by a series of cap screws. As shown...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
... molding, compression molding, transfer molding, hand lay-up process, casting, and additive manufacturing. compounding operations dies extruder extrusion molding injection molding mixing molds process troubleshooting product design screw extruder thermoforming webline handling Extrusion...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006912
EISBN: 978-1-62708-395-9
...: A neoprene rubber gasket could exude plasticizer when compressed and cause stress cracking in plastic parts such as polycarbonate ones. Residual machine cutting oils left on screws could even cause bosses to crack. Bosses are constantly under stress and are sometimes subjected to vibration and higher...
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
... 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 on stress...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... periodically; another is the FQA registry published by the U.S. Patent and Trademark Office. Given the information on the source of fasteners that may be at issue, the failure analyst may confirm whether they were installed at the time of original manufacture of a machine or whether they were replacements...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001388
EISBN: 978-1-62708-215-0
... truck cranes are generally subjected to severe cyclic loading in service. Circumstances Leading to Failure When steel piles being driven into the ground at a construction site were drawn out using a truck crane with a hoisting capacity of 300 kN (34 tonf), the crane suddenly collapsed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
... completed under controlled laboratory conditions [ 3 – 5 ]. However, it is considered a difficult task to identify SCF even under controlled conditions. Identifying component failures under complex operating conditions in a rotating machine is certainly a challenging task. The relevant operating data may...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... of a locking key, enabling the shaft to either drive or be driven anywhere on the shaft (see Fig. 9 ). The configuration consists of an assembly of four tapered rings ( Fig. 10 ) that are retained by a series of cap screws. As shown in Fig. 11 , when the screws are tightened, the middle wedge-shaped rings...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
.... The device is used to attach a chain sprocket to a shaft without the use of a locking key, enabling the shaft to either drive or be driven anywhere on the shaft ( Fig. 8 ). The configuration consists of an assembly of four tapered rings ( Fig. 9 ) that are retained by a series of cap screws. As shown in Fig...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... and did reduce the microscope vibrations to an acceptable level. Case #4: Torsional Vibration on a Reciprocating Pump A 66 rpm reciprocating water pump driven by a gear box and belt reduction experienced excessive torsional vibration that was being picked up at the gear case when the pump...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... to be self-evident, for example, damage of a car body in a collision or bending of a nail being driven into hard wood. However, the failure analyst is often faced with more subtle situations. For example, the immediate cause of distortion (bending) of an automobile-engine valve stem is contact of the valve...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
... may differ somewhat among the different classes of material. Distortion failures are ordinarily considered to be self-evident, for example, damage of a car body in a collision or bending of a nail being driven into hard wood. However, the failure analyst is often faced with more subtle situations...
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
... concentration either inherent in design or introduced during fabrication or operation. Design features that concentrate stress include ends of keyways, edges of press-fitted members, fillets at shoulders, and edges of oil holes. Stress concentrators produced during fabrication include grinding damage, machining...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001768
EISBN: 978-1-62708-241-9
... 87.3 87.4 86.6 85.4 86.4 Edge 2 87.5 85.5 86.6 Tensile testing was carried out in a 100 kN capacity ‘INSTRON 1195’ model screw driven mechanical testing machine using flat test specimens of 25 mm gauge length (GL) and gauge width 6.25 mm. The tensile test specimens for the aforesaid...
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
... tools. Using high-speed photography, these researchers determined that the velocity of a hammer head striking 16-penny nails being driven into wood by an experienced carpenter was 14 m/s (45 ft/s), and, furthermore, when striking a hammer against a steel anvil in a deliberate attempt to cause spalling...
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
... of mechanical loads, shock, vibrations, or thermal gradients, should be considered. The method of connecting the driving or driven member to the shaft, such as interference fitting, welding, or use of a threaded connection, a set screw, or a keyway, can influence failure. It is also important if power...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
.... Examples 1 and 2 illustrate uncomplicated types of ductile overload failures. Example 1: Fracture of High-Strength Screws during Installation. One lot of size M5 × 0.8 mm, class 8.8 metric screws with a proprietary head design were failing during application. The screws were reportedly failing...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006916
EISBN: 978-1-62708-395-9
... to the conventional injection molding approach, the scientific injection molding approach is a data-driven, systematic approach to developing a robust process by focusing on process physics, polymer chemistry, and rheological properties of the material. Product failures are minimized due to improved efficiencies...