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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.c9001797
EISBN: 978-1-62708-241-9
.... It was shown both theoretically and experimentally that a cracked cam causes an overall reduction in stiffness. To further probe the effect, investigators derived an analytical formula expressing the time varying stiffness of a cam-follower system. They also succeeded in quantifying the relationship between...
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
... bearings machine fault misalignment structural materials vibration wear vibration analysis stiffness damping coefficient inertia steel (steel, general) References 1. Xu M. and Marangoni R.D. : “ Vibration Analysis of a Motor-Flexible Coupling System...
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
... for decarburization was detected through microhardness measurements. Table 3 summarizes the characteristics of the helical compressor springs. The spring rate or axial stiffness is calculated from: (Eq 1) k = G d 4 8 N a D m 3  in N / mm where D m is the mean spring diameter, d...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001576
EISBN: 978-1-62708-219-8
..., unlikly that the rotor resonates with the rotational frequency. Fig. 9 Frequency Responce of Rotor The rotor was confirmed to have sufficient stiffness. The motor connected directly to the rotor exhibited considerable stiffness. The casing, however, is made of 0.8 mm thick steel sheet and may...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001151
EISBN: 978-1-62708-219-8
... splices midway across the truss span. It should be noted that adjacent splices are prohibited by code as are splices near the midspan where loads are greatest. The failure of this truss will locally reduced the structural stiffness, allowing more deflection of the roof and more water ponding...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003550
EISBN: 978-1-62708-180-1
... different effects. Some chemicals act as plasticizers, changing the polymer from one that is hard, stiff, and brittle to one which is softer, more flexible, and tougher. Often these chemicals can dissolve the polymer if they are present in large enough quantity and if the polymer is not crosslinked. Other...
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
... are at a minimum. It also can excite low stiffness tructures such as lampshades and rocking chairs. The factory installed balancing devices to reduce the amount of force entering the ground from the conveyor systems that induced the highest offsite vibrations, consequently removing the “ghosts” from the community...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001314
EISBN: 978-1-62708-215-0
... was directed towards the influence of the stitch welding on the failure mode. The geometry of the tubing at the exit from the tank is relatively stiff, and the stitched tubing section is also relatively stiff. Any gross movement of the tubing near the exit would then be expected to occur in the three floating...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... for compound impact testing of titanium alloy RMI 5522S specimens against 17-4 PH stainless steel counterfaces (impact stress 18.6 MPa). Source: Ref 20 Specimen stiffness affects the wear rate of both impacting bodies ( Ref 21 ). As shown in Fig. 12 , the short, stiff specimen wore the counterface...
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
...-Performance Alloys , Vol 1 , ASM Handbook , ASM International , 1990 , p 277 – 288 . 10.31399/asm.hb.v01.a0001017 Wire ropes are among the most frequently used mechanical devices in industrial applications. This is due to their high tensile load capacity, low bending stiffness, and high strength...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001606
EISBN: 978-1-62708-226-6
... designs are shown in Fig. 4 (a) and (b) . Because the model was linear elastic, the stresses can simply be scaled according to the displacement. In this situation, the displacements of the structure and the stiffness of the materials determine the stresses that develop in the structure. It is evident...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
... to 100 °C (212°F) in 17 s, for a total thermal cycle of 47 s. By keeping the stroke constant, stiff restraints were imposed on the specimen by means of a servohydraulic universal testing machine. The stress resulting from this restraint was increased by an additional monotonic tensile stress. The applied...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... modes (and associated resonant frequencies) that depend on the structural stiffness (mechanical properties and geometry), density, applied loading (or existence of a residual or pre-stress), and boundary conditions. Although a structure may have normal modes spread over a wide frequency range, FEA...
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
... concentration for some of the bolts. Moreover, the stiffness of the base carrier attached to the slewing ring should be increased. Although only a slight decrease in stress was obtained by using a vibrohammer, its use may be advantageous under other hoisting conditions. The fractured surfaces of some...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001634
EISBN: 978-1-62708-221-1
...” in the coupling. The area between the outer ferrule and the hose acts as a “crevice-like” region that can trap moisture and promote corrosion. This is the area on the hose that experiences the maximum stresses due to flexing and impulse. This is due to the change in stiffness in the transition between...
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
.... Rice S.L. , Nowotny H. , and Wayne S.F. , The Role of Specimen Stiffness in Sliding and Impact Wear , Wear , Vol 77 ( No. 1 ), 1982 , p 13 – 28 10.1016/0043-1648(82)90041-2 25. Yang Y. , Fang H. , Zheng Y. , Yang Z. , and Jiang Z. , The Failure...
Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001412
EISBN: 978-1-62708-229-7
... an important contribution to the cause of failure. In regard to this question of vibration, it must be remembered that the vibration of a group of blades would be influenced by the rigidity of their anchorage in the wheel rim, this factor determining the stiffness of the vibrating system. A decrease...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... head stiffness. It should be mentioned that until 300 h of the endurance test, fuel type was gasoline and then changed to compressed natural gas (CNG) type. As a result, the mean power of the engine increased from 100 to 110 kW, which can be a cause of higher thermal stresses. Fig. 1 Cracked...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001149
EISBN: 978-1-62708-232-7
... thermal expansion of the duct was improperly restrained by welding stiff reinforcing rings on the outside of the duct as shown on Fig. 10 . Moreover, the rings were 0.26 meter (10.275 in.) wide and welded on both sides so that the thermal axial expansion under the rings also introduced large stresses...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001646
EISBN: 978-1-62708-219-8
... rope is dependent on the strengths of the individual constituent wires and their arrangement inside the rope. The construction of a wire rope also has an important bearing on its application; the geometric arrangement of wires in the rope influences the internal fretting of wires, rope stiffness...