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constant-amplitude loading

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540383
EISBN: 978-1-62708-309-6
.... crack growth fatigue life fatigue spectrum spectrum editing FEW STRUCTURAL APPLICATIONS involve only constant-amplitude load cycles throughout their intended service life. In a series of loading events commonly known as a “spectrum,” the loading cycles can be very irregular and of random...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
...) the brittle mechanisms found in acrylic bone cement The traditional total-life philosophy for fatigue life prediction is based on an endurance limit established from stress-log cycle plots, also known as S - N curves. In these tests, uncracked specimens are subjected to a constant amplitude load...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... on fracture mechanics analysis procedures and some other elements of fatigue analysis not yet mentioned here. Socie’s concept of crack initiation is described in Appendix 3 . Fatigue loading belongs to one of two categories: constant amplitude or variable amplitude (spectrum loading). Schematic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.9781627083096
EISBN: 978-1-62708-309-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... striation spacing due to the load amplitude A4-B1, preceded by three smaller striations corresponding to the load cycles of block A. The arrow indicates the crack propagation direction. Source: Ref 5.39 In this example, a loading block contains a total of 24 constant-amplitude stress cycles. All 24...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610147
EISBN: 978-1-62708-303-4
... necessary to approximate the strain-life curve from monotonic tensile properties. Fatigue tests are often conducted under simple conditions, such as constant amplitude and constant frequency. However, in real structures the loading conditions are rarely simple. Many structures are subjected...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
.... This area remains almost constant for a number of cycles and then increases significantly, as demonstrated clearly in Fig. 4 . This effect is attributed to the production and growth of crazes after some induction period. For ABS, an increase of stress amplitude causes the energy to dissipate per half-cycle...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240243
EISBN: 978-1-62708-251-8
... hysteresis loop for cyclic loading In cyclic strain-controlled fatigue, the strain amplitude is held constant during cycling. Since plastic deformation is not completely reversible, the stress-strain response during cycling can change, largely depending on the initial condition of the metal. The metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... regions are more significant in identifying the mode or type of failure—after the fact. Nonetheless, fatigue life can be significantly improved by eliminating or reducing the sources of fatigue crack initiation. Under usual loading conditions, fatigue cracks initiate near or at singularities that lie...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140193
EISBN: 978-1-62708-335-5
..., tensile stress-strain curves, monotonic and cyclic Al-Cu-Ni-Mg system. Tested at room temperature. Reference ASTM E 466 for cyclic force-controlled constant-amplitude fatigue test practices. UNS A02420 Source: John Deere Materials Data, Deere & Co., Moline, IL, p C13 Fig. D3.12 A332.0-T5...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400105
EISBN: 978-1-62708-316-4
... 8.1 ). The thickness is assumed to be constant during the process ( Ref 8.2 ). The process is capable of forming beverage cans, sinks, cooking pots, ammunition shell containers, pressure vessels, and auto body panels and parts. Deep drawing involves the use of presses having a double action...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
.... The advantages of this method are simplicity and ease of application, and it can offer some initial perspective on a given situation. It is best applied in or near the elastic range, addressing constant-amplitude loading situations in what has been called the long-life (hence, infinite-life) regime. Steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.9781627082815
EISBN: 978-1-62708-281-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540379
EISBN: 978-1-62708-309-6
... makes this approach rather complicated. However, this approach may be more reasonable than assuming a constant value for initiated crack size. References A3.1. Socie D.F. , Morrow J. , and Chen W.C. , A Procedure for Estimating the Total Fatigue Life of Notched and Cracked...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030117
EISBN: 978-1-62708-282-2
...  loss Quantity  of  impacting  erodent = C ⋅ F ( θ ) ρ υ 2 HV where C is a system constant, F (θ) is a function of the angle of impact, ρ is the density of the erodent, υ is the erodent velocity, and HV is the hardness of the target. Other refinements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110485
EISBN: 978-1-62708-247-1
...) As the effective spring constant (k) changes ( equation (1) ), there is a resultant change in the resonant frequency ( f 0 ) of the probe according to equation (2) assuming that the mass loading (m) remains constant: (2) f 0 = 1 2 π k m When the tip enters the range in which...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... the anodic area is relatively large compared with the cathodic area, the damage is spread out and usually negligible, but when the anode is relatively small, the metal loss is concentrated and may be very serious. On surfaces having some mill scale, the total metal loss is nearly constant as the anode...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700071
EISBN: 978-1-62708-279-2
... , of a panel is given by: S = CEwt 3 / 12 L 3 where C is the load distribution constant; E is the modulus of elasticity; and L, w , and t are length, width, and thickness of the panel, respectively. Because the modulus of elasticity of all steels is constant at 210 GPa...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720267
EISBN: 978-1-62708-305-8
... of high frequency alternating voltage on the transducer element. Simultaneously, the clock activates a time measuring circuit connected to the display device. The operator preselects a constant interval between pulses by means of a pulse repetition rate control on the instrument; pulses usually...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
... overload Fatigue Corrosion Wear Creep Visual, 1 to 50× (fracture surface) Necking or distortion in direction consistent with applied loads Dull, fibrous fracture Shear lips Little or no distortion Flat fracture Bright or coarse texture, crystalline, grainy Rays...