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hysteresis methods

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780211
EISBN: 978-1-62708-281-5
... elastic fracture toughness, testing of thin sheets and films, normalization methods, and hysteresis methods. fracture resistance testing polymers linear elastic fracture toughness J-integral testing thin sheets thin films normalization methods hysteresis methods POLYMERIC MATERIALS...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870123
EISBN: 978-1-62708-344-7
.... In this chapter, we regard the closure of a hysteresis loop as an “event.” A brief summary of these methods has been provided by the Society of Automotive Engineers ( Ref 6.1 ). A small problem develops when considering the actual closure of a hysteresis loop as the establishment of the event because the loop...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060083
EISBN: 978-1-62708-343-0
... Abstract This chapter compares and contrasts empirical approaches for partitioning hysteresis loops and predicting creep-fatigue life. The first part of the chapter presents experimental partitioning methods, explaining how they can be used to partition any loading cycle into its basic strain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
..., strain-range partitioning (SRP), several variants of the frequency-modified life equation, a hysteresis energy function, several variants of time- and cycle-fraction damage accumulation, methods based on crack- and void-growth considerations, damage mechanics, and a thermomechanical fatigue, oxidation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060155
EISBN: 978-1-62708-343-0
... available from the hysteresis loops. Whereas methods for treating multiaxiality on the basis of the Mises-Hencky relationships for the subcreep range make use of only the peak values of the equivalent stress and strain, the treatment in the creep range by SRP requires the entire hysteresis loop...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
... such damage rules and discusses their applicability in different situations. creep-fatigue test fatigue life hysteresis loops interaction damage rule life fraction rule microstructural damage strain-range partitioning STRAIN-RANGE PARTITIONING (SRP) is a unique and powerful method...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060069
EISBN: 978-1-62708-343-0
... Abstract This chapter demonstrates the versatility of the strain-range partitioning method and its application to creep-fatigue problems involving complex loading histories. It begins with a derivation showing that it is possible to assess the damage of hysteresis loops combining two or more...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870075
EISBN: 978-1-62708-344-7
... and their fatigue behaviors. It then discusses the challenge of developing hysteresis loops for complex loading patterns and accounting for effects such as ratcheting and stress relaxation. The sections that follow provide a summary of the various ways mean stress is described in the literature and the methods used...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870179
EISBN: 978-1-62708-344-7
... concentration factors and how they are determined for the general case and for specific geometries, materials, and surface conditions. The chapter covers both elastic and plastic fatigue behaviors as well as a wide range of methods. It also explains how small nuances in loading can introduce tensile...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870375
EISBN: 978-1-62708-344-7
... components. It also provides information on mechanical property and fatigue testing, the use of hysteresis energy to analyze fatigue, a procedure for inverting equations to solve for dependent variables, and a method for dealing with the statistical nature of failure. cyclic stress-strain test...
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Published: 01 July 2009
Fig. 8.20 Hysteresis loops for four bithermal loadings used to evaluate various predictive methods. (a) PP. (b) CC. (c) CP. (d) PC More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870009
EISBN: 978-1-62708-344-7
... are not of overriding importance, serves as a very appropriate substitute for a complete analysis. Manual Analysis Combining Rainflow with the Double-Amplitude Stress-Strain Curve While the method of Fig. 2.7 results in the determination of all closed hysteresis loops, and their relative locations, so...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060111
EISBN: 978-1-62708-343-0
... Abstract This chapter explains why it is sometimes necessary to separate inelastic from elastic strains and how to do it using one of two methods. It first discusses the direct calculation of strain-range components from experimental data associated with large strains. It then explains how...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... can be shown using stress-controlled experiments. Figure 3.6 shows typical hysteresis loops between fixed limits of stress. However, the strain-controlled method is considered most suitable for studying the cyclic stress-strain behavior ( Ref 3.6 ). Fig. 3.6 Schematic of cyclic softening...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870325
EISBN: 978-1-62708-344-7
... materials over quite a range of the life values. Method III: Use of the Cyclic Stress-Strain Relation Inherent in the Experimental Hysteresis Loops to Refine the Life Relations Because the approximations ε′ f ≈ ε f and σ′ f ≈ σ f are not always valid, the slopes of the elastic and plastic lines...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170614
EISBN: 978-1-62708-297-6
... and hysteresis loss for unalloyed iron. Induction B = 1 T (10 kG). Steel producers utilize raw materials and melting methods that provide impurity levels for those alloys guaranteed to provide a certain level of magnetic performance. In certain cases, particularly with fully processed silicon steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000131
EISBN: 978-1-62708-312-6
.... Source: Ref 3 . Reprinted with permission from MPIF, Metal Powder Industries Federation, Princeton, NJ Determination of the hysteresis curve (also called the B - H loop) is conveniently made using a ring or toroid specimen of the material. ASTM standard test method A 773M-01 describes one...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860203
EISBN: 978-1-62708-348-5
... hysteresis loop, a plot of B vs. H , shown in Fig. 6.6b . The two plots are related by Eqs. 6.1 and 6.5 . The plot of Fig. 6.6a represents the behavior of the material alone; parameters derived from it are often termed intrinsic parameters. The dashed lines indicate the first magnetization...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... Abstract This chapter discusses the selection, use, and integration of methods to control process variables in induction heating, including control of workpiece and processing temperature and materials handling systems. The discussion of temperature control includes a review of proportional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540383
EISBN: 978-1-62708-309-6
... and range-pair methods are most popular in the engineering community. The rain-flow method is widely used for identifying hysteresis loop closures, whereas the range-pair method is used for making fatigue life predictions with S-N curves. Each method has many versions, such as the loop closure routine...