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slip-line field analysis

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Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005461
EISBN: 978-1-62708-196-2
... Abstract This article discusses physical analysis, including slab method and upper-bound method and slip-line field analysis, for calculating stress states in plastic deformation processes. It presents various validation standards and models for evaluating the criterion of fracture for use...
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Published: 01 December 2009
Fig. 12 Prediction of central burst in wire drawing by the tensile stress criterion and slip-line field analysis (solid line) of double indentation. The range of predictions by upper-bound analysis ( Fig. 8 ) is shown by dashed lines. Source: Ref 25 More
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Published: 01 January 2005
Fig. 23 Prediction of central burst in wire drawing by the tensile stress criterion and slip-line field analysis of double indentation. The range of predictions by upper bound analysis ( Fig. 19 ) is shown by dashed lines. More
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Published: 01 January 2005
Fig. 22 Variation of the normalized indentation pressure ( P/Y where Y is the yield strength) and the normalized centerline hydrostatic stress (σ h / Y ) with h/b ratio as calculated from slip-line field analysis More
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Published: 01 January 2005
Fig. 26 Variation of the normalized pressure ( p /σ 0 , where σ 0 is the flow stress) and the normalized centerline hydrostatic stress (σ m /σ 0 ) with h / b ratio. Calculated from slip-line field analysis More
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Published: 01 December 2009
Fig. 10 Variation of the normalized indentation pressure ( P / Y , where Y is the yield strength) and the normalized centerline hydrostatic stress (σ h / Y ) with h / b ratio as calculated from slip-line field analysis. Source: Ref 25 More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009004
EISBN: 978-1-62708-185-6
... Criterion The role of tensile stress in fracture is implicit yet overwhelmingly clear throughout the discussion of fracture and fracture criteria. The calculation of tensile stresses in localized regions, however, requires the use of advanced plasticity analysis methods such as slip-line fields...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005455
EISBN: 978-1-62708-196-2
... to ±[ b × u ], where b is the Burgers vector and u the dislocation line direction. Mixed dislocations will also have components of both types of strain field, with their respective magnitudes depending on the angle between their Burgers vector and line direction. Regarding the strain fields about...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005503
EISBN: 978-1-62708-197-9
... in the component. Consequently, a weld line reduces the strength of the green component and leaves an undesirable surface appearance. It should be avoided when possible. The results from the computer analysis are used to predict the weld line location. Air trap or air vent is a defect caused by air that is caught...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003270
EISBN: 978-1-62708-176-4
... with dislocation movements under the action of stresses, which appear on the metal surface, or the dislocation images observed as lines in transmission electron microscopy. Fig. 2 Slip-line field solutions for a flat-ended, two-dimensional punch having a width 2 a. (a) Prandtl's flow pattern. Flow...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0009224
EISBN: 978-1-62708-176-4
... . Theory The currently adopted explanation of indentation hardness is given in terms of the so-called slip line field theory ( Ref 1 ). According to this theory, the material beneath a punch flows plastically over a region consistent with the material displaced by the punch. At all other points...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006430
EISBN: 978-1-62708-192-4
.... , Motor Current Signature Analysis to Detect Faults in Induction Motor Drives – Fundamentals, Data Interpretation, and Industrial Case Histories , Proceeding of the Thirty-Second Turbomachinery Symposium , Houston, Texas , 2003 , 145 – 156 • Thomson W.T. , On-Line Motor Current Signature...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005526
EISBN: 978-1-62708-197-9
... pin, the interaction between the pin and the workpiece is very complex. It has been observed that a three-dimensional material flow field exists in FSW ( Ref 30 , Ref 31 , Ref 32 ). The pin, whether threaded or not, relocates the base material when it advances along the joint line. Again, large...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003316
EISBN: 978-1-62708-176-4
... line contact stress than small-diameter cylinders ( Ref 24 ). This may be caused by increased partial slip or more asperity contacts per stress cycle. Nowell and Hills ( Ref 15 ) looked at the effect of slip amplitude through elastic modeling of fretting fatigue in the partial-slip regime. In low...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002372
EISBN: 978-1-62708-193-1
... for convex contacts using the elastic stress analysis of a sphere pressed into a plate by Mindlin ( Ref 6 ) ( Fig. 3 ). The normal (Hertzian) stress field is an elliptical distribution with the maximum stress occurring under the center of the contact. The shear stresses, which promote relative slip...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009006
EISBN: 978-1-62708-185-6
... and Cockcroft ( Ref 12 ) and Hoffmanner ( Ref 13 ) have employed slip-line fields for plastic-flow analysis, whereas Chen, Oh, and Kobayashi have employed the matrix method ( Ref 14 , Ref 17 ). The projections of Hoffmanner are typical of the results of these efforts and are shown in Fig. 6 . The ordinate...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005413
EISBN: 978-1-62708-196-2
... of the moving dislocations, avalanches of dislocations of the same species are created, which form narrow (a few nanometers wide) slip lines at the sample surface along the trace of a slip plane. An individual slip line is active only for a short time and must be replaced by activation of a new one...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003742
EISBN: 978-1-62708-177-1
... and crystallographic texture are the key material features used in the continuous endeavor to relate the processing of a metal with its final properties. Fig. 1 (a) Optical micrograph of a slip-line pattern in polycrystalline iron from the late 19th century. Source: Ref 1 . (b) Transmission electron micrograph...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003744
EISBN: 978-1-62708-177-1
... deformation until stable orientations are achieved for the given deformation state. These stable orientations become the preferred orientations in the final product. A similar analysis can be made when deformation occurs by twinning. While slip occurs simultaneously on many slip systems in polycrystalline...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
.... The article discusses the common testing techniques and process variables for workability prediction. It illustrates the simple and most widely used fracture criterion proposed by Cockcroft and Latham and provides a workability analysis using the fracture limit line. The article describes various workability...