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torsional deformation

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410315
EISBN: 978-1-62708-265-5
.... It then explains how wire drawing, patenting, and the Stelmor process affect microstructure, and describes various fracture mechanisms and how they appear on steel wire fracture surfaces. The chapter concludes by discussing the effects of torsional deformation, delamination, galvanizing, and aging on patented...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630071
EISBN: 978-1-62708-270-9
.... The bright, transverse fracture and lack of deformation characterize a brittle fracture. When a cylinder is twisted in pure torsion, the stress system characteristic of tension loading rotates 45° in one direction or the other, depending on which way the shaft is twisted. When twisted as shown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270122
EISBN: 978-1-62708-301-0
... microscopes, was flat and shiny with deformation marks and dimples, typical of torsional overload, and signs of severe rubbing on the periphery. Based on their observations, investigators concluded that the quill shaft failed by torsional overload, the source of which could not be determined. quill...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270124
EISBN: 978-1-62708-301-0
... that a considerable amount of rubbing occurred after the shaft broke. SEM fractography revealed deformation marks and elongated dimples, typical of shear overloads, along with other details. Based on their analysis, investigators concluded that the cardan shaft failed under torsional overload. They also cited a need...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270130
EISBN: 978-1-62708-301-0
... on the fracture surface of bolt No. 4 Bolt No. 6 showed clear indication of single torsional overload failure. Twisting deformation marks at the periphery, with the final region of fracture close to the center of the bolt, is typical of torsional overload failure ( Fig. CH28.4a ). Scanning electron...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130087
EISBN: 978-1-62708-284-6
... or actual physical limitations. The alternative to gradual onset of deformation is sudden onset. Examples of sudden onset deformation are buckling instability in compression of columns or torsion of tubes. A roof truss that collapses under a snow load is such an example. Roof trusses are not usually...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... the crack is opened by a tensile stress of sufficient magnitude, the crack tip deforms plastically, extending the crack and slightly blunting the tip on a microscopic scale, as in Fig. 4 . On crack closure, the crack tip sharpens and the process repeats, creating a series of striations across the fracture...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610025
EISBN: 978-1-62708-303-4
... shafts or tubes. In torsion, each element of the material deforms in pure shear, as shown in Fig. 22 . The shear strain (γ) in an element is given by: (Eq 30) γ = r θ / L where r is the radial position of the element, θ is the twist angle, and L is the specimen length. The shear stress...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630023
EISBN: 978-1-62708-270-9
..., assembly, or permanent deformation—that may also be present in the part. Thus, the true resultant stress in any orientation at any location is the algebraic sum of both the applied and the residual stresses, as discussed in Chapter 4, “Residual Stresses,” in this book. It is for this reason that it also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... Abstract This chapter examines the phenomena of deformation and fracture in metals, providing readers with an understanding of why it occurs and how it can be prevented. It begins with a detailed review of tension and compression stress-strain curves, explaining how they are produced and what...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630063
EISBN: 978-1-62708-270-9
... of a body-centered cubic structure, shaded to show (a) the diagonal plane along which shear deformation and eventual fracture can occur and (b) one face of the cell, the site of the cleavage mode of fracture References 1. Bridgman P.W. , Fracture and Hydrostatic Pressure...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.9781627082709
EISBN: 978-1-62708-270-9
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 December 2006
DOI: 10.31399/asm.tb.ex2.t69980141
EISBN: 978-1-62708-342-3
... is—for the same temperature and the same deformation rate—dependent on the deformation conditions. For example, in a tensile test the toughness defining elongation to fracture is relatively low, but in the torsion test in which the deforming elements are subjected to other forces, it can be higher. In particular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540001
EISBN: 978-1-62708-309-6
... and loading conditions. elastic properties plastic deformation properties shear and torsion properties solid mechanics stress analysis ENGINEERING MATERIALS can be conveniently grouped into five categories: metals and alloys, intermetallics, ceramics and glasses, polymers (plastics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040025
EISBN: 978-1-62708-300-3
... Abstract This chapter explains how to determine flow stress and forgeability using data from tensile tests, compression tests, ring tests, and torsion tests. It describes sample preparation, tooling and equipment, test procedures, error sources, and data plotting techniques. It also provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630101
EISBN: 978-1-62708-270-9
... Abstract Ductile fracture results from the application of an excessive stress to a metal that has the ability to deform permanently, or plastically, prior to fracture. Careful examination and knowledge of the metal, its thermal history, and its hardness are important in determining the correct...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240201
EISBN: 978-1-62708-251-8
... fabrication and later when placed in service, are subjected to forces or loads. So that excessive deformation or failure does not occur, it is important to know what effects these loads have on the part. The mechanical behavior of a material is its response to an applied load or force. Important mechanical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410499
EISBN: 978-1-62708-265-5
... of LTT martensite with increasing carbon content, as described in Chapter 18, “Deformation, Mechanical Properties, and Fracture of Quenched and Tempered Carbon Steels.” In the Ochi and Koyasu work, all torsion fractures of induction-hardened steel containing less than 0.6% C were mode III shear...