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pure plastic bending

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Published: 01 December 1995
Fig. 6-5 Rectangular beam subjected to pure bending. (a) Elastic stress distribution. (b) Assumed lower bound stress distribution for plastic collapse More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630071
EISBN: 978-1-62708-270-9
... to final fracture. This necking phenomenon occurs in the plastic region, which means that the deformation is irreversible. Of course, plastic—or permanent—deformation is characteristic of any single-load fracture of a ductile metal. Fractures of ductile metals stressed in pure tension originate near...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
... analysis During a bending operation, the outer fibers of the sheet metal are stretched while the inner fibers are compressed. Furthermore, during bending additional deformation mechanisms, such as tension and shear, may occur. Simplified bending theory (or pure bending with a constant bending moment...
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
.... The neutral axis may or may not be at the geometrical center, although there must be zero stress at some location in the cross section. Fig. 4 Elastic stress distribution: pure bending. T, tension. C, compression. (a) No stress concentration. (b) Transverse surface stress concentrations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540001
EISBN: 978-1-62708-309-6
... Abstract This chapter reviews the fundamentals of stress, strain, and deformation and demonstrates some of the tools and techniques used to analyze how materials and structures respond to tension, compression, bending, and shear. It begins with an overview of the behavior of perfectly elastic...
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
...), the dimples are essentially round and equiaxed because of the tensile stress at that location, as shown at the bottom center portion of Fig. 9(a) and (b) . In pure bending, the fracture starts on this convex side and progresses across the part to the opposite side, which acts as a hinge as the fracture...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870157
EISBN: 978-1-62708-344-7
... Abstract This chapter deals with the effects of fatigue in rotating shafts subjected to elastic and plastic strains associated with bending stresses. It begins with a review of the basic approach to treating low-cycle fatigue in bending, explaining that the assumption that stress...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420085
EISBN: 978-1-62708-452-9
... Abstract This chapter presents a detailed discussion on the three most frequent gear failure modes. These include tooth bending fatigue, tooth bending impact, and abrasive tooth wear. Tooth bending fatigue includes surface contact fatigue (pitting), rolling contact fatigue, contact fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400033
EISBN: 978-1-62708-316-4
... and use of forming limit curves and the extensive amount of information they provide. anisotropy flow stress formability forming limit curves plastic deformation sheet forming tensile test WHEN A MATERIAL is deformed, two types of deformation occur: elastic and plastic. The elastic phase...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500107
EISBN: 978-1-62708-317-1
... Abstract This chapter discusses the forming characteristics of dual-phase (DP) and transformation-induced plasticity (TRIP) steels. It begins with a review of the mechanical behavior of advanced high-strength steels (AHSS) and how they respond to stress-strain conditions associated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200083
EISBN: 978-1-62708-354-6
... of resultants of the assumed internal stress distribution is a lower bound estimate of the plastic collapse load. As an example, consider the rectangular beam subject to pure bending in Figure 6-5 . In the elastic range the longitudinal stress varies linearly with distance from the neutral axis. Yielding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400005
EISBN: 978-1-62708-316-4
... Abstract This chapter provides a concise, design-oriented summary of more than 30 sheet forming processes within the categories of bending and flanging, stretch forming, deep drawing, blank preparation, and incremental and hybrid forming. Each summary includes a description and diagram...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... categories of wear, scuffing, plastic deformation, contact fatigue, cracking, fracture, and bending fatigue. Each of these failure modes are described in the AGMA gear failure nomenclature publication ( Ref 2 ). Gear failure nomenclature recommended by the American Gear Manufacturers Association (AGMA...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610101
EISBN: 978-1-62708-303-4
... stress. Thus, the plastic enclave for a thick specimen will have a larger plastic zone at the edges, due to plane-stress conditions, than in the middle, which is under pure plane-strain conditions ( Fig. 7 ). Fig. 7 Plastic zone formation at crack tip. Source: Ref 2 Size Effect A two...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740163
EISBN: 978-1-62708-308-9
... Abstract This chapter describes sheet metal forming operations, including cutting, blanking, piercing, and bending as well as deep drawing, spinning, press-brake and stretch forming, fluid forming, and drop hammer and electromagnetic forming. It also discusses the selection and use of die...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400233
EISBN: 978-1-62708-316-4
... in the neutral plane. Metal flow takes place within the plastic range of the metal, so that the bent part retains a per- manent set after removal of the applied stress. The cross section of the bend inward from the neutral plane is in compression; the rest of the bend is in tension. See also bending stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... was tested in essentially pure rolling, a steep-sided, irregularly shaped pit was formed, and the test was stopped. The extremely high force needed to cause subsurface pitting is shown by the plastic deformation at the sides of the wear track formed by the mating roller, which was 5 in. in diameter...
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
... fatigue data. It compares the Gerber, Goodman, and Soderberg methods for predicting the effect of mean stress from bending data, describes the statistical nature of fatigue measurements, and explains how plastic strain causes cyclic hardening and softening. It discusses the work of Wohler, Basquin...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730059
EISBN: 978-1-62708-283-9
... and emitting photons. This explains the metallic luster. Most metals are strong and ductile. They deform plastically because their atomic planes slip over one another, as illustrated in Fig. 6.1 . Metals such as copper, aluminum, iron, titanium, magnesium, and nickel are very ductile. Other metals...