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forming limit curve

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400033
EISBN: 978-1-62708-316-4
... the development 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500273
EISBN: 978-1-62708-317-1
... curve. Forming limit diagrams for ISF were obtained by plotting the fracture strains obtained with various test shapes into a classic forming limit diagram, as shown in Fig. 13.13 . Fig. 13.13 Comparison of forming limit curves (FLCs) at necking and fracture and an FLC for the incremental sheet...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700151
EISBN: 978-1-62708-279-2
.... This translates into good formability at ambient temperatures. Austenitic stainless steel work hardens considerably and, therefore, can delay localized necking in stretched and deep-drawn applications. The forming limit curves of various austenitic stainless, DP, and mild steels are shown in Fig. 10.3...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500107
EISBN: 978-1-62708-317-1
... are more susceptible to shear fracture when the sheet material is stretched and bent simultaneously at a sharp die radius, as occurs in practical stamping operations ( Fig. 6.15 ). The conventional forming limit curve, used routinely for predicting fracture, is not always reliable in predicting fracture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
... bend radius and potential fracture under stretch bending conditions is an important and challenging task. This task is especially important in stretch bending of AHSS because potential fracture can be predicted by finite-element simulation but not by using forming limit curves that are routinely used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060117
EISBN: 978-1-62708-261-7
...) Forming limit curves for different sheet metals. Source: Adapted from Ref 6.7 Fig. 6.24 Various components produced by metal spinning. Courtesy of Leifeld USA Metal Spinning, Inc. Fig. 6.15 Range of products that can be produced with radial forging Fig. 6.34 Relative...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280091
EISBN: 978-1-62708-267-9
... to the plastic deformation of relatively thin pieces (sheet, plate) of superalloys to produce bends and/or shapes with curved surfaces. Forming processes include: Drawing Spinning Stretch forming Press-brake forming Formability and degree of work hardening (hardness or strength versus cold...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400005
EISBN: 978-1-62708-316-4
... Sheet material or blank Flow stress as a function of strain, strain rate, temperature, and microstructure Formability as a function of strain, strain rate, temperature, strain path, and microstructure (forming limit curves) Surface texture Thermal/physical properties (density, melting point...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500051
EISBN: 978-1-62708-317-1
... in thickness over the initial thickness at every time step or punch progression. The FLD shows the limiting in-plane strain beyond which failure would occur. If the strain calculated at any point in the formed part lies above the forming limit curve, the part is expected to fail, as shown in Fig. 3.1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940087
EISBN: 978-1-62708-302-7
... the behavior of a plot of Eq 3.58 (or equivalently, Eq 3.57 ) in the limits of very small and very large values of i ex,ox . It can be seen in the following analysis that Eq 3.57 has the form of the upper solid curve in Fig. 3.11 . Qualitatively, the initial part of the curve has a small slope because...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700071
EISBN: 978-1-62708-279-2
..., and presented in the form of an S - N curve where S is the stress amplitude and N is the number of cycles to failure. Figure 4.5 shows a typical S - N curve on which the location of the endurance limit, σ e , of the metal is superimposed. The endurance limit is the most important property...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060049
EISBN: 978-1-62708-261-7
...-copper alloy Fig. 3.4 Typical tension stress-strain curve for a ductile metal indicating yielding criteria. Point A is the elastic limit; point A′ is the proportional limit; point B is yield strength or offset (0 to C) yield strength; 0 is the intersection of the stress-strain curve...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060101
EISBN: 978-1-62708-355-3
... for steel For most low-carbon steels, the forming limit diagram has the same shape as the one shown in Fig. 2 , but the vertical position of the curve depends on the sheet thickness and the n value. The intercept of the curve with the vertical axis, which represents plane strain and is also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.9781627082792
EISBN: 978-1-62708-279-2
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700107
EISBN: 978-1-62708-279-2
... steel types. Source: Ref 6.3 Fig. 6.5 Fatigue curves for various types of CP steels. Source: Ref 6.2 Fig. 6.6 Forming limit diagrams for various CP steel types. Source: Ref 6.2 Fig. 6.7 Comparison of forming limit diagrams for mild steel, DP 600, and CP 800 steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940183
EISBN: 978-1-62708-302-7
... Fig. 5.1 Schematic representation of several forms of anodic polarization curves and associated potential decay curves following release of potentiostatic control Fig. 5.2 Pourbaix diagram for the system iron-water. Encircled numbers identify phase boundaries as identified...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.9781627083553
EISBN: 978-1-62708-355-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060013
EISBN: 978-1-62708-355-3
... the proportional limit. Determination of the elastic limit requires a tedious incremental loading-unloading test procedure. For this reason, it is often replaced by the proportional limit. Fig. 2 Typical tensile stress-strain curve for ductile metal indicating yielding criteria. Point A, elastic limit...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500083
EISBN: 978-1-62708-317-1
.... This feature is especially important in stamping and drawing operations. This phenomenon becomes more obvious when relatively complex parts are desired, because the forming limits are reached at very early stages of the forming operation. Also, the tendency toward galling increases at elevated temperatures...