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springback
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Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005131
EISBN: 978-1-62708-186-3
... Abstract Springback refers to the elastically driven change of shape that occurs after deforming a body and then releasing it. This article presents an introduction to the concepts of springback simulation as well as recommendations for its practice in a metal forming setting of thin beams...
Abstract
Springback refers to the elastically driven change of shape that occurs after deforming a body and then releasing it. This article presents an introduction to the concepts of springback simulation as well as recommendations for its practice in a metal forming setting of thin beams or sheets. It discusses bending with tension and more complex numerical treatments. The article addresses the limitations of the various assumptions followed in springback simulation. It provides a discussion on the design of dies and tooling using an assumed springback prediction capability.
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in Aluminum-Lithium Alloys
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 29 Average springback from 90° bend of aluminum-lithium alloy 8090 and two conventional alloys. All three alloys were tested in the as-received condition.
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in Beryllium-Copper and Other Beryllium-Containing Alloys
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 6 Angular springback of heat-treatable and mill-hardened tempers of beryllium-copper C17200 and beryllium-nickel N03360 strip (90° V-block plane-strain bends)
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Published: 01 August 2013
Fig. 10 Comparison of springback angle between Q&P 980 and DP 980 using the bending-under-tension test
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Published: 01 January 2006
Fig. 17 Effect of ratio of punch radius to work metal thickness on springback in the press-brake bending of Ti-6Al-4V at two temperatures
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Published: 01 January 2006
Fig. 7 Springback of a beam in simple bending. (a) Elastic bending. (b) Elastic and plastic bending. (c) Bending and stretching
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Published: 01 January 2006
Fig. 3 Effect of various approximations ( Eq 9 , and 26 ) on simulated springback quantities. (a) Springback. (b) Springback ratio. R , radius of primary bending curvature; r , radius of curvature after springback; ε p , plastic strain; FEM, finite element modeling; t , thickness. CPS8
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Published: 01 January 2006
Fig. 10 Effect of sheet tension on springback for an elastic, perfectly plastic constitutive equation for low-strength steel. (a) Constant thickness. (b) Changing thickness. r , radius of curvature after springback; R , radius of primary bending curvature; t , sheet thickness; E , Young's
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Published: 01 January 2006
Fig. 11 Role of normalized sheet tension and bend radius on springback for elastoplastic, hardening behavior ( Eq 58 and 59 ) of low-strength steel ( Eq 26 ). See Eq 7 , and 59 . r , radius of curvature after springback; R , radius of primary bending curvature; t , sheet thickness
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Published: 01 January 2006
Fig. 13 Effect of strain approximation on springback calculation. See text for definition of variables.
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Published: 01 January 2006
Fig. 17 Sensitivity of simulated draw-bend springback to mesh size ( N EL ) and number of through-thickness integration points ( N IP ). (a) Nonphysical springback predictions obtained using typical sheet-forming simulation parameters. (b) Accuracy of selected springback solutions depending
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Published: 01 January 2006
Fig. 18 Fractional error of computed moment (or springback) using trapezoidal integration and 51 integration points ( N IP ) through the thickness. The limiting error (i.e., the assured maximum error in the vicinity of a set of conditions) is shown as smooth curves, and the maximum error
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Published: 01 January 2006
Fig. 22 The role of finite element type on draw-bend springback prediction. (a) Results for various R / t (bend radius/sheet thickness). (b) Results for various F b (normalized back force). Δθ, springback angle; DQSK, drawing quality special killed; μ, friction coefficient
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Published: 01 January 2006
Fig. 24 Simulated role of plasticity in springback for a draw-bend test. (a) Difference of springback angle (Δθ) for pure-elastic and elastoplastic springback simulations. (b) Differences in through-thickness stress distribution following pure-elastic and elastoplastic springback. R / t
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Published: 01 January 2006
Fig. 26 The role of numerical procedures and constitutive modeling in springback accuracy as represented by standard error of fit,<σ>, to measurement. Springback angles (Δθ): (1) Plane stress, 5 integration points ( N IP ), 600 elements along length ( N EL ), von Mises yield
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Published: 01 January 2006
Fig. 50 Boundary conditions for the springback analysis of the automotive underbody cross-member panel
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Published: 01 January 2006
Fig. 51 Predicted displacement magnitude after springback of the automotive underbody cross-member panel
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Published: 01 January 2006
Fig. 52 Predicted effective stress contour (a) before and (b) after springback of the automotive underbody cross-member panel
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