Creep and anelasticity in the springback of aluminum

Wang, Jeff; Wagoner, R. H.; Carden, W.D; Matlock, David K.; Barlat, Frédéric

doi:10.1016/j.ijplas.2004.05.008

Cited by 58 publications

(31 citation statements)

References 25 publications

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“…In agreement with previous work by Wang et al [1], the tested conventional steels, AKDQ, DQSK, and HSLA steels, did not show any time-dependent behavior for 6 months after forming. However, all tested AHSSs showed angle changes after forming.…”

Section: Time-dependent Springbacksupporting

confidence: 93%

“…Prediction and compensation of springback are important to achieve precise final part shape to avoid assembly problems. In previous work, aluminum alloys were observed to change shape for long periods after draw-bend tests [1,2]. Several autobody steels were reported to have no such time-dependent behavior following similar forming and unloading [2].…”

Section: Introductionmentioning

confidence: 99%

“…Several autobody steels were reported to have no such time-dependent behavior following similar forming and unloading [2]. Wang et al [1] suggested two possible underlying mechanisms for the time-dependent springback in aluminum alloys; room temperature creep and anelasticity. Experimental results showed that creep plays a dominant role in long term time-dependent springback in aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

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Time-dependent Springback

et al. 2008

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Section: Time-dependent Springbacksupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time-dependent Springback

et al. 2008

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“…Matlock et al [17][18][19][20] realizan numerosos trabajos experimentales en los que determinan el springback de ensayos de doblado bajo tensión, estudiando la influencia de numerosos factores sobre la magnitud de este fenómeno: tensión a tracción, anchura de las muestras dobladas y relación r/t. En la zona de doblado consideran la longitud de arco en contacto con el cilindro, mientras que en la zona de doblado y estirado toman como longitud de arco la longitud de estirado, constante para todos los ensayos.…”

Section: Rev Metal 49 (3)unclassified

Evaluación del springback mediante ensayos de doblado bajo tensión en condiciones de multiaxialidad típicas de los procesos de embutición profunda. Aplicación a chapa de acero inoxidable AISI 304 DDQ

Miguel¹,

Coello²,

Martínez³

et al. 2013

REVMETAL

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In this paper, a methodology has been developed for evaluating the springback of AISI 304 DDQ stainless steel sheet based on a bending under tension test. The main difference of the methodology herein carried out is that tests are made under the multiaxial stresses state that take place in deep drawing processes. This affects to the level of stress value in the test and to the hardening state of the sheet. Springback evaluation has been done in two different areas. Bending area has been evaluated from elastic recovery ratio defined as the ratio between the bending radius after and before bending. Bending and unbending extreme has been studied from the measured curvature radius in this area and taking into account the geometric equivalence of the test with the drawing cups process. Results found allow to state that drawing ratio or deformation ratio have a negligible influence on the springback into the range of values experimented here. Bending radius has hardly influence as well while bending angle is the most significant variable. The results obtained are compared to those measured in deep-drawn cups, finding a great agreement.

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“…Zhu et al [20] examined the time-dependent inelastic deformation of the aluminum alloy AA 5182-H19 during the manufacturing process and under inservice conditions. Based on previous springback measurement, Wang et al [21] revealed that the specimen shapes of aluminum alloys could continue to change for long periods following forming and unloading. Lim et al [22,23] studied time-dependent springback behaviors of four advanced highstrength steels which measured and creep-simulated for various test conditions.…”

Section: Introductionmentioning

confidence: 99%

A novel model to predict U-bending springback and time-dependent springback for a HSLA steel plate

Jiang

Dai

2015

Int J Adv Manuf Technol

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In this paper, a novel model which considers initial strain related to the material's yielding stress, the combination of stretch and bending strain and isotropic hardening rule is introduced to predict U-bending springback and timedependent springback behaviors for a high strength and low alloy (HSLA) steel plate. It is noteworthy that time-dependent springback is associated with plastic strain hardening for the HSLA steel plate. The results obtained from the performed analysis show that the hardening exponent, bending radius and thickness ratio, friction coefficient, and blank holder force have great influences on the springback angle and stress level. Based on this novel model, the prediction of HSLA steel plate's springback is done in the stage of tool design and hence, the accuracy of drawn part is increased.

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Creep and anelasticity in the springback of aluminum

Cited by 58 publications

References 25 publications

Time-dependent Springback

Time-dependent Springback

Evaluación del springback mediante ensayos de doblado bajo tensión en condiciones de multiaxialidad típicas de los procesos de embutición profunda. Aplicación a chapa de acero inoxidable AISI 304 DDQ

A novel model to predict U-bending springback and time-dependent springback for a HSLA steel plate

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