Strain path dependent stiffness degradation of a loaded sheet

Vrh, Marko; Halilovic̆, Miroslav; Mišič, Martin; Štok, Boris

doi:10.1007/s12289-008-0343-2

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…The outcome of the t -test suggests that there is no evidence on the reduction of the E-modulus with plastic deformation. This evidence invalidates the claim made by researchers who relate the nonlinear unloading/reloading cycles and the reduction of chord modulus to damage ( Yeh and Cheng, 2003;Halilovi č et al, 2007;Vrh et al, 2008;Halilovi č et al, 2008;Vrh et al, 2011 ). Moreover, this further confirms the role of dislocations in the nonlinear behavior.…”

Section: Resultscontrasting

confidence: 55%

On the nonlinear anelastic behavior of AHSS

Torkabadi

Perdahcıoğlu

Meinders

et al. 2018

International Journal of Solids and Structures

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Section: Resultscontrasting

confidence: 55%

On the nonlinear anelastic behavior of AHSS

Torkabadi

Perdahcıoğlu

Meinders

et al. 2018

International Journal of Solids and Structures

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“…At this point the reader is invited to read our work [6] presented at the ESAFORM 2008 conference, which deals with the measurements of the stiffness degradation. Here, only some results will be summarized.…”

Section: Stifness Degradationmentioning

confidence: 99%

“…It is widely accepted, that elastic properties drop, when sheet is being subjected to loading into plastic region. In [6] we further investigate influence of the loading direction on the degradation of Young's moduli in different directions. First a special purpose tool was constructed to prestrain rectangular sheet plates of dimensions 500mmx500mm to a specific degree of the plastic strain.…”

Section: Stifness Degradationmentioning

confidence: 99%

Modelling of springback in sheet metal forming

Vrh¹,

Halilovic̆

Starman

et al. 2009

Int J Mater Form

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Springback, the phenomenon that is governed by strain recovery after removal of forming loads, is of great concern in sheet metal forming. There is no doubt that physically reliable numerical modelling of the forming process and predictions of springback obtained by respective computer simulations are crucial to control this problem. Unfortunately, by currently available approaches springback still cannot be adequately predicted in general. This paper is an attempt of building a corresponding constitutive model, which will simultaneously consider sheet anisotropy, damage evolution and strain path dependent stiffness degradation during metal forming. First, for the identification of the parameters in the built constitutive model a particular experimental procedure is deliberately developed. To solve the arisen inverse problem an optimization procedure is employed. The proposed approach to constitutive modelling is validated in the end by a simulation of the springback in the formed HSS steel. The simulation results prove to be in good agreement with the experimental ones. From the performed comparisons it is clearly indicated, that only simultaneous modelling of material properties can be the true key to obtain accurate prediction of springback in sheet metal forming.

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The sustainability of neural network applications within finite element analysis in sheet metal forming: A review

Jamli

Farid

2019

Measurement

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Strain path dependent stiffness degradation of a loaded sheet

Cited by 5 publications

References 5 publications

On the nonlinear anelastic behavior of AHSS

On the nonlinear anelastic behavior of AHSS

Modelling of springback in sheet metal forming

The sustainability of neural network applications within finite element analysis in sheet metal forming: A review

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