A phenomenological plasticity model with non-normality effects representing observations in crystal plasticity

Kuroda, Mitsutoshi; Tvergaard, Viggo

doi:10.1016/s0022-5096(00)00080-6

Cited by 95 publications

(64 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several authors conclude that shear bands initiate at points of strain concentration induced by initial thickness heterogeneity [7,52,53]. Other authors have analyzed the effects of thermal softening on shear banding.…”

Section: Hemming Of Aluminum Automotive Sheetsmentioning

confidence: 99%

“…Other authors have analyzed the effects of thermal softening on shear banding. Crystal plasticity simulations have also been used, essentially to analyze the effect of particular textures on the formability and bendability of sheet metal [28,52,[54][55][56]. Probably the chief consensus of these studies is the close relationship between surface roughening and strain localization.…”

Section: Hemming Of Aluminum Automotive Sheetsmentioning

confidence: 99%

See 1 more Smart Citation

Aluminum Sheet Metal Damage Mechanisms Application to Trimming and Hemming

Klöcker¹,

Yukna²

2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

View full text Add to dashboard Cite

Aluminum alloys are increasingly used in automotive structural applications thanks to their combination of low density, high strength, and good formability. Appropriate strength levels for dent resistant automotive aluminum panels may be achieved by a combination of alloy design and thermo-mechanical treatments. Unfortunately, increased strength (hardness) generally limits homogeneous plastic deformation. Thus, when shaping complex components large deformation and eventually strain localization, necking and final failure is more likely to occur. In this chapter, we endeavor to explore the best compromises between increased hardening and satisfying formability. Sheet metal shaping generates large strains and eventually strain localization. The accurate measure of metal behavior is discussed first. The following section is dedicated to the kinetics of damage development during shaping. Then metal ductility at low stress triaxiality and consequent strain localization are discussed. Finally, trimming and hemming, the most complex shaping operations to perform efficiently are analyzed providing a powerful tool for alloy design.

show abstract

Section: Hemming Of Aluminum Automotive Sheetsmentioning

confidence: 99%

Section: Hemming Of Aluminum Automotive Sheetsmentioning

confidence: 99%

Aluminum Sheet Metal Damage Mechanisms Application to Trimming and Hemming

Klöcker¹,

Yukna²

2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

View full text Add to dashboard Cite

show abstract

“…A flow rule with a corner-like effect, which was originally proposed by Simo (1987) and later modified by Kuroda and Tvergaard (2001a), is used. The direction tensor N p in Eq.…”

Section: Plasticitymentioning

confidence: 99%

“…The introduction of non-coaxiality between D and D p is a necessity to reproduce the corner effect observed in crystal plasticity (Kuroda and Tvergaard 2001a). The values of c ≈ 2 and p crit ≈ 20 • are suitable for representing the corner effect in crystal plasticity (Kuroda and Tvergaard 2001b).…”

Section: Plasticitymentioning

confidence: 99%

See 1 more Smart Citation

A strain-gradient plasticity theory with a corner-like effect: a thermodynamics-based extension

Kuroda

2015

Int J Fract

Self Cite

View full text Add to dashboard Cite

A higher-order strain gradient plasticity theory with a corner-like effect, which was recently proposed by the author, is updated to a form suitable for its thermodynamics-based extensions. It is assumed that the free energy is augmented by a defect energy that has a non-quadratic dependence on the plastic strain gradients. Predictive feature of the extended theory is examined via finite element analyses of a constrained simple shear problem and a plane strain tension problem involving plastic flow localization.

show abstract