%PDF-1.5
%
2 0 obj
<<
/Type /Catalog
/Pages 4 0 R
/Metadata 5 0 R
/PageLabels 6 0 R
>>
endobj
5 0 obj
<<
/Type /Metadata
/Length 4934
/Subtype /XML
>>
stream
application/pdf
Ming Zhao 1
2 and Mo Li 1
*
Comparative Study of Elastoplastic Constitutive Models for Deformation of Metallic Glasses
We present and compare three elastoplastic models currently used for deformation of metallic glasses, namely, a von Mises model, a modified von Mises model with hydrostatic stress effect included, and a Drucker-Prager model. The constitutive models are formulated in conjunction with the free volume theory for plastic deformation and are implemented numerically with finite element method. We show through a series of case studies that by considering explicitly the volume dilatation during plastic deformation, the Drucker-Prager model can produce the two salient features widely observed in experiments, namely, the strength differential effect and deviation of the shear band inclination angle under tension and compression, whereas the von Mises and modified von Mises models are unable to. We also explore shear band formation using the three constitutive models. Based on the study, we discuss the free volume theory and its possible limitations in the constitutive models for metallic glasses.
constitutive relations
metallic glass
finite element modeling
shear band
2012-12-04T17:22:26+08:00
PScript5.dll Version 5.2.2
2012-12-04T17:23:14+08:00
Acrobat Distiller 9.0.0 (Windows)
constitutive relations; metallic glass; finite element modeling; shear band
uuid:b2144df7-6835-4360-8275-dedff1c38d29
uuid:457edd1f-8743-4134-8760-7b5b74e7a43d
endstream
endobj
30 0 obj
<<
/Filter [/FlateDecode]
/Length 2490
>>
stream
hތXQs8~ϯУ+e3M]uU7uY.f}- lH*U6u ٶlB&B,T&T0
"_l{! dכouW2P0=,.8[m]2Rdxr|λ'ό{ο"'/JuVյDe~r3
p;.Ld1r+D[KUX%[%4R#a&"oOX3'JK&@f/G~J+̴gh19M/_V0Z"jKl:5(Bu36DJ*X+(U,BckU"$*V@$((*.dB~|P0xmdg[줣X$tv,iDekˇٰX}~hYm=miSYxRϽ=
#5,}8D d*X5[Ew@XukDd.JπȝȬ*&?̄7鍳)ʆ\;?ڛ.x+(?16/}\bEgvc
XtO*[7(vm[[tLSf[579R"WK'v*gx!S8~^:]ZLkںݾ^ۡΛ!dnYDQ:DILtSW淇q9khU¿@sReʫϝy:̷C".ȜT"H2uoa!#9G3$/y.KP
}' i`yֵ0j~'9@]_
ֵKYv~N H..-v'(a3ehgEu?Miyc]vO?Y~C,xoe~vjMmN<0)yEpQC K5cZfjIE]IHF. 5-L/?qêuBTS~ݱ"uv-
sLyMQo\A4~=>UGȏn/v`Nf=:8rXP9SB";sdoQCu"*2}./9cERXSe24I L3lu0c{";̼< 5]{ Eyskh*8Gg/OB*@ +sm뤂O߷_2*FyJ&کL1(|h4 Cό
LVʳdOTɏJR
;{-rr43OO >URQt]`&;K&DeH6cJTaZ6=lo4Zc#Q{s8MkV&3lz#_LS#:dBQm(*Dzu