Reference : Numerical modeling of damage evolution of DP steels on the basis of X-ray tomography ...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/78535
Numerical modeling of damage evolution of DP steels on the basis of X-ray tomography measurements
English
Ben Bettaieb, Mohamed mailto [Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F >]
Lemoine, Xavier [> >]
Bouaziz, O. [> >]
Habraken, Anne mailto [Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo >]
Duchene, Laurent mailto [Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F >]
Mar-2011
Mechanics of Materials
Elsevier Science
43
3
139-156
Yes (verified by ORBi)
International
0167-6636
[en] DP steel ; damage ; void nucleation ; void growth ; GTN model ; tomography ; LIMARC
[en] In order to couple the damage evolution and the stress state of DP steel grades, a new advanced GTN (Gurson-Tvergaard-Needleman) model was developed and implemented into a finite element code. This model is an extension of the original one. It takes into account the plastic anisotropy and the mixed (isotropic+ kinematic) hardening of the matrix. Two different methods to compute the void volume fraction were developed and used within the constitutive equations. The first method is new and allows the accurate modeling of the observations of damage initiation and growth in DP steels measured using high-resolution X-ray absorption tomography (Bouaziz et al., 2008; Maire et al., 2008). The second method is classic and assumes the additive decomposition of the total void volume fraction into a nucleation and a growth part. A parametric study is carried out to assess the effect of the kinematic hardening on some mechanical parameters such as the equivalent plastic strain, the triaxiality and the porosity. The numerical predictions are favorably compared to the experimental results.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/78535
10.1016/j.mechmat.2011.02.005

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