Forgeabilité des aciers inoxydables austéno-ferritiques

tel-00672279, version 1 - 21 Feb 2012
134 Chapter IV. STRAIN PARTITIONING
More recently Boldetti et al. [125] have reported new results on aluminum using a similar method.
Figure IV.35.a shows a comparison between finite element simulations and experimental contour plots
of the three components of the logarithmic plastic strain. The comparison in Figure IV.35.a has been
obtained by considering a model with no misalignment of the tools during the test. In fact, as mis-
alignment is common in a compression test, the same analysis was done in the case where an offset
of about 1mm was measured between the tools and the results shown in Figure IV.35.b demonstrate a
very good match between numerical and experimental plots.
a)
b)
Figure IV.35. Numerical (left) and experimental (right) contour plots of the components of the logarithmic
plastic strain; a) numerical values were obtained assuming perfect alignment between tools;
b) results obtained considering a misalignment of 1mm between tools [125].