16-01-2013, 01:19 PM
Experimental and Numerical Analysis of an In-Plane ShearSpecimen Designed for Ductile Fracture Studies
Experimental and Numerical Analysis.ppt (Size: 5.45 MB / Downloads: 37)
digital image correlation
DIC is a non-contact optical technique used to measure the
deformation field of an in-plane object. It obtains the
measurement data by matching the grey intensity distribution
of two sequential acquired images taken ‘before’ and
‘after’ deformation, which are considered as the reference
image and deformed image respectively. The light intensity
at the point (x1, x2) in the reference image can be expressed
by the grey matrix, G(x1, x2), over a selected subset. The
point (x1, x2) moves to a new location after deformation and
is referred as the point ( x1’, x2’ ) in the deformed image, the
Concluding Remarks
The stress and strain relationship for DP800 is determined by using uniaxial tensile tests and plastic hardening.
The shear tests are carried out and a non-contact optical field measuring technique, DIC, is adopted to measure the elongation of the gauge length and the shear strain distribution of the shear zone.
The deformation concentrates on the shear zone and no thinning phenomenon has been observed, which implies there exits no plastic instability in this kind of shear test.