TY - JOUR
T1 - Strain rate measurement by Electronic Speckle Pattern Interferometry
T2 - A new look at the strain localization onset
AU - Guelorget, Bruno
AU - François, Manuel
AU - Vial-Edwards, Cristián
AU - Montay, Guillaume
AU - Daniel, Laurent
AU - Lu, Jian
PY - 2006/1/15
Y1 - 2006/1/15
N2 - In-plane Electronic Speckle Pattern Interferometry has been successfully used during tensile testing of semi-hard copper sheets in order to measure the strain rate. On one hand, heterogeneity in strain rate field has been found before the maximum of the tensile force (εt ≃ 19.4 and 25.4%, respectively). Thus, a localization phenomenon occurs before the classic Considère's criterion (dF = 0) for the diffuse neck initiation. On the other hand, strain rate measurement before fracture shows the moment where one of the two slip band systems becomes predominant, then strain concentrates in a small area, the shear band. Uncertainty evaluation has been carried out, which shows a very good accuracy of the total strain and the strain rate measurements. © 2005 Elsevier B.V. All rights reserved.
AB - In-plane Electronic Speckle Pattern Interferometry has been successfully used during tensile testing of semi-hard copper sheets in order to measure the strain rate. On one hand, heterogeneity in strain rate field has been found before the maximum of the tensile force (εt ≃ 19.4 and 25.4%, respectively). Thus, a localization phenomenon occurs before the classic Considère's criterion (dF = 0) for the diffuse neck initiation. On the other hand, strain rate measurement before fracture shows the moment where one of the two slip band systems becomes predominant, then strain concentrates in a small area, the shear band. Uncertainty evaluation has been carried out, which shows a very good accuracy of the total strain and the strain rate measurements. © 2005 Elsevier B.V. All rights reserved.
KW - ESPI
KW - Necking
KW - Strain localization
KW - Strain rate measurement
KW - Tensile test
KW - Uncertainty determination
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-29244476049&origin=recordpage
U2 - 10.1016/j.msea.2005.09.090
DO - 10.1016/j.msea.2005.09.090
M3 - RGC 21 - Publication in refereed journal
SN - 0921-5093
VL - 415
SP - 234
EP - 241
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
IS - 1-2
ER -