@Article{cmc.2015.046.195,
AUTHOR = {N.  Ma, K.  Sato, K.  Takada},
TITLE = {Analysis of Local Fracture Strain and Damage Limit of Advanced High Strength Steels using Measured Displacement Fields and FEM},
JOURNAL = {Computers, Materials \& Continua},
VOLUME = {46},
YEAR = {2015},
NUMBER = {3},
PAGES = {195--219},
URL = {http://www.techscience.com/cmc/v46n3/22800},
ISSN = {1546-2226},
ABSTRACT = {The local mechanical behaviors of advanced high strength steels undergoing a very large strain from uniform plastic deformation to fracture were investigated with the aid of a measured displacement field and a measurement based FEM. As a measurement method, a digital image grid method (DIGM) was developed and the three-direction transient displacement field on uniaxial tensile test pieces was measured. Combining the measured transient displacement field with the finite element method, a measurement based FEM (M-FEM) was developed for the computation of distribution of the local strains, local stresses and ductile damage accumulation in a tensile test piece. Furthermore, the local fracture strain and damage limit of several advanced high strength steel sheets (980MPa/t1.2mm, 980MPa/t1.6mm, 1180MPa/t1.6mm) were identified by uniaxial tensile tests and the measurement based FEM. The identified damage limit of materials agreed very well compared with that measured by a conventional press test, and the validity of the measuring method and measurement based FEM was verified.},
DOI = {10.3970/cmc.2015.046.195}
}