Fracture Evaluation Of Metallic Materials At
Intermediate Strain Rates
Author(s)
S. J. Lim, K. H. Ahn, H. Huh, S. B. Kim & H. W. Kim
Abstract
This paper evaluates existing dynamic hardening models and fracture strains for
metallic materials of typical crystalline structures: 4130 steel (BCC); OFHC
copper (FCC); and Ti6Al4V (HCP). Uniaxial tensile and fracture tests of the
representative materials are carried out at intermediate strain rate. In order to
describe the dynamic hardening characteristics, several models are compared for
each material and the most applicable model for a specific material has been
recommended. The fracture tests at strain rates ranging from 0.001s-1 to 100s-1
are conducted with several types of the pure shear, dog bone and grooved
specimens for the strain paths of the pure shear, uniaxial tension and plain strain
conditions. The fracture strain and the strain path are measured on the surface of
the specimen and the Lou-Huh ductile fracture criterion is implemented to
describe the fracture loci with respect to the strain rate.
Keywords: ductile fracture criterion, strain rate, 4130 steel, OFHC copper,
Titanium alloy.
Keywords
ductile fracture criterion, strain rate, 4130 steel, OFHC copper,
Titanium alloy
Related Book
Other papers in this volume
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