Determination of constitutive parameters from a Taylor test using inverse analysis

Abstract

Identification of material constitutive parameters is critical for accurate representation of the mechanical behavior of materials at high strain rates. However, customary characterization procedures based on curve fitting of stress-strain curves, in some cases, are not accurate when the mechanical response exhibits strain rate dependency. In this paper, an inverse characterization technique based on the Taylor impact test is proposed. The technique uses a data reduction operator based on line moments and genetic algorithm optimization to determine the optimum constitutive parameters. Material parameters for a low carbon steel associated with the Plastic Kinematic model were determined using the proposed method.

Mechanical characterization of polycarbonate reinforced with nanoclay and graphene oxide

“…They calculated the coefficients of Johnson–Cook and Zerilli–Armstrong material models for aluminum and steel for static and dynamic loading. The coefficients of Cowper‐Symonds material model for low‐carbon steel were calculated using the Taylor test and inverse method by Hernandez and Maranon . Joe et al calculated the Johnson–Cook coefficients for titanium using the Hopkinson test by reverse method.…”

High Strain Rate Response of In-Situ TiB2/7055 Composite by Taylor Impact

“…At present, intensive studies have focused on the mechanical behavior [ 8 , 9 , 10 , 11 , 12 ], microstructure evolution [ 13 , 14 , 15 , 16 ] and failure behavior [ 17 , 18 , 19 ] of alloys and composites under high strain rate by means of medium and high strain rate tension, Hopkinson bar, Taylor impact and finite element simulation [ 20 , 21 , 22 , 23 , 24 ]. Acosta et al [ 20 ] developed a reliable method for obtaining the material constitutive parameters.…”