Inverse Characterization of Material Constitutive Parameters for Dynamic Applications

• Type: Article in International Conference Proceedings Book
• Date: 2015

Authors

Oliveira, I (Author) Other; Teixeira, P (Author) Other; Ferreira, F (Author) Other; Ana Reis (Author) FEUP

Conference proceedings International

Title: ICSI 2015 THE 1ST INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY FUNCHAL

Pages: 784-791

1st International Conference on Structural Integrity (ICSI)

Funchal, PORTUGAL, SEP 01-04, 2015

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 0 Citations

Other information

Authenticus ID: P-00G-TWC

DOI: 10.1016/j.proeng.2015.08.027

Abstract (EN): Accurate modelling of mechanical dynamic behavior is a prerequisite for an effective analysis of both manufacturing processes and dynamic load during service life of the components. Consequently, precise and reliable rate dependent constitutive models, and related parameters, are required to represent the plastic behavior of metals undergoing high-strain rate deformations. However, these parameters are not always directly measurable. This study presents an inverse methodology to identify the dynamic properties of metallic materials by using the Split Hopkinson pressure bar. First, a symmetric finite element model for the simulation of SHPB test was implemented into ABAQUS/Explicit software. An inverse analysis methodology was then established, enabling the determination of the material parameters for the Johnson-Cook constitutive law. A user defined objective function was used to measure the optimality of the parameters, by evaluating the error between numerical and experimental results of SHPB test, namely the elastic strain wave's evolution with time. The minimization of the objective function with respect to the material parameters was accomplished using the Levenberg-Marquardt optimization algorithm. (C) 2015 Published by Elsevier Ltd.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8