Experimental and numerical analysis on the martensitic transformation in AISI 304 steel sheets subjected to perforation by conical and hemispherical projectiles
Article dans une revue avec comité de lecture
Auteur
Date
2013Journal
International Journal of Solids and StructuresRésumé
In this work, an experimental and numerical analysis of the martensitic transformation in AISI 304 steel sheets subjected to perforation by conical and hemispherical projectiles is conducted. Experiments are performed using a pneumatic gas gun for with the impact velocities in the range of 35 m=s < V0 < 200 m=s. Two target thicknesses are examined, t1 ¼ 0:5 mm and t2 ¼ 1:0 mm. The experimental setup enabled the determination of the impact velocity, the residual velocity and the failure mode of the steel sheets. The effect of the projectile nose shape on the target’s capacity for energy absorption is evaluated. Moreover, martensite is detected in all the impacted samples, and the role played by the projectile nose shape on the transformation is highlighted. A three-dimensional model is developed in ABAQUS/Explicit to simulate the perforation tests. The material is defined via the constitutive model developed by Zaera et al. (2012) to describe the strain-induced martensitic transformation occurring in metastable austenitic steels at high strain rates. The finite element results are compared with the experimental evidence, and satisfactory matching is observed over the entire range of impact velocities tested and for both projectile configurations and target thicknesses considered. The numerical model succeeds in describing the perforation mechanisms associated with each projectile-target configuration analyzed. The roles played by impact velocity, target thickness and projectile nose shape on the martensitic transformation are properly captured.
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Conférence invitéeZAERA, Ramon; CASADO, Alvaro; RODRIGUEZ-MARTINEZ, José Antonio; RUSINEK, Alexis; FERNANDEZ-SAEZ, José; PESCI, Raphaël (2011)This work presents a constitutive model for metastable austenitic steels exhibiting Strain Induced Martensitic Transformation (SIMT). Based on the description of the kinetics of phase transformation proposed by Olson and ...
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Article dans une revue avec comité de lectureRODRIGUEZ MARTINEZ, José Antonio; RUSINEK, Alexis; ARIAS, Angel; ZAERA, Ramon; PEDROCHE, David Arias; PESCI, Raphaël (Elsevier, 2012)This paper presents and analyzes the behaviour of TRIP 1000 steel sheets subjected to low velocity perforation by conical projectiles. The relevance of this material resides in the potential transformation of retained ...
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Conférence invitéeZAERA, Ramon; CASADO, Alvaro; RODRIGUEZ-MARTINEZ, José A.; RUSINEK, Alexis; FERNANDEZ-SAEZ, José; PESCI, Raphaël (2011)The predictions of the constitutive model agree with experimental results in terms of macroscopy stress-strain curves and volume fraction of martensite formed during loading
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Article dans une revue avec comité de lectureZAERA, Ramon; RODRIGUEZ-MARTINEZ, J. A.; CASADO, Ana Maria; FERNANDEZ-SAEZ, José; RUSINEK, Alexis; PESCI, Raphaël (Elsevier, 2012)This study presents a constitutive model for steels exhibiting SIMT, based on previous seminal works, and the corresponding methodology to estimate their parameters. The model includes temperature effects in the phase ...
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Conférence invitéeIn this investigation, the thermo-viscoplastic behaviour of the steel AISI 304 has been examined. The experimental characterization of the material has been conducted in tension under wide ranges of strain rates.An analytical ...