Modelling of Thermo-viscoplastic Behavior of DH36 and Weldox 460 E Structural Steels at Wide Ranges of Strain rates and Temperatures, Comparison of Constitutive Relations for Impact Problems Articles uri icon

publication date

  • May 2009

start page

  • 599

end page

  • 621

issue

  • 5

volume

  • 41

international standard serial number (ISSN)

  • 0167-6636

electronic international standard serial number (EISSN)

  • 1872-7743

abstract

  • In this paper, the thermo-viscoplastic behaviour of DH-36 and Weldox-460-E steels is analyzed at wide ranges of strain rates and temperatures. These materials are commonly used for naval applications. Thus, they may be subjected to a wide range of exploitation temperatures and at the same time to high strain rates due to accidental impact or explosion. The thermo-viscoplastic behaviour of these materials has been modeled by application of RK (Rusinek&-Klepaczko) constitutive relation. The predictions obtained using RK constitutive relation have been compared with JC (Johnson&-Cook) and PB (Physical Base) constitutive relations with use of the experimental results reported in the works of Nemat-Nasser and Guo [Nemat-Nasser, S., Guo, W.G., 2003. Thermomechanical response of DH-36 structural steel over a wide range of strain rates and temperatures. Mech. Mat. 35, 1023&-1047] and Borvik et al. [Børvik, T., Hopperstad, O.S., Berstad, T., Langseth, M., 2001. A computational model of viscoplasticity and ductile damage for impact and penetration. Eur. J. Solid. Mech. A. 20, 685&-712]...