Temperature increase associated with plastic deformation under dynamic compression: application to aluminium alloy al 6082 Articles uri icon

authors

  • PEREZ CASTELLANOS, JOSE LUIS
  • RUSINEK, ALEXIS

publication date

  • January 2012

start page

  • 377

end page

  • 398

issue

  • 2

volume

  • 50

international standard serial number (ISSN)

  • 1429-2955

abstract

  • The temperature increase associated with plastic deformation of a ma-terial under loading may be measured using several techniques such asinfrared thermography (IRT). The present work investigates the temperature increase at different high strain rates and initialtest tempe-ratures, using an aluminium alloy Al 6082. A Split HopkinsonPressureBar (SHPB) was applied to induce high strain rates to the material andan infrared camera was used to measure the temperature increase. Nu-merical simulations of dynamic tests were performed to calculate the temperature increase and to gain a better understanding of the process by local measurements. Thus, a detailed finite-elements model was deve- loped to simulate the dynamic compression test. The fraction of plastic work converted into heat was estimated using the Zehnder model. Numerical results in terms of the strain rate and initial temperature effecton the material temperature increase are reported and compared with experiments

keywords

  • infrared thermography; plastic strain; adiabatic heating; hopkinson bar