Materials science-based simulation strategies for the adiabatic cutting process

Schmitz, F.; Winter, S.; Clausmeyer, T.; Even, D.; Colasse, C.; Tekkaya, E.A.; Wagner, M.F.-X.

Materials science-based simulation strategies for the adiabatic cutting process (bibtex)

by F. Schmitz, S. Winter, T. Clausmeyer, D. Even, C. Colasse, E.A. Tekkaya, M.F.-X. Wagner

Abstract:

In automotive industry advanced high strength steels (AHSS) are widely used. However, the modeling of the mechanical behavior of such material is challenging. The demand to shear-cut AHSS parts without additional post-processing steps like deburring or heat-treatment manufacturing of high quality cutting surface cannot be met at present. High strain rate and local temperature leads to adiabatic shear bands (ASB). This process offers to blank AHSS with excellent quality, but a fundamental understanding of the process and the availability of efficient simulation strategies are missing, which are important for establishing the technology. Compression tests in a Split-Hopkinson Pressure Bar (SHPB) with an initial strain rate of 10³ s^-1 and a temperature range between 200 and 1000 °C are performed. The microstructure of the specimens is examined with optical microscopy. The thermo-mechanical behavior is considered in simulations by a Johnson Cook material model. A fracture criterion is utilized to predict crack initialization and material separation. Material parameters are identified on the basis of the conducted experiments. With this at hand, simulations of adiabatic blanking are conducted and the influence of the critical damage value is investigated. The simulation results are compared with the experimentally determined sheared surface. This serves the purpose to identify relevant mechanisms of the material separation process.

Reference:

Schmitz, F., Winter, S., Clausmeyer, T., Even, D., Colasse, C., Tekkaya, E.A., Wagner, M.F.-X.: Materials science-based simulation strategies for the adiabatic cutting process, Proc. of the 5th International Conference on Steels in Cars and Trucks, 2017.

Bibtex Entry:

@InProceedings{schmitz2017,
  author    = {Schmitz, F. and Winter, S. and Clausmeyer, T. and Even, D. and Colasse, C. and Tekkaya, E.A. and Wagner, M.F.-X.},
  title     = {Materials science-based simulation strategies for the adiabatic cutting process},
  booktitle = {Proc. of the 5th International Conference on Steels in Cars and Trucks},
  year      = {2017},
  address   = {Amsterdam},
  month     = mar,
  abstract  = {In automotive industry advanced high strength steels (AHSS) are widely used. However, the modeling of the mechanical behavior of such material is challenging. The demand to shear-cut AHSS parts without additional post-processing steps like deburring or heat-treatment manufacturing of high quality cutting surface cannot be met at present. High strain rate and local temperature leads to adiabatic shear bands (ASB). This process offers to blank AHSS with excellent quality, but a fundamental understanding of the process and the availability of efficient simulation strategies are missing, which are important for establishing the technology. Compression tests in a Split-Hopkinson Pressure Bar (SHPB) with an initial strain rate of 10\textsuperscript{3} s\textsuperscript{-1} and a temperature range between 200 and 1000 °C are performed. The microstructure of the specimens is examined with optical microscopy. The thermo-mechanical behavior is considered in simulations by a Johnson Cook material model. A fracture criterion is utilized to predict crack initialization and material separation. Material parameters are identified on the basis of the conducted experiments. With this at hand, simulations of adiabatic blanking are conducted and the influence of the critical damage value is investigated. The simulation results are compared with the experimentally determined sheared surface. This serves the purpose to identify relevant mechanisms of the material separation process.},
}