Ductile failure modes in dynamically loaded notched bars Conference Paper uri icon

abstract

  • Dynamic ductile rupture is analyzed for notched bars under impulsive tensile loading. An elastic-viscoplastic material model is employed that accounts for ductile fracture by the nucleation and subsequent growth of voids to coalescence. Full transient analyses are carried out, so that both inertia and material strain-rate dependence is taken into account. Also adiabatic heating due to plastic dissipation and the associated thermal softening are incorporated in the analyses. Results are shown for plane strain notched specimens as well as axisymmetric notched specimens, and the predicted failure modes are related to results of quasi-static analyses.

published proceedings

  • American Society of Mechanical Engineers, Applied Mechanics Division, AMD

author list (cited authors)

  • Tvergaard, V., & Needleman, A

complete list of authors

  • Tvergaard, V||Needleman, A

publication date

  • December 1990