Finite element contact algorithms in K-dyna3D suitable for the simulation of high speed impact and penetration problems

摘要

Slide surface subroutines in K-DYNA3D have been rewritten and augmented to extend the limitations of traditional finite elements to applications in the simulation of high speed impact and penetration problems with extensive material damage andstructural failure. The new algorithms reconfigure slide surfaces at every time step to take into account solid and shell element removal after failure. Mass, in the form of free nodes and element groups, continues to interact correctly with appropriatemaster surfaces. Hydrodynamic material models enable the analysis of hypervelocity penetration of solid materials. Additional tools that automatically define, activate and deactivate slide surfaces in the course of a calculation minimize the cpu-intensive nature of the algorithms, allowing large assessments of complex impacting structures. Representative simulations of aircraft crash and hypervelocity impact are demonstrated.