A Numerical Simulation of the Crack Growth in a Smooth CT Specimen

摘要

The numerical simulation of the crack growth in Compact Tension specimens which are plain sided is presented. The curves of the local crack extension (triangle opena) along the crack front vs. the load line displacement (v_(LL)) from a J_(IC)-multi-specimen test are used to control fracture initiation and crack growth. The agreement between the experimental and the computed load vs. displacement and J-integral vs. triangle opena curves is checked. Additionally, it is studied how some local parameters determined along the crack front, like the crack tip opening displacement (CTOD) or the triaxiality parameter #sigma#_m/#sigma#_(eq) (#sigma#_m = mean stress, #sigma#_(eq)=equivalent stress) change during the crack extension.