A study on second mode stress intensity factor (KII)‎ of cracked plates under compression load

Abstract EN

A two-dimensional finite element method for analysis and determination of second mode stress intensity factor (KII) of several crack configurations in plates under uniaxial compression is presented in this study.

Various cases including diagonal crack (i.e.

corner crack, central crack as well as at different locations on the diagonal) and central kinked crack are investigated with different crack's length, orientation and location.

The influence of the contact between two crack surfaces is taken into account by applying contact element procedure with desired friction coefficient.

The stress intensity factor is calculated by a crack surface displacement extrapolation technique.

From the obtained results of the analysis it is found that, the corner cracked plates more dangerous than the other cracked plates, since it has the highest stress intensity factor.

Also, the length and orientation of the kinked crack have significant effects on the stress intensity factor.

The results of this investigation is illustrated graphically, exposing some novel knowledge about the stress intensity factor and its dependence on crack configuration.