MODAL APPROACH FOR PROCESSING ONE-POINT AND 3-POINT BEND TEST DATA FOR DSIF-TIME DIAGRAM DETERMINATION - PART II - CALCULATIONS AND RESULTS

In Part I of this paper, using the modal superposition method, equatio ns for dynamic SIF calculations are derived for an arbitrary linear mo del of an impact bend specimen. In this paper (Part II), modal paramet ers and other data which are necessary for the DSIF determination have been calculated for three types of specimen model: the Euler-Bernoull i beam model, and two- (2D) and three-dimensional (3D) solid models. F or the latter two cases, calculations were performed using the finite element program ADINA. Results for the 2D model of the specimen were f itted by polynomials for a wide range of specimen geometry parameters and Poisson's ratio values. Considerable differences were observed bet ween the beam model parameters and the 2D or 3D ones. The differences in results for the 2D and 3D models are small and mainly connected wit h non-uniformity of the SIF distribution along the front of a through- crack in the 3D solid. Results of processing one- and three-point bend test data reported in the literature are presented. Numerical DSIF va lues are compared with the experimental ones.