Jméno :Ing. Lucie Šestáková Ph.D.
Název :IMPORTANCE OF STRESS AND DISPLACEMENT FIELDS EXPRESSED BY WILLIAMS EXPANSION FOR FRACTURE ANALYSES IN VARIOUS CRACKED GEOMETRIES
Autoři :ŠESTÁKOVÁ L., VESELÝ V.
Abstrakt :The paper deals with an analysis of the stress and displacement fields in different cracked specimens (loaded in mode I as well as in mode II). The main goal is to determine an accurate approximation of the near-crack-tip fields which can be subsequently used e.g. for estimation of the extent of the fracture process zone in quasi-brittle materials. Values of coefficients of the so-called higher-order terms of the power expansion are determined via regression from results of numerical simulations. The analysis is conducted on 2D numerical models and ANSYS FE computational system is employed. Various aspects of the description of the stress/displacement fields by means of the Williams higher-order terms is discussed.