METHOD FOR DETERMINATION OF ACTUAL STRESSES IN MATERIAL IN PRE-DESTRUCTION ZONE NEAR THE TOP OF A CRACK

摘要

A method for determination of actual stresses in material in zone of pre-destruction near the top of a crack consists in measurement of plastoelastic deformations on the surface of material by the method of digital correlation of speckle-images and with a tensometric profilograph. The deformations are measured in three normal to each other directions, with determination of equivalent deformation, and by that one stress in material near the top of the crack is determined from the real diagram of destruction of material.