Analysis of the causes of defects in structural elements with a combination of hole drilling methods and photoelasticimetry

摘要

The content of the paper is to acquaint with the problematics of structural failure, description of quantification of residual stresses by the drilling method and design of the methodology of using optical methods for their verification. The solution was based on lot of experience of the workplace (KAMaSI SjF TUKE) in the field of determination of residual stresses by the drilling method and the Ring-Core method, as well as the use of optical methods (photoelasticimetry and DIC) for full-field analysis of investigated objects. Although the optical methods have been used for stress and strain analysis for decades, with the continuous development of new and more accurate measuring instruments and devices, the possibilities of creating new application methodologies are opening up. To advisement the possibility of using the Optical PhotoStress method for quantifying residual stresses, has been designed an accurate positioning device to analyze the released deformations around the drilled hole in multiple steps as defined by ASTM E837-13a for drilling methods.