Studying the Development of a Technological Defect in Complex Stressed Construction CFRP Using Digital Image Correlation and Acoustic Emission Methods

Abstract

The work is devoted to experimentally studying regularities of inelastic strain and fracture in CFRP samples with pre-embedded technological defects corresponding to possible nonpressings and starved joints between material layers within a given bounded domain. The evolution of inhomogeneous strain fields at the surface of CFRP samples with an internal starved-joint type defect in a complex stressed state is analyzed. Faulty structures were located in the composite material using the acoustic emission method. This method allowed analysis of damage accumulation processes in complex loaded samples. The experimental data will be used in further tests to assess the adequacy of signals received from embedded fiber optic sensors subjected to complex-form loads.