Deformation and failure of carbon fiber composite specimens with embedded defects during tension-torsion test

• Main Authors: Tatyana Viсtorovna Tretyakova, Valery E. Wildemann, Elena M. Strungar, Mikhail P. Tretyakov
• Format: Article
• Language: English
• Published: Gruppo Italiano Frattura 2018-09-01
• Series: Frattura ed Integrità Strutturale
• Subjects: Carbon fiber composite; Embedded defect; Complex stress state; Digital image correlation technique; Infrared thermography; Deformation
• Online Access: https://www.fracturae.com/index.php/fis/article/view/2151

A need to timely reveal operational damages and technological defects requires a prompt control of states of structures made from composite materials and their consequent repairs aimed at service life extension. This work is devoted to the experimental study of inelastic deformation and fracture of specimens made from layer composite materials with prior introduced technological defects related to a possible inappropriate compacting and inappropriate bonding of material layers at a given restricted domain. The analysis is carried on the evolution of inhomogeneous deformation fields on the surface of carbon plastic specimens with an internal “delamination-type” defect under complex stress state. The method of active infrared thermography was used to identify the location and parameters of defects configurations. The obtained experimental data will be used for further tests related to sufficiency evaluation of signals received from the built-in sensors under complex loadings.