Research of the damage accumulation and destruction processes of perforated composite plates

• Published in: IOP conference series. Materials Science and Engineering 2021-02, Vol.1093 (1), p.12030
• Main Authors: Strungar, E M, Feklistova, E V, Wildemann, V E, Lobanov, D S
• Format: Article
• Language: English
• Subjects: Composite materials; Composite structures; Damage accumulation; Deformation; Destruction; Extensometers; Fiberglass; Perforated plates; Software engineering; Stress concentration
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/1093/1/012030

The main purpose of the research is to comprehensively study the regularities of deformation processes damage accumulation and destruction of modern composite materials in stress concentration zones. The object of research is fiberglass samples with four round holes. As a result of experimental studies loading diagrams were obtained for samples with different length of the working area. The paper presents graphs of the load dependence on the longitudinal deformation. According to the data obtained it can be noted that the longer the length of the working area of the sample the earlier the failure occurs. The deformation was obtained using the optional Vic-3D “virtual extensometer” non-contact optical video system. In the experiments process curves of longitudinal deformations were plotted. From these data it is possible to estimate the maximum longitudinal deformations occurring near the hole. Also in the work numerical modeling of the process of deformation and destruction of perforated plates was carried out in the software engineering complex Ansys. The calculated data obtained confirm the experimental results of the research.