Numerical modeling of the mechanical behavior and static strength estimation for a composite flange with a defect in the form of delamination

• Main Authors: Pisarev, P. V., Anoshkin, A. N., Osokin, V. M., Turyshev, S. V.
• Format: Conference Proceeding
• Language: English
• Subjects: Anisotropy; Computer simulation; Defects; Delamination; Elastic properties; Interlayers; Material properties; Mathematical models; Mechanical properties; Mechanical tests; Strain; Stress analysis
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.5013853

The paper reports the simulation results on the mechanical testing of flange segments in order to refine the properties of materials and predict the strength of a structure with a defect in the form of delamination. The spatial problem of calculating the stress-strain state of a flange sample during mechanical testing is considered. The flange design scheme takes into account the technological order of packing and the anisotropy of the reinforcing layer properties. A defect in the form of delamination was specified in the central part of the inflection of the layers; the material in this region had reduced elastic properties (close to zero). Based on the numerical simulation results of the mechanical tests on flange samples, the stress and strain fields in the layers were obtained and the strength of the structure was evaluated by the criterion of maximum stresses for stresses in the layers. The analysis of stress fields during testing of flange samples showed that the normal stretching interlayer stresses are the most dangerous as they determine the beginning of structure destruction.