The Influence of thickness on residual flexural strength of composite with low-velocity impact damages: Experimental study

The Influence of thickness on residual flexural strength of composite with low-velocity impact damages: Experimental study

Автор: Kudryavtsev O.A., Ignatova A.V., Olivenko N.A.

Журнал: Вестник Пермского национального исследовательского политехнического университета. Механика @vestnik-pnrpu-mechanics

Статья в выпуске: 3, 2021 года.

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Assessment of the residual strength of composite structural elements that can be subjected to low-velocity impact during operation is still a vital engineering problem. Its solution requires not only the understanding of the basic mechanisms of energy dissipation in composites but, the study of factors affecting the impact resistance of the material. The thickness is one of the main parameters that affects the mechanical behaviour of the composite at low-velocity impacts and, as a consequence, its residual strength. This paper presents the experimental study of the material thickness and impact energy influence on the residual flexural strength of woven glass fibre-reinforced plastic specimens. At the first stage of the study, low-velocity impact tests with different impact energies on GFRP plate specimens with the thickness of 2 mm, 4 mm, and 6 mm were carried out. At the second stage, the beam specimens were cut out from the plate specimens with impact damages, and three-point bending tests were carried out. The dependencies of the residual flexural strength were obtained at various impact energies for all specimen thicknesses. The sensitivity of the Flexure-After-Impact test protocol to the delamination and fibre damages in the composite specimens were assessed.

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Polymer-matrix composites, glass fibre-reinforced plastic, low-velocity impact, impact damages, flexure-after-impact, residual strength

Короткий адрес: https://sciup.org/146282369

IDR: 146282369   |   DOI: 10.15593/perm.mech/2021.3.01

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