Influence of the reinforcement scheme on mechanical properties of 2d, 3d polymer composites

Hilov, P. A.; Babushkin, A. V.; Wildemann, V. E.; Лобанов, Д. С.; Staroverov, Oleg; Strungar, Elena; Krupennikov, V. A.

doi:10.1088/1757-899x/953/1/012095

Cited by 2 publications

(3 citation statements)

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“…The accuracy of obtained experimental data is also influenced by the surface of the specimen and the configuration and calibration of cameras [24]. Upon test results given in [6], a conclusion was drawn that by using the Vic-3D digital optical system, it is possible to determine the strain on a fixed base with an accuracy comparable to the data on a suspended longitudinal strain sensor whose maximum possible deviation from the measured value is 0.15%.…”

Section: Study Methodsmentioning

confidence: 98%

“…Researchers have achieved great success in studying the mechanical properties of composite laminates with an open hole and have recently started to study 3D textile composites [5][6][7]. The work [2] studies the failure mechanisms of 3D orthogonal woven composites made of E-glass and epoxy resin with drilled and molded holes using X-ray technology.…”

Section: Introductionmentioning

confidence: 99%

“…This work is a continuation of a comprehensive study of 3D woven carbon fiberreinforced plastics under different types of loading. Previously, the authors in works investigated a total of eight structures (orthogonal, orthogonal conjoined, with layer-to-layer reinforcement, with layer-to-layer reinforcement and a longitudinal layer, with layer-tolayer conjoint reinforcement, and with through layer-to-layer reinforcement) [6][7][8]. In the considered work, five configurations were selected, one type from each pair.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Sensitivity of Various Reinforcement Patterns for Structural Carbon Fibers to Open Holes during Tensile Tests

2021

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This paper is devoted to the experimental study of polymeric composite specimens, with various types of reinforcement, in order to evaluate the breaking strength of specimens with open holes when undergoing uniaxial compression and tensile tests. Four types of interlaced 3D woven preforms were considered (orthogonal, orthogonal combined, with pairwise inter-layer reinforcement, and with pairwise inter-layer reinforcement and a longitudinal layer), with a layered preform used for comparison. Tensile tests of solid specimens without a hole, under ASTM D 3039, and of specimens with an open hole, under ASTM D 5766, were carried out using the Instron 5989 universal electromechanical testing system. Movements and strains on the specimen surface were recorded using a Vic-3D contactless optical video system and the digital images correlation method (DIC). For all the series of carbon fiber tension specimens, strain and stress diagrams, mechanical characteristics, and statistical processing for 10 specimens were obtained. The paper evaluated deformation fields for certain points in time; the obtained fields showed an irregular distribution of deformation and dependency on types of reinforcing fibers. A coefficient of strength variation is introduced, which is defined as a ratio of the ultimate stress limits obtained on solid samples with and without open holes. Within the framework of ASTM D 5766, when calculating the ultimate stress, the hole is not taken into account, and the paper shows that for certain structures a hole cannot be excluded. The hole size must not be neglected when calculating the ultimate stress.

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Section: Study Methodsmentioning

confidence: 98%