In-plane shear strength of a carbon/carbon composite at different loading rates and temperatures

Yan, Kang; Zhang, Chengyu; Qiao, Shuqing; Han, Daoyang; Li, M.

doi:10.1016/j.msea.2010.10.047

Cited by 13 publications

(3 citation statements)

References 18 publications

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“…Скорость движения подвижной опоры в процессе испытания -2 мм/мин. [21]. Таким образом, моделирование структуры композиционного материала путем выбора шага прошивки дало возможность изготовить композиционный материал с необходимыми свойствами.…”

Section: таблица 2 теплофизические свойства материала «тафтинг»unclassified

3D Reinforcement Arrangements for Carbon-Carbon Composite Multilayer Fiber Preforms

Михеев¹,

Бухаров²,

Лебедев³

et al. 2022

Успехи Кибернетики / Russian Journal of Cybernetics

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для повышения эффективности работы энергетических установок нового поколения требуется совершенствование современных многослойных композиционных материалов с регулируемой схемой, плотностью армирования и межслоевой прочностью, гарантирующих устойчивость конструкций к действию высоких уровней термических и эрозионных нагрузок. Для эффективной разработки таких материалов требуется проводить моделирование их структуры с целью прогнозирования характеристик целевого изделия. В данной статье исследовано влияние параметров структуры материала и технологического процесса односторонней прошивки (тафтинга) многослойного пакета заготовки из углеродной ткани УТ-900 жгутом УКН-М-3К-ЭД на свойства композиционных материалов. В статье проводится моделирование технологии изготовления волокнистых преформ прошивкой тканого пакета углеродных тканей толщиной до 100 мм. Такой пакет является заготовкой для изготовления углерод-углеродного композита с требуемым уровнем теплофизических и конструкционных свойств.Опытным путем проведено моделирование структуры прошивки волокнистой заготовки для получения преформ армированного композиционного материала. Свойства материала «Тафтинг», необходимые для моделирования работоспособности конструкций, определены экспериментально и с учетом анизотропии свойств. Полученные результаты сравниваются с материалами КИМФ, Ипресскон, АРМИР-П и МКУ4М-7. to improve the efficiency of advanced powerplants, we need new multilayer composite materials with adjustable layup patterns, reinforcement density, and interlayer strength. They will ensure structural stability under high thermal loads and erosion. The structure of such materials should be modeled to forecast the properties of the final product. This paper studies the effects of composite structure and tufting (inserting a thread through a layered dry fabric with a needle that, after insertion, moves back along the same trajectory) of a multilayer UT-900 carbon fabric composite with the UKN-M-3K-ED thread on the properties of the composite. We simulated the tufting of layered carbon fabrics preforms up to 100 mm thick. These preforms are workpieces for making carbon-carbon composites with the required thermal, physical, and structural properties.We experimentally modeled the tufting of a layered reinforced composite preform structure. The anisotropic tufting process variables required to assess the structural properties were estimated experimentally. The results were compared with the properties of KIMF, Ipresscon, ARMIR-P, and MKU4M-7 composites.

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Section: таблица 2 теплофизические свойства материала «тафтинг»unclassified

3D Reinforcement Arrangements for Carbon-Carbon Composite Multilayer Fiber Preforms

Михеев¹,

Бухаров²,

Лебедев³

et al. 2022

Успехи Кибернетики / Russian Journal of Cybernetics

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“…As the thermal expansion coefficient of the fibers was smaller than that of the matrix, residual tensile stress existed on the fiber/matrix interface at temperatures lower than the preparation temperature. 54,55 The tensile stress was gradually released with increasing temperature. At 70°C, the rupture of fibers and debonding of the fiber/matrix interface occurred.…”

Section: Effect Of Temperature On Static Mechanical Propertiesmentioning

confidence: 99%

Effect of high temperature on mechanical properties and porosity of carbon fiber/epoxy composites

Wen

Hou

et al. 2022

Journal of Reinforced Plastics and Composites

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In this study, the mechanical behavior and porosity of a T700/epoxy composite material under high temperature conditions were investigated. The 0°/90° compression, tensile, interlaminar, and in-plane shear experiments of composite samples were performed at temperatures from 23°C to 170°C. The true strain–stress curves of composite samples were obtained. The cross section and fracture regions of the tested samples were analyzed by Scanning Electron Microscopy and X-ray tomography to understand the microstructure property relationships. It was observed that the mechanical performance of carbon fiber/epoxy composites generally decreased with increasing temperature. By comparing the fracture morphology, it was found that the fracture mechanism of the composites changed from interfacial debonding to matrix failure with increasing temperature. Three-dimensional visualization of porosities after mechanical experiments under high temperature conditions was reconstituted from X-ray tomography scan images. The results showed that the porosity fraction of the tested samples under high temperature conditions was generally higher than that under lower temperature conditions. Moreover, for the 90° tensile test, the diameter of the pores was mainly located at 4–12 μm and was almost constant along different distances to the failure edge. Meanwhile, compared with the tensile test, larger size of pores in samples of 90° compression tests were observed.

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“…In recent years, various experimental methods such as tension [3][4][5][6], shear [7][8][9] and bending tests [10][11][12] have been developed to measure the fracture strength and fracture toughness of ceramic matrix composites. Tao et al found that the tensile strength of 2d-C/SiC composites decreased from 266 MPa at room temperature to 146 MPa at 1000°C [3].…”

Section: Introductionmentioning

confidence: 99%

High temperature digital image correlation evaluation of in-situ failure mechanism: An experimental framework with application to C/SiC composites

Mao

Chen

et al. 2016

Materials Science and Engineering: A

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a b s t r a c tA high temperature digital image correlation (DIC) technique was developed, which was applied to study the in-situ fracture behavior of a carbon fibre reinforced silicon carbide matrix (C/SiC) composite. The displacement distribution and cracking information of the C/SiC single edge notched beam specimen can be monitored real-time, thanks to the improved DIC technique with special speckle patterns that can reach up to 1600°C. The results showed that the brittle to ductile transition temperature of C/SiC composites is about 1300°C. The new failure mechanisms of C/SiC composites at different experimental temperatures were further verified with the aid of X-ray diffraction and scanning electron microscope (SEM) techniques. In addition, the relationships between the fracture toughness, first-crack strength of C/ SiC composites and environmental temperature were deduced. The proposed experimental method and testing results may shed some light on assessing the reliability and durability of C/SiC composites at high temperatures.

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In-plane shear strength of a carbon/carbon composite at different loading rates and temperatures

Cited by 13 publications

References 18 publications

3D Reinforcement Arrangements for Carbon-Carbon Composite Multilayer Fiber Preforms

3D Reinforcement Arrangements for Carbon-Carbon Composite Multilayer Fiber Preforms

Effect of high temperature on mechanical properties and porosity of carbon fiber/epoxy composites

High temperature digital image correlation evaluation of in-situ failure mechanism: An experimental framework with application to C/SiC composites

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