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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 4. Отображено 4.
01-07-2015 дата публикации

Pressure-assisted VARI (vacuum assisted resin infusion) forming device and method

Номер: CN104742382A
Автор: YU MUHUO, ZHOU JINLI, PAN LIJIAN, ZHU SHU, SUN ZEYU, DING XIAOMA, LI BINGPENG, NI JIAQI, XU YINGKAI, JIA WENPIN, CHENG CHAO, TAO LEI, ZHANG ZHAO
Принадлежит:

The invention provides a pressure-assisted VARI (vacuum assisted resin infusion) forming device and method, which relate to an impressed pressure assisted VARI forming device. The pressure-assisted VARI forming device comprises an upper forming mold, a lower forming mold, an upper-lower mold fixing device, a pressurization device, a vacuum pump and a resin injection device. The device and method disclosed by the invention can solve the problem that the volume content of a composite fiber in an existing VARI forming product is relatively low due to insufficient vacuum pressurization, and defects such as holes, dry spots and the like exist in the product, so that the existing VARI forming product can not meet the structure requirements of high-performance composites. The device and method disclosed by the invention play the advantages of pressurized curing of an autoclave, and make up for inadequacies in the vacuum pressurization of VARI forming, so that an effect of enhancing advantage and ...

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Номер записи: 1
25-04-2023 дата публикации

PDCPD/carbon fiber composite material and application thereof

Номер: CN116003943A
Автор: ZHOU FEI, CHENG CHAO, SUN RONGHUA, WENG YUFEI, LIU BOLUN, XI JUN, JIANG FANGHONG, SHI MENGLIN, DING XIAOMA
Принадлежит:

The invention relates to a PDCPD/carbon fiber composite material and application thereof, and belongs to the technical field of carbon fiber reinforced epoxy resin composite materials. The polydicyclopentadiene/carbon fiber composite material is prepared from the following components in percentage by weight: 54.913 wt% to 80.622 wt% of dicyclopentadiene, 14.512 wt% to 27.457 wt% of a modifying agent, 4.837 wt% to 17.572 wt% of a curing agent and 0.028 wt% to 0.0577 wt% of a catalyst. And injecting the modified DCPD resin into the carbon fiber layer through negative pressure for infiltration, and carrying out staged heating curing to prepare the composite material. The method has the beneficial effects that the carbon fibers can be directly used without being subjected to surface treatment. The prepared PDCPD/carbon fiber composite material has no defects on the surface, and has excellent performance in the aspects of stretching, bending, interlaminar shear, compression resistance after ...

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Номер записи: 2
12-08-2015 дата публикации

Composite material porosity detection tag block and preparation method thereof

Номер: CN104833728A
Автор: YU MUHUO, ZHOU JINLI, ZHU SHU, SUN ZEYU, DING XIAOMA, LI BINGPENG, NI JIAQI, XU YINGKAI, JIA WENPIN, CHENG CHAO, TAO LEI, ZHANG ZHAO
Принадлежит:

The invention relates to a composite material porosity detection tag block and a preparation method thereof. The preparation method comprises carrying out double-end blocking on hollow fibers with different inner and outer diameters, different wall thickness and different ingredients, pre-burying the fibers in a composite material, guaranteeing hollowness degrees of the hollow fibers, simulating composite material aperture defects by cavities of the hollow fibers as composite material gaps so that known composite material gaps are obtained, and carrying out vacuum auxiliary molding by a corresponding laying method selected according to different bases and different reinforcing materials so that the composite material porosity detection tag block is obtained and satisfies practical detection diversification requirements. The composite material porosity detection tag block is scanned by an ultrasonic technique so that porosity distribution uniformity and porosity of the composite material ...

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Номер записи: 3
05-05-2023 дата публикации

Interface modification method of carbon fiber tows

Номер: CN116065396A
Автор: CHENG CHAO, ZHOU FEI, YANG QING, DIAO CHUNXIA, DING XIAOMA, LIU BOLUN, JIANG FANGHONG, XI JUN, CHEN ZHENGGUO, LEE YOUNG-CHUL
Принадлежит:

The invention discloses an interface modification method of a carbon fiber tow. The interface modification method mainly solves the problem that in the prior art, carbon fibers sized by a traditional epoxy sizing agent are poorer in matching property with a polydicyclopentadiene resin matrix. The method specifically comprises the steps of preparation of a sizing agent and sizing of the carbon fibers. According to the modification method, the carbon fibers do not need to be desized, the process cost is reduced, the prepared sizing agent can directly treat the surfaces of the carbon fibers, the bridging effect is achieved, and the carbon fiber binding capacity of polydicyclopentadiene and the sizing agent containing the epoxy groups is improved.

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Номер записи: 4