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Many composite products are produced at low temperatures in processes such as resin transfer molding (RTM), vacuum infusion molding (e.g., Seemann Composite Resin Infusion Molding Process—SCRIMP), and hand lay‐up. These processes are widely used for marine, civil infrastructure, transportation and defense applications. Unsaturated polyester and vinylester resins are two major resins used in these processes due to their low cost, good performance, and processibility. In this study, the reaction kinetics and rheological changes of these two resins cured at low temperatures were studied. Effects of resin type, initiator, promoter, inhibitor and retarder on the reaction kinetics and rheological behaviors were examined using a Differential Scanning Calorimeter (DSC) and a Rheometrics Dynamic Analyzer (RDA). A model was developed to quantify the effects of resin type, temperature, and different curing agents on the gel time for both polyester and vinylester resins cured at low temperatures. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1230–1242, 2001 相似文献
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Resin Infusion Processes such as SCRIMP, VA-RTM, and variations thereof, are increasingly being considered for the fabrication of large structural components such as bridge decks and ship hulls wherein preform elements consist not only of varying fabric architectures but also include foam cores. Based on the method of infusion – high permeability distribution media or resin channels/microgrooves, flow through the preform can be tailored to be either 1-D, 2-D, 3-D or a combination thereof. This paper emphasizes the effect of exothermic temperature history on flow & cure phenomena, and mechanical properties of a series of structural elements ranging from a flat plate to a typical truss-core type structure. The effect of geometry and flow on exothermic characteristics is experimentally monitored, and results correlated to provide guidance in the further use of the process. Critical areas lacking in detailed understanding are identified and a set of preforming and process induced defects that cause changes in thermal history are described. 相似文献
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随着列车火灾事故的增多和轨道交通的大规模建设,列车的防火要求日益严格。酚醛树脂以其难燃、低发烟、耐热的优点被大量使用。SCRIMP成型技术的应用极大地提高酚醛玻璃钢的施工性能。本文介绍了TM-PF3010酚醛树脂在SCRIMP成型技术中的应用。 相似文献
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关于SCRIMP 总被引:2,自引:0,他引:2
张红梅 《玻璃钢/复合材料》1997,(4):46-47
本文较为系统地介绍了SCRIMP这种新型模压工艺的工作原理,材料性能,成型工艺及应用,重点突出了SCRIMP比手糊和RTM的优越之处。 相似文献
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M. P. Boyle J. C. Roberts P. D. Wienhold G. Bao G. J. White 《Composite Structures》2001,52(3-4):375-380
Rectangular orthotropic sandwich fiber reinforced plastic (FRP) panels were tested for buckling in uniaxial compression. The panels, with either balsa or linear PVC foam cores, were tested in two sizes: 183 cm×92 cm (72 in.×36 in.) and 122 cm×92 cm (48 in.×36 in.) for aspect ratios of 2.0 and 1.3, respectively. The sandwich panels were fabricated using the vacuum-assisted resin transfer molding (VARTM) technique. The two short edges of the sandwich panels were clamped, while the two long edges were simply supported. The experimental elastic buckling loads of panels with an aspect ratio of 1.3 were 400 kN (90 klb) for balsa core panels and 267 kN (60 klb) for foam core panels. For balsa and foam core panels with an aspect ratio 2.0, the experimental buckling loads were 334 kN (75 klb) and 240 kN (54 klb), respectively. Experimental buckling results for balsa core panels of both sizes differed by 5–8% from numerical and analytical results. Differences in experimental and predicted buckling loads for foam core panels ranged between 15% and 23%. Post-buckling collapse of balsa and foam core panels with an aspect ratio of 1.3 were 694 kN (156 klb) and 347 kN (78 klb), respectively. For balsa and foam core panels with an aspect ratio of 2.0, post-buckling collapse occurred at 592 kN (133 klb) and 334 kN (75 klb), respectively. A numerical post-buckling analysis qualitatively followed that of the experimental results. 相似文献
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SCRIMP成型工艺的研究 总被引:14,自引:0,他引:14
本文侧重介绍了SCRIMP工艺材料的合理选用和树脂分配系统的设计,并以一甲板制作实例简述了SCRIMP工艺成型过程。 相似文献
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SCRIMP成型工艺及其在船舶和基础工程领域的应用 总被引:10,自引:0,他引:10
本文介绍了CSRIMP成型工艺的基本原理,特点,阐述了该工艺在船舶领域应用的技术优势,船舶和基础工程上的应用实例,并预测了推广应用方向。 相似文献
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采用粘度、凝胶时间及力学性能测试以及示差扫描量热分析和扫描电镜研究了上纬环氧树脂2511-A体系的工艺性能,固化反应行为及其采用西曼树脂浸渍膜塑成型工艺(Seeman Composites Infusion Molding Process,SCRIMP)制成的环氧玻璃纤维复合材料的性能。结果表明:2511-A体系在25~35℃下粘度保持在600 mPa.s以下的时间长达120 min,满足SRCIMP成型工艺要求,其玻璃化转变温度为112℃。复合材料的孔隙率仅为0.19%,且具有良好的力学性能。 相似文献
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树脂基复合材料成型工艺研究进展 总被引:3,自引:0,他引:3
主要综述了树脂基复合材料的几种成型工艺,包括RTM、VARTM、CRTM、LRTM、RFI、VARI、SCRIMP、SRIM、TERM,各自的发展现状、成型原理、特点等. 相似文献