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《高科技纤维与应用》2010,(6)
<正>一种实现碳纤维复合材料与金属材料叠层装配高质量制孔方法与装置,属于机械加工制造技术领域。其工艺方法的特征是:采用PCD或涂层或硬质合金钻头或金刚石磨棒制孔工具,对碳 相似文献
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复合材料热膨胀成型工艺研究与应用 总被引:7,自引:0,他引:7
简要叙述热膨胀工艺的原理和成型工艺过程,对热膨胀芯模的材料性能和设计、制造进行试验,分析影响膨胀压力的因素,并与热压罐成型工艺进行性能对比。以硅橡胶材料制作的芯模与钢模组合使用制备碳纤维复合材料制件,应用效果较好。研究表明,该工艺适用于多腔体复合材料制件的整体共固化成型。 相似文献
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碳纤维复合材料钻孔分层主要由钻孔入口的剥离作用和出口的推出作用所引起。轴向钻削推力是分层的主要原因,控制轴向推力可以提高制孔质量。设计无预制孔的麻花钻、带预制孔的麻花钻和阶梯钻三种钻孔工艺方案,根据现有三种工艺的轴向力模型,分析对比三种工艺方案的临界轴向力与直径比率、轴向力与钻削位置深度及轴向力与进给率关系,并使用SEM观察孔的质量。结果表明,使用阶梯钻和预制孔钻削能大幅减少轴向推力,获得高质量的孔出口。 相似文献
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On the analysis of force during secondary processing of natural fiber‐reinforced composite laminates
《Polymer Composites》2017,38(1):164-174
The rising concern regarding global warming has ignited a quest in the research fraternity towards development of sustainable materials that can reduce the carbon footprint. Natural fiber reinforced composites have made an excellent impression in the area of sustainable development because of their environmental and ecological aspects. These materials are widely used for manufacturing of engineering products. But, the use of natural fiber composites for engineering applications necessitates making of holes in order to ascertain assembly of several components by means of mechanical fastening. In this research endeavor, the drilling behavior of nettle/polypropylene (PP) composites has been experimentally investigated. The relative significance of the input process variables has also been studied with the help of statistical technique called analysis of variance (ANOVA). The present study established few significant facts in context of drilling of natural fiber reinforced composites. It has been observed that the facts established for drilling of synthetic fiber reinforced thermoset composites cannot be directly applied for natural fiber reinforced composites. POLYM. COMPOS., 38:164–174, 2017. © 2015 Society of Plastics Engineers 相似文献
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《Ceramics International》2020,46(4):4371-4380
Cf/SiC composite (carbon fiber reinforced silicon carbide ceramic matrix composites) is a kind of advanced composite material constituted by SiC as matrix and carbon fiber as reinforcing phase. Cf/SiC composites are being extensively used in the modern aerospace industry owing to their excellent physical and mechanical properties. The current work aims to investigate influences of clearance angle and point angle on drilling performance of 2D Cf/SiC composites using PCD (polycrystalline diamond) tools in terms of thrust force, drilling torque, hole surface quality, and material removal mechanism. PCD drill bits with different point angles and clearance angles were used in the experiment. The obtained results indicate that the 150° point angle is beneficial to improve the hole surface quality, and larger clearance angle is helpful to reduce the damage of exits. Additionally, the variation of clearance angle has little effect on the roughness of the machined surface. During the drilling process, the dominated material removal mechanisms are matrix removal, fiber breakage, and matrix-fiber debonding. The brittle fracture mode of carbon fibers, which directly affects surface roughness, can be divided into micro-brittle fractures in carbon fiber and macro-brittle fractures. Besides, the damage identification method of hole entrance and exit based on image processing technology is helping to improve the efficiency of machining quality evaluation. 相似文献
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轻质碳纤维复合材料帆船桅杆的设计与制备 总被引:1,自引:0,他引:1
碳纤维复合材料与金属相比,具有重量轻、可设计性强等优点.本文目的是设计并制备轻质碳纤维复合材料桅杆.基于等刚度准则,对具有等壁厚、异型截面的中空碳纤维复合材料桅杆进行设计,并运用数值模拟技术对结构铺层进行优化.采用纤维铺放和缠绕工艺制备出长度为16m的大尺寸碳纤维复合材料帆船桅杆,与铝合金桅杆相比减重43.4%.在设计工况下,桅杆变形试验值与数值模拟结果相近. 相似文献
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纤维增强复合材料具有力学性能各向异性、导热能力差等特点,在钻削加工时,容易产生分层、撕裂等加工缺陷。综述了钻削轴向力、切削参数、刀具几何结构等对纤维增强复合材料钻削缺陷的影响,进一步分析了钻削加工技术的研究现状,提出合理的加工参数、刀具结构及新的钻削加工技术,对于提高钻削加工质量具有重要的意义。 相似文献
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研究了碳纤维进行氧化处理、铺层形式,以及紫外光照射和不同溶液介质浸泡处理等,对碳纤维/乙烯基酯树脂复合材料拉伸性能的影响。结果表明:碳纤维最佳氧化工艺为浓硝酸氧化1 h,空气氧化温度250℃,空气氧化30 min。碳纤维最佳铺层设计为[0°,0°,45°]2s。随紫外光照射时间增加,复合材料拉伸强度呈先增后降趋势,120 h时达最大值。溶液介质浸泡会降低复合材料的拉伸强度。温度相同溶液介质不同时,复合材料在NaOH溶液中拉伸强度降低程度最大,温度提高会加速复合材料失效老化。 相似文献
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轻量化高性能碳纤维复合材料车体研发关键技术 总被引:4,自引:0,他引:4
简述了轨道交通领域碳纤维复合材料应用现状,从结构材料设计、整体结构设计、车体成型技术、构件连接技术、结构声学设计、缺陷检测技术等多个方面探讨复合材料整车车体研发的技术难点。在碳纤维复合材料车体研发的过程中,只有充分理解和实现复合材料的材料、设计、制造一体化,全面综合地考虑各种关键技术,才能获得高性能的碳纤维复合材料车体,并有效降低复合材料车体的成本;只有建立完整的复合材料车体设计、制造、验证技术规范和质量评价体系,碳纤维复合材料才能在轨道交通行业中得到推广应用。 相似文献
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碳纤维复合材料加固混凝土结构具有不破坏原结构,施工方法简便,加固后能使结构满足设计要求等优点.本文通过其性能特点、力学性能、加固设计方案依据等的论述,指出了碳纤维复合材料在施工方面的优越性. 相似文献
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