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通过对一种镀复碳纤维进行的强力伸长试验,叙述了碳纤维强力伸长的测试方法和测试要求,以期帮助相关人员掌握碳纤维拉伸性能的检测方法。 相似文献
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拉伸性能是金属材料的重要机械性能之一,通过拉伸性能试验可以有效的测出金属屈服强度、抗拉强度、伸长率、断面收缩率等性能指标,对把握金属材料性能有着重要意义。本文根据《金属材料室温拉伸试验方法》,就金属材料拉伸性能试验方法进行了简要的研究。 相似文献
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针对碳纤维在二维编织过程中不耐扭折、易受损断纱的问题,通过拉伸性能实验和导纱瓷眼折角磨损实验分析了碳纤维复丝的可编织性能,探讨了纱管在缠绕过程中应注意的问题。在24 锭二维编织机上编织了8 种不同工艺参数的碳纤维管状编织物,研究了编织工艺对织物外观起毛情况及力学性能的影响。结果表明:碳纤维复丝的断裂强度为86.39 cN/tex,断裂伸长率为1.12%,断裂强度远高于其他纤维,但延伸性差;影响碳纤维复丝在导纱瓷眼处折角磨损程度的因素依次为牵引力、折角、编织速度;在编织纱线根数不变的情况下,随编织节距的减小,管状编织物的面密度逐渐增加,起毛现象严重,编织物的拉伸断裂强力降低。 相似文献
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为探讨凉爽锦纶纤维的热湿性能,测试分析了纤维的细度不匀、拉伸性能、摩擦抱合性能、沸水收缩率和含油率等基本性能;在此基础上,通过差热分析、热重分析、降温实验、吸湿实验和放湿实验分别研究了凉爽锦纶纤维的热性能、降温性能和吸放湿性能。结果表明,凉爽锦纶纤维的细度不匀、拉伸性能和摩擦抱合性能比普通锦纶略差,沸水收缩率和含油率与普通锦纶相似;凉爽锦纶纤维的差示扫描量热曲线与普通锦纶存在一定差异,在织造、染整等加工过程中的控制温度应低于370℃;凉爽锦纶纤维的降温性能、吸放湿性能均优于普通锦纶。 相似文献
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从原料的选择、输网速度和水刺压力等方面分析研究面密度为35g/m2的竹浆粘胶纤维水刺非织造布的加工工艺与产品性能之间的关系,以制备性能优异的竹浆粘胶纤维水刺非织造布。通过对纤维原料的分析,选用1.67dtex×38mm的竹浆粘胶纤维作为加工原料。对拉伸断裂强度、撕裂强力及外观质量的分析研究,结果表明:当输网帘速度为90m/min、水刺头1~5水压分别为2、8、14、10、12 MPa时,制备的竹浆粘胶纤维水刺非织造布综合性能最好。 相似文献
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In the recent years, the use of textile structures made from high performance fibers is finding increasing importance in composites applications. In textile process, there is direct control over fiber placements and ease of handling of fibers. Besides economical advantages, textile technologies also provide homogenous distribution of matrix and reinforcing fiber. Thus textile performs are considered to be the structural backbone of composite structures. Textile technology is of particular importance in the context of improving certain properties of composites like inter-laminar shear and damage tolerance apart from reducing the cost of manufacturing. Textile industry has the necessary technology to weave high performance multifilament fibers such as glass, aramid and carbon, which have high tensile strength, modulus, and resistance to chemicals and heat into various types of preforms. Depending upon textile preforming method the range of fiber orientation and fiber volume fraction of preform will vary, subsequently affecting matrix infiltration and consolidation. As a route to mass production of textile composites, the production speed, material handling, and material design flexibility are major factors responsible for selection of textile reinforcement production. This opens a new field of technical applications with a new type of semifinished material produced by textile industry. Various types of hybrid yarns for thermoplastic composites and textile preforming methods have been discussed in detail in this issue. Information on manufacturing methods, structural details and properties of different hybrid yarns are presented and critically analyzed. Characterization methods used for these hybrid yarns have been discussed along with the influence of different processing parameters on the properties being characterized. The developments in all areas of textile preforming including weaving, knitting, braiding, stitching and nonwovens techniques are presented and discussed along with the characterization techniques for these preforms. The techniques used for manufacturing composites using hybrid yarns and textile preforms are discussed along with the details on compaction behavior of these structures during consolidation process. The structure of hybrid yarns and the textile preforms have direct influence on the properties of the composite made from them. The reported literature in this aspect is discussed in detail. In the end, the potential application areas and their trends for thermoplastic composites are discussed and analyzed. 相似文献
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碳/芳纶混编三维编织复合材料拉伸性能 总被引:1,自引:0,他引:1
为分析三维编织复合材料拉伸性能和失效机制,分别以碳纤维和芳纶纤维为轴纱和编织纱织造了三维五向、三维六向碳/芳纶混编复合材料。采用数字图像相关法采集试样在单轴拉伸过程中表面全场应变信息得到的泊松比。结果表明:三维编织复合材料泊松比受编织结构的影响较大,同种编织结构下,碳纤维为轴纱的复合材料基本保持了碳纤维三维编织复合材料的拉伸强度和模量,同时提高了断裂伸长率;芳纶纤维为轴纱的复合材料则显著提高了断裂伸长率,但拉伸强度和模量损失较为明显;同种混编方式下,三维五向编织复合材料的拉伸强度和拉伸模量较三维六向高,断裂伸长率无明显差异。编织纱分别为碳纤维和芳纶纤维的三维编织复合材料高应变区分别类似点阵分布和波浪线分布,三维五向和三维六向编织复合材料高应变区分别呈均匀分散分布和横向分布。 相似文献
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纤维强力的测量分为2种:一是单纤维测量,适合于结构和性能较均匀的纤维,如化学纤维等;另一种是束纤维测量,适合结构均匀性较差、力学性能离散较大的纤维,如棉、毛等天然纤维.文章通过实验和数据分析,讨论了束纤维强度测量中测试仪器的参数对实验结果的影响.结果发现,隔距长度和拉伸速度都会对测试结果产生影响.对标准实验提供了一个测量结果较为稳定的区间,对功能束纤维强伸仪的参数设计有参考价值. 相似文献
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碳纤维在高应变率下的断裂机理 总被引:1,自引:0,他引:1
利用反射式间接拉伸Hopkinson杆实验装置对碳纤维进行高应变率拉伸。通过扫描电子显微镜对碳纤维断裂端的断口形状观测表明,碳纤维破坏形态是与应变率相关的,随着应变率的增加,断裂破坏各不相同。但其断口形态逐渐光滑。 相似文献