The concept combines the compression capability of core materials with the high strength low weight characteristics of carbon fiber composites . the basic concept discussed in this paper is presented together with a range of static flexural test results of small and full - scale component experiments 本文主要研究成果如下: 1 、碳纤维复合材料构件的设计要同时考虑材料、结构和工艺三个方面,复合材料的性能与基材的力学性能、成型过程有关。
In this paper application of carbon fiber composite materials for civil aviation was briefly introduced , including application of carbon composites for civil aircrafts , for b777 and airbus a380 - 800 and some views of point for applying composite materials for civil aviation abroad 摘要本文介绍碳纤维复合材料在民用航空上的应用,包括碳纤维复合材料在民用飞机上的应用、在b777和a380 - 800客机上复合材料采用情况以及国外对民用航空上应用复合材料的看法。
In this article , the following technology of the carbon fiber composite flywheel in the integrated energy - storage / attitude - control system are analyzed and the valuable achievements are achieved above the foundation of consulting a large quantity of literatures and investigation : 1 . different technology method for carbon fiber composite flywheel are designed , aimed at the character of carbon fiber composite material and manufacture 2analyzes the stress of carbon fiber composite flywheels made by different technology method , hoop - winding method , symmetric ortho layers pressing method , multi - layer winding method and interference joining method , under high rotate speed , builds their static model ; and simulates their technology and shape parameter ' s affecting their stress level with i - deas f . e . m 本文在查阅了大量国内外相关文献及调研的基础上,针对集成化储能/姿态控制飞轮系统中的碳纤维复合飞轮的以下相关技术进行了研究,并取得了有价值的成果: 1针对碳纤维复合材料的特点及加工方式,设计了周向缠绕成型法、对称正交铺层层压法、多层结构缠绕及过盈连接法等不同工艺方式的碳纤维复合飞轮转子; 2针对不同工艺方式的碳纤维复合飞轮转子,进行了高速旋转状态下的应力分析,建立了静力学解析模型,并结合i - deas有限元分析软件模拟仿真了不同工艺方式的碳纤维复合飞轮转子的相关几何参数及工艺参数对其应力水平的影响; 3
The experimental results of this paper have demonstrated some conclusions as below : ( 1 ) carbon fiber composites and timber can be combined in a very efficient way to produce a new type of composite component that outperforms traditional components in a number of areas . the advantages of the new conceptual component include high load carrying capacity , excellent fatigue behavior , outstanding durability and low weight . ( 2 ) the behavior of this type of component is affected by several parameters , including the performance of composing materials , interface character , the fabric technics and control of the fabric process 2 、通过对28根碳纤维复合材料构件和2根原木构件所进行的抗弯性能试验,得到以下结论: ( 1 )手糊工艺是一种方便实用的复合材料结构构件制作方法,但其最大的弊端在于构件性能的离散性偏大; ( 2 )影响碳纤维复合材料构件抗弯性能的主要参数包括:纵向碳纤维铺设层数、环向抗剪纤维用量、结合面粘结性能以及基材性能等。
Based on signal from carbon fiber composite defects such as lamination , hole , looseners in ultrasonic testing , this paper performs wavelet packet transform on the ultrasonic signals to extract statistics of approximation coefficients and detail coefficients that contain a great part of signal energy as sample - features 摘要本文以碳纤维复合材料常见缺陷分层、孔隙、疏松的超声波检测缺陷信号为研究对象,对超声波检测信号进行小波包变换,提取包含信号绝大部分能量的近似系数波形特征及细节系数的统计量作为样本的特征值。
Currently , the main methods used to measure the fiber / matrix interface properties of composite were based on micro - mechanics , including single - fiber composites fragmentation test ( sfc ) , micro - debonding technique , single - fiber pull - out test , and single - fiber push - out test , in which sfc was most widely used 目前直接用来测定纤维增强复合材料界面力学性能的主要微观力学方法有单纤维复合材料断裂实验( sfc ) 、微脱粘方法、单纤维拔出法、单纤维顶出法,其中以单纤维复合材料断裂实验的应用最为广泛。
In this paper , single fiber composite fragment ( sfc ) method , which is one of the most widespread and effective experimental methods for determining the mechanical properties of interface , was adopted to study the load transfer mechanism and to evaluate the adhesion performance of composite with surface - treated fibers . this is helpful for optimization design of interface 本文采用了目前最为流行、最为有效的直接测定界面力学性能的实验方法之一? ?单纤维复合材料断裂实验研究了纤维树脂界面载荷传递机理,分析了几种纤维表面处理复合材料界面的粘结情况,对界面的优化设计具有一定的指导作用。