【作者】 李强；

【导师】 许家忠；

【作者基本信息】 哈尔滨理工大学 ， 控制工程（专业学位）， 2016， 硕士

【摘要】 在日常的生活生产中,复合材料管件因其可设计性广泛的应用于航空航天、国防、交通等领域。缠绕拉挤管和编织拉挤管因各自性能缺陷所以导致应用领域狭窄,因此良好性能的复合材料管件在管件应用行业中有着广泛的应用前景。在此提出一种复合材料管件制备新工艺：编织-缠绕-拉挤工艺。该工艺原理是在外力作用下的芯轴带动由编织和缠绕的织物通过拉挤成型模具,浸渍树脂的织物通过成型模具的加热和模具挤压作用下固化成型,再将固化成型的毛坯加工管件。编织-缠绕-拉挤工艺并不是单个工艺的简单叠加,缠绕层与编制层的力学性能各异,又相互作用、相互影响,拉挤工艺的挤压和拉伸作用又同时作用于经过缠绕和编织的复合材料,影响其线型以及含胶量；同时新工艺工艺参数对管件固化成型的影响不确定,单纯的实验耗时长且科学性不足,产品质量不被保证。因此本文对编织-缠绕-拉挤工艺进行如下的研究：首先通过分析新工艺管件各层纱线固化成型前后位置分布情况,得出管件编织层与缠绕层纱线位置分布变化关系,从而推导出保证纱线均匀受力的新工艺线型设计要求。根据编织层、缠绕层纱线位置分布的变化情况与管件性能设计要求,分别设计编织线型与缠绕线型。其次在该线型设计的情况下,根据复合材料固化成型原理,建立复合材料管件的传热模型和固化动力学模型,利用有限元软件ANSYS开发复合材料管件固化过程数值模拟程序。通过以三维薄壁管件为模型进行数值模拟,从而分析各工艺参数对新工艺管件固化成型中温度与固化度的影响。通过对管件模拟仿真分析可知,新工艺参数管件初始温度、加温历程、拉挤速度等对管件固化过程的影响规律。同时对制备的管件进行纱线角度的测试,验证可知管件纱线线型设计合理；对管件进行无损检测,结果表明在线型设计的理论指导下的管件无明显损伤；对管件进行在线温度测试,结果表明仿真模拟贴合实际生产工艺,能够指导实际生产。更多还原

【Abstract】 In daily life and industry composite pipe fittings for its design can be widely used in aerospace, defense, transportation and others fields. However composite pipe in some specific areas are not being used The composite pipe which is good performance is a new product of urgent need in the composite material industry. There is a new process called braiding-winding-pultrusion process to produce the composite products. The principle of the braiding-winding-pultrusion pipe is that the braiding and winding fabric on the core shaft is driven through the pultrusion under the action of external force, and that the fabric impregnated by resin is of the solidification under the function of the mould heating and Die extrusion, and that in the end the pipe is got by cutting.Braiding-winding-pultrusion is not the simple sum of individual process. The mechanical property of the braiding layer and winding layer is different. The formation of two layers are under the interaction and influence. The pipe which is braided and winded is under the action of simultaneously extrusion and stretch during the pultrusion. Which leads to change the pattern of yarn and gel content. The influence of the new process parameters on the pipe curing is uncertain. It takes a long time to do simple experiment whose scientificity is insufficient. The product quality is not guaranteed. This paper do the following research on braiding-winding-pultrusion process:firstly, we get the yarn position distribution changes relation of the each layers of pipe. So the new lines design requirement which assure uniform strength on the yarn can be founded. According to the position distribution of the braiding and the winding yarn and the design requirement of pipe properties, this paper designed the braiding lines and winding lines individually. Secondly, under this new kind of the linear design, according to the principle of composite curing, the composite pipe heat transfer model and the curing dynamical model were modeled. We took use of ANSYS developed the curing process numerical simulation procedure. Trough the simulation of three-dimensional resin thin-walled pipe and the experimental verification to analyze that the process parameters affect the curing temperature and curing of the process of forming the new pipe.The influence law of initial temperature of pipes, heating process and pultrusion speed on solidification process of the new process for pipes is attained by the simulation analysis for the fitting. The pattern design of pipe yarn is verified reasonable through the test of yarn angle for pipes. The nondestructive testing is operated on pipes, the result shows that the fitting has no obvious damage under the guidance of the line type theory. The on-line temperature testing is operated on pipes, the result shows that the simulation is identical with the actual production process, which can guide the actual production.更多还原