长玻璃纤维增强聚丙烯复合材料成型工艺与实验研究

发布时间：2018-01-14 19:04

本文关键词：长玻璃纤维增强聚丙烯复合材料成型工艺与实验研究　出处：《湖南大学》2016年硕士论文　论文类型：学位论文

【摘要】：汽车轻量化是解决能源和环境问题的重要途径之一,对汽车工业的可持续发展有着重要意义。纤维增强聚合物基复合材料在车身结构上的应用已成为汽车行业的一个发展趋势。长玻璃纤维增强聚丙烯复合材料(Long Glass Fiber Reinforced Polypropylene,LGFRP)具有密度小、综合性能好、可设计性强、性价比高以及可回收利用等特点,在汽车车身上的应用越来越广泛。本文以LGFRP复合材料在车身结构上的应用为研究背景,采用分类和分割的方法对LGFRP复合材料的制备与模压成型进行了研究,进一步分析了LGFRP复合材料的力学性能,并对LGFRP预浸渍材料的成型工艺及工艺参数进行优化。具体研究内容如下:(1)LGFRP复合材料的结构类型与制备工艺研究为方便复合材料的成型工艺研究,本文针对模压成型工艺把LGFRP复合材料分为混纤毡、叠层复合材料和预浸渍板三种类型,分别分析了各类型材料的结构和性能特点,并开发出一种新型预浸料;同时,分析了三类材料的制备工艺和制备原理,并根据材料结构特点和制毡工艺设计出一种多轴向交叉铺网机。(2)LGFRP复合材料的成型工艺与试制实验研究成型条件对复合材料的力学性能有着重要影响,本文根据成型中材料的变化把模压过程细分为不同部分,然后分别对各部分进行实验研究,分析各工艺参数对材料性能的影响机理,并根据不同类型材料选择合适的成型工艺和工艺控制参数;最后,根据探讨的成型工艺建立LGFRP复合材料模压成型试制线,对LGFRP复合材料进行试制实验分析。(3)LGFRP复合材料试制件的力学实验分析为指导实际应用中模压材料的选择,本文在模压成型试制线上分别对混纤毡、叠层复合材料和预浸渍板三类材料进行模压成型,分析各材料的拉伸、弯曲和冲击性能,并对比各材料的性能差异。(4)LGFRP复合材料模压成型工艺及工艺参数优化为提高LGFRP复合材料模压制品的基本力学性能及其性能的稳定性,本文针对LGFRP预浸渍材料的模压工艺参数,把模压成型过程细分为预热工序、模压工序、成型操作和成型设计四个部分,分别分析各部分参数对材料力学性能的影响,并优化得到最佳成型工艺参数。
[Abstract]:Lightweight vehicle is one of the important ways to solve the problem of energy and environment, is of great significance to the sustainable development of the automobile industry. The application of fiber reinforced polymer composites in the body structure has become a development trend of the automotive industry. Long glass fiber reinforced polypropylene composite (Long Glass Fiber Reinforced Polypropylene, LGFRP) has the advantages of low density, good comprehensive performance, strong in design, high cost and Recyclable utilization etc., are applied in the car more widely. In this paper, LGFRP composite materials used in the body structure as the research background, the methods of classification and segmentation of LGFRP composite was prepared by research and molding, further analysis of the mechanical properties of LGFRP composites, and the forming process and process parameters of LGFRP prepreg were optimized. The specific research contents Are as follows: (1) LGFRP composite structure and preparation process for the study forming process convenient composite material, the molding process of LGFRP composites are divided into mixed fiber mat, laminated composite plate and pre impregnated three types, respectively analyzes the structure and characteristics of various types of materials. And developed a new type of prepreg; at the same time, analyzes the three kinds of materials preparation process and principle, and according to the structure characteristics of the material and felting process to design a multi axial corsslapper machine. (2) has an important effect on LGFRP composite molding technology and experimental study on forming conditions of trial the mechanical properties of composite materials, according to the change of materials in the molding molding process is divided into different parts, and then each part of the experiment, the mechanism analysis of various process parameters on the properties of materials, and according to the different The type of material forming process and process parameters are appropriate; finally, according to the forming process of LGFRP composite molding manufacture line, are manufactured on the experimental analysis of LGFRP composite material. (3) analysis of LGFRP composite trial mechanics experiment for moulding material application guidance in the selection, the molding manufacture on line respectively mixed fiber mat, laminated composite plate and pre impregnated with three kinds of materials of molding, the material analysis of tensile, flexural and impact properties, the performance difference between material and contrast. (4) LGFRP composite molding technology and optimization of process parameters in order to improve the stability of the basic mechanical properties and properties of LGFRP composite the material of molded products, the molding process parameters of LGFRP prepreg, the molding process was divided into preheating process, molding process, molding and operation Four parts are designed to analyze the influence of the parameters of each part on the mechanical properties of the material, and optimize the optimum processing parameters.

【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U466

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