玻璃纤维增强热塑性塑料在航空航天领域中的应用

研究了玻璃纤维增强热塑性塑料（GRTP）的分类,短玻纤增强热塑性塑料（SFT）,玻纤毡增强热塑性塑料（GMT）,长纤维增强热塑性塑料（LFT）3种类型的特性和制备方法。介绍GRTP在军用飞机和民用飞机等航空航天领域的应用情况。总结了未来纤维增强热塑性复合材料的发展方向。     

长玻纤增强热塑性塑料的市场应用前景

本文介绍了长玻纤增强热塑性复合材料国内外的发展现状,长玻纤增强热塑性复合材料国外典型牌号以及在汽车领域的应用及市场前景。     

长玻纤增强热塑性塑料注射成型技术

简述了长玻纤增强热塑性塑料复合材料的性质及其应用,详细介绍了用于"一步法"、"两步法"注射成型长玻纤增强热塑性塑料复合材料的原理、设备及其发展历程与最新进展。     

长玻纤增强复合材料老化研究进展及防老化研究

综述了以热塑性材料为基体树脂的长玻纤增强复合材料结构分析,阐述了长玻纤增强热塑性复合材料在湿热、热氧、光氧条件下有可能的老化机理。最后提出了几点长玻纤增强热塑性复合材料防老化的建议措施。     

玻纤增强基材的创新与发展

分析了当今下游复合材料工业的发展对玻纤增强基材发展的需要。重点介绍了风电叶片用玻纤纱、技术织物、复合织物、预浸渍制品、预成型增强体等各类玻纤增强基材以及增强热塑性塑料用的短切纤维、混合纱、LFT、GMT、GMT-D、LFT—D、增强热塑性片材等各类玻纤增强基材。并为玻纤增强基材如何促进这两类复合材料产品的发展提出建议。     

长玻纤增强热塑性塑料的市场应用前景

介绍了长玻纤增强热塑性复合材料国内外的发展现状、技术和工艺、成分、玻璃纤维、喂料系统概况,并对长玻纤增强热塑性复合材料国外典型牌号,在汽车领域、机电行业、家电行业以及通讯、电子、电器行业的应用及市场前景做了阐述。     

玻纤增强热塑性复合材料界面结晶行为研究进展

综述了玻纤增强热塑性复合材料界面结晶的形成机理及其研究进展,从结晶动力学的角度深入阐述了不同晶型(α晶和β晶)横晶的形成条件和结构特点,全面归纳了横晶形成的各种影响因素及研究者的不同观点,详细讨论了横晶对玻纤增强热塑性复合材料力学性能的影响,展望了热塑性复合材料界面结晶行为的研究动态。     

玻纤增强热塑性复合材料超声波焊接方法研究

基于对ECR玻纤增强热塑性复合材料的力学和热物理特性以及普通工程塑料超声波焊接理论的研究,借鉴普通工程塑料超声波焊接方法,提出了超声波焊接ECR玻纤增强热塑复合材料制件的新思路;探讨了超声波在ECR玻纤增强热塑性复合材料中的传播及焊接机理。通过调整超声时间、保压时间、焊接压力等工艺参数,使用普通超声波塑料焊机成功焊接了ECR玻纤增强PA66试件。力学性能测试和断口微观组织观测表明,试件焊接区结合良好。     

硅烷偶联剂在玻纤增强复合材料领域中的应用

介绍了玻纤生产中常用硅烷偶联剂的种类、结构、偶联机理及使用方法。着重介绍了硅烷偶联剂在玻纤增强复合材料中的应用,特别是硅烷结构类型、用量对复合材料性能的影响。同时,对硅烷偶联剂的作用及其在玻纤增强热固性和热塑性树脂中的应用进行了阐述。     

玻纤增强热塑性复合材料多尺度建模与各向同性曲线拟合

基于玻纤增强复合材料玻纤取向3D计算的Moldflow旋转扩散(MRD)模型对玻纤增强热塑性复合材料(PA66-G30)的标准1BA样条注塑填充过程中的玻纤取向张量进行计算。以14层玻纤取向张量分布和厚度数据为基础,建立该复合材料多层微观代表性体积元(RVE)模型,采用J2幂乘硬化弹塑性模型来拟合实验测试应力-应变曲线,完成该玻纤增强热塑性复合材料多尺度模型的构建。基于该材料模型生成的45°取向的应力-应变曲线与实验结果吻合良好,验证了本实验材料模型的准确性。基于该模型生成了PA66-G30材料的各向同性应力-应变曲线,用于提高注塑产品力学仿真计算的精度。     

热塑性复合材料制件热残余应力产生原因及测试方法分析

纤维增强热塑性复合材料以其优异的综合性能被广泛用于大型民用飞机结构,但在复合材料成型过程中基体材料需要经历较高的工艺温度和降温速率;增强纤维和聚合物基体之间因热膨胀系数不匹配、铺层间各向异性和温度的梯度分布等因素将导致在基体中形成热残余应力,这将对所得热塑性复合材料构件的力学性能产生影响,需要在复合材料结构的设计和分析中加以考虑。为有效控制和降低复合材料制件中热残余应力,需要对其产生来源及发展机理进行分析。对热塑性复合材料中热残余应力的形成原因从三个不同层次进行讨论,并分析热塑性复合材料在成型过程中残余应力水平的控制方法,最后对热残余应力的测试方法进行研究,评价了各测试方法的优缺点。     

碳纤维增强热塑性树脂基复合材料的研究现状

综述了国内碳纤维增强聚酰胺（PA6）、聚醚砜（PES）、聚碳酸酯（PC）、聚苯硫醚（PPS）、聚醚砜酮（PPESK）,聚醚醚酮（PEEK）、热塑性聚酰亚胺（PI）等热塑性树脂基复合材料研究现状,对比了热固性树脂基复合材料与热塑性树脂基复合材料性能及成型工艺方面的差异,并对碳纤维增强热塑性树脂基复合材料的成型方法,碳纤维...     

高性能热塑性树脂基复合材料的研究进展

近些年来,纤维增强热塑性树脂基复合材料已逐步发展成为复合材料中一个高性能、低成本的新型材料家族。本文主要介绍了各种高性能工程塑料和增强纤维的发展,连续纤维增强热塑性树脂的浸渍工艺及成型工艺,最后还介绍了热塑性纤维复合材料的发展趋势。     

热塑性树脂基复合材料激光原位固化研究进展

鉴于热塑性树脂基复合材料激光原位固化技术在武器装备制造领域的巨大应用前景,为促进激光原位固化复合材料成型技术发展,本文在对激光原位固化成型技术进行国内外的研究和应用总结基础上,对激光原位固化过程所涉及的机理进行了讨论,对激光原位固化实验研究进行了总结,对固化过程中的温度场仿真进行了论述,同时对该技术在航空航天领域的发展...     

Feasibility of foam forming technology for producing wood plastic composites

Cellulose fiber-containing thermoplastic composite materials are being used in an increasing number of applications produced typically by injection molding and extrusion processing methods. One potential way to manufacture thermoplastic cellulosic fiber composites is foam forming technology developed originally for paper manufacturing. This article compares the low-density polyethylene (LDPE) and unrefined northern bleached softwood kraft pulp (NBSKP) composite materials prepared with foam forming, extrusion, and injection molding. The results show that the foam forming enabled three times higher Charpy impact strength properties and 68% higher tensile modulus compared to injection molded 30% NBSKP fiber-containing LDPE composites without changes in composite color. Foam forming is a potential large-scale manufacturing method for thermoplastic composite sheets used, for example, in compression molding or thermoforming.     

Synthesis and characterization of melt-processable polyimides derived from diaminodiphenylsulfone and benzophenone tetracarboxylic dianhydride with excellent heat resistance and thermoplasticity

Polyimide has excellent heat resistance, dielectric properties, and mechanical properties, and has a wide range of applications in aerospace, electronic packaging, and insulating materials. However, traditional polyimide is difficult to melt and dissolve, and its processing is difficult, which has become an important reason limiting its practical application. Therefore, the development of high temperature-resistant thermoplastic polyimide has become a research hotspot. To prepare high temperature-resistant thermoplastic polyimide materials, a series of thermoplastic polyimides was successfully prepared using 3,3′,4,4′-benzophenone tetracarboxylic dianhydride, 3,3′-diaminodiphenylsulfone, 2,3′,3,4′-benzophenone tetracarboxylic dianhydride, 9,9-bis(4-aminophenyl)fluorene, and 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane via a two-step method. The effects of non-coplanar structure and bulky groups on the solubility, processability, and thermal properties of polyimide were studied. The structure, heat resistance and thermoplasticity of polyimide were characterized via various methods. The results show that the glass transition temperature of the prepared thermoplastic polyimide is between 292 and 302°C, and has excellent thermal resistance. The processing viscosity of polyimides is as low as 9210 Pa.s, and it has a certain degree of processing properties. It may be designed to be used in high temperature-resistant hot melt adhesives for structural components, high temperature-resistant melt processing resins, or thermoplastic composite materials used in the field of aerospace in the future.     

热塑性木塑复合材料研究进展

热塑性木塑复合材料（WPC）是一种兼有木材的力学性能和热塑性塑料易加工的新型材料。阐述木塑复合材料国内外最新研究进展和应用前景。指出热塑性木塑复合材料作为一种新型环保材料,具有广阔的应用前景。     

Non-metallic pipe systems for use in oil and gas

Abstract

This paper relates to the expanding use of non-metallic materials in piping for the transport of oilfield fluids, onshore and offshore. Qualification processes for thermoplastic and composite pipework all involve long term stress rupture tests to establish a relationship between pressure and time to failure. These qualification tests are needed to account for particular long term failure process that occur in non-metallics, and are essential to the successful application of these materials. Uses of both thermoplastics and composites in several types of pipework are discussed. These include fibreglass pipe, spoolable thermosets, reinforced thermoplastic pipe, flexible risers, rigid risers and, finally, repair and rehabilitation.     

结构型吸波复合材料研究进展

介绍了结构型吸波复合材料的发展历程,重点阐述了国外热塑性混杂纱型、多层结构和夹芯型、耐高温型和智能型结构吸波复合材料的最新进展,表明结构型吸波复合材料是一种多功能复合材料,它既能作为承载结构件,具备复合材料轻质高强的特点,又能吸收电磁波,是当代吸波材料发展的主要方向。并结合结构型吸波复合材料的优化设计方法,指出了结构型吸波复合材料未来发展的方向。     

Minimum-gage,maximum-stiffness graphite/thermoplastic spacecraft structures

Advanced thermoplastic matrix composite materials have been studied for use in aircraft applications since about 1980. This Strategic Defense Initiative Organization/Air Force project was initiated in 1987 to study the suitability of this class of materials for use in spacecraft applications. This paper will report on the following work in progress: development of ultrahigh-modulus, pitch-fiber-reinforced thermoplastic composites; development of thin-ply graphite/thermoplastic materials for gage-limited spacecraft applications; and producibility demonstrations for generic spacecraft structures including open frames and T and L members, circular and square-tube truss configurations, and stiffened-skin modules.