Temperature uniformity analysis and development of open lightweight composite molds using carbon fibers as heating elements
Temperature uniformity analysis and development of open lightweight composite molds using carbon fibers as heating elements
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DOI：
10.1016/j.compositesb.2013.02.038
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发表时间：
2013-07-01
影响因子：
13.1
通讯作者：
Kostopoulos, V.
中科院分区：
文献类型：
--
作者：
Athanasopoulos, N.;Koutsoukis, G.;Kostopoulos, V.
开发新型复合材料产品最关键的步骤之一是模具的设计和制造。特别是在高端复合材料制造领域，模具和工具的设计构成了一个重大挑战。就cfrp的制造而言，液体复合成型工艺和高压灭菌技术对温度高度敏感。碳纤维的导电能力可用于复合材料制造行业的传热应用。使用碳纤维作为加热元件，可以开发超轻碳纤维增强塑料（CFRP）三明治结构模具，以通过焦耳效应加速树脂流动。本文给出了这种CFRP三明治结构模具的制造工艺。利用组成材料的热学和电学特性，建立数值模型，研究了结晶器的温度场均匀性和加热-冷却速率。为了验证数值模型，使用了热像仪和热电偶，在不同施加功率水平的扁平模具和帽形模具的情况下。(C) 2013 Elsevier Ltd.版权所有。
One of the most critical steps in developing new composite products is the design and the manufacturing of molds. Especially in the high end composite materials manufacturing sector, the design of molds and tools comprises a major challenge. As far as the manufacturing of CFRPs is concerned, liquid composite molding processes and autoclave techniques are highly temperature-sensitive. The ability of carbon fibers (CFs) to conduct electric current can be used in heat transfer applications in the composites manufacturing industry. Using CFs as heating elements, ultra-light carbon fiber reinforced plastic (CFRP) sandwich-structured molds can be developed, in order to accelerate the resin flow via the Joule effect. In the present study, the manufacturing procedure of such CFRP sandwich-structured molds is provided. Using the thermal and electrical properties of the constituent materials, numerical models were built up to study the temperature field uniformity and the heating-cooling rates of the molds. A thermal camera as well as thermocouples were used in order to verify the numerical models, in the case of a flat mold and a hat-shaped mold for different applied power levels. (C) 2013 Elsevier Ltd. All rights reserved.