Modeling of the non-isothermal crystallization kinetics of polyamide 6 composites during thermoforming
Modeling of the non-isothermal crystallization kinetics of polyamide 6 composites during thermoforming
复制标题
聚酰胺 6 复合材料热成型过程中非等温结晶动力学的建模
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
F. Henning
中科院分区：
文献类型：
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作者：
D. Kugele;D. Dörr;Florian Wittemann;B. Hangs;J. Rausch;L. Kärger;F. Henning
连续纤维增强热塑性塑料的热成型工艺与注射成型工艺相结合，在汽车批量生产中具有很高的经济效益。在制造过程中，热塑性层压板最初被加热到熔点以上的温度。然后在成形过程中对材料进行连续冷却，从而在非等温条件下产生结晶。为了考虑热成形模拟中的相变效应，需要对结晶动力学进行精确的建模。在这种情况下，重要的是要考虑在加工过程中观察到的大范围冷却速率。因此，本文采用标准差示扫描量热法（DSC）和快速扫描量热法（Flash DSC）对冷却速率从0.16 K/s到100 K/s的结晶进行了实验研究。两种不同的建模方法(Nakamura模型、改进的Nakamura- ziabicki模型……
The combination of thermoforming processes of continuous-fiber reinforced thermoplastics and injection molding offers a high potential for cost-effective use in automobile mass production. During manufacturing, the thermoplastic laminates are initially heated up to a temperature above the melting point. This is followed by continuous cooling of the material during the forming process, which leads to crystallization under non-isothermal conditions. To account for phase change effects in thermoforming simulation, an accurate modeling of the crystallization kinetics is required. In this context, it is important to consider the wide range of cooling rates, which are observed during processing. Consequently, this paper deals with the experimental investigation of the crystallization at cooling rates varying from 0.16 K/s to 100 K/s using standard differential scanning calorimetry (DSC) and fast scanning calorimetry (Flash DSC). Two different modeling approaches (Nakamura model, modified Nakamura-Ziabicki model...