Leon Angel, Perez Marta, Barasinski Anaïs, Abisset-Chavanne Emmanuelle, Defoort Brigitte, Chinesta Francisco
ESI Group, 3bis rue Saarinen, 94528 Rungis CEDEX, France.
GeM, Ecole Centrale Nantes, 1 rue de la Noe, 44300 Nantes, France.
Nanomaterials (Basel). 2019 May 4;9(5):695. doi: 10.3390/nano9050695.
This paper concerns engineered composites integrating metallic particles to enhance thermal and electrical properties. However, these properties are strongly dependent on the forming process itself that determines the particle distribution and orientation. At the same time, the resulting enhanced thermal properties affect the reinforced resin viscosity whose flow is involved in the intimate contact evolution. Thus, a subtle and intricate coupling appears, and the process cannot be defined by ignoring it. In this paper, we analyze the effects of particle concentration and orientation on the process and processability. For this purpose, three main models are combined: (i) a multi-scale surface representation and its evolution, by using an appropriate numerical model; (ii) flow-induced orientation, and (iii) the impact of the orientation state on the homogenized thermal conductivity.
本文关注的是集成金属颗粒以增强热性能和电性能的工程复合材料。然而，这些性能在很大程度上取决于决定颗粒分布和取向的成型过程本身。同时，所产生的增强热性能会影响增强树脂的粘度，而树脂的流动涉及到紧密接触的演变。因此，出现了一种微妙而复杂的耦合，不能忽略这种耦合来定义该过程。在本文中，我们分析了颗粒浓度和取向对该过程及可加工性的影响。为此，结合了三个主要模型：(i) 使用适当的数值模型对多尺度表面表示及其演变进行建模；(ii) 流动诱导取向；(iii) 取向状态对均匀热导率的影响。
