Influence of fillers on the mechanical properties and failure behavior of filled polymer materials

拟议的研究项目的目的是表征在不同的负载条件下，不同的颗粒对填充塑料的失效机制的影响。对于复合材料中的颗粒而言，颗粒的尺寸、形状和取向以及颗粒与基体之间的界面是影响这些复合材料的力学性能和破坏行为的重要因素。这将采用拉伸、弯曲和剪切载荷类型进行研究。破坏机制将分别在微观和中尺度上进行研究。重要的因素是夹杂物处裂纹的形成，以界面（粘合）和基质（内聚）裂纹的形式以及它们在聚合物基质和夹杂物中的传播。最后，在细观尺度上的故障机制的结果将允许在宏观尺度上的组件的故障机制的评估。在这种情况下，断裂力学和经典的强度方面被认为是。除了一个强大的应用重点，固体力学的基础研究是必需的，特别是有关的J-积分的凝聚力区以及配置力和它们的解释方面的裂纹形成和偏转在混合模式下的加载条件下的接口。

The aim of the proposed research project is to characterize the influence of different particles on the failure mechanisms of filled plastics under different loading conditions. Regarding the particles, their size, shape and orientation in the composite material as well as the interface between particles and matrix are important factors, influencing the mechanical properties and failure behavior of these composite materials. This will be investigated employing the load types tension, bending and shear. The failure mechanisms will be investigated on the micro- and mesoscale, respectively. Important factors are the formation of cracks at the inclusions, both in the form of interfacial (adhesive) and matrix (cohesive) cracks and their propagation, both in the polymer matrix and in the inclusions. Finally, the results of the failure mechanisms on the mesoscale will allow the assessment of the failure mechanisms of components on the macroscale. In this context, both fracture mechanical and classical strength aspects are considered. In addition to a strong application focus, fundamental research in solid mechanics is required, in particular concerning the J-integral of cohesive zones as well as configurational forces and their interpretations with regard to crack formation and deflection at interfaces under mixed-mode loading conditions.