This paper discusses the utilization of nano-sized fillers in Polyamide 6 to increase the fracture resistance of the composites, which are crucial for various engineering applications. The toughening of the composites is achieved by using dispersed nano-scaled rubber particles (Polyether block copolymer) as the inclusion in Polyamide 6 matrix. For a better understanding of the mechanical behavior of the composites, it is indispensable to use analytical and numerical models for evaluating the overall mechanical behavior and damage mechanism of the composite. In this work the toughening mechanism is studied through literature review and by analytical modeling. The mechanical behavior of the composites such as elastic plastic and damage properties are calculated numerically with 3D representative volume element (RVE) models. The numerical results are compared with previously obtained experiments. The influence of volume fraction and aspect ratio of inclusions on the macroscopic stress strain curve as well as the size effect of inclusions and also the failure properties of the composite are studied in detail.
In this work the nanodispersed elastomer copolymer particle-modified polyamide 6 (PA 6) is investigated. Micromechanical modelling is proposed to predict the mechanical behaviour of this material up to failure. A three-dimensional self-consistent embedded unit cell model is chosen which has been well applied for simulating the elastoplasticdeformation of this PA 6-composite [1,. This model will be here modified with the consideration of debonding between the elastomer particles and the PA 6-matrix. The predictions are in very good agreement with the experimental results. In terms of crash behavior, e.g. in the automotive industry the material behaviour under dynamic loading is also of particular interest. Impact strength is one of the most important parameters for describing this material behaviour. A full three-dimensional dynamic simulation of V-notched Charpy impact test is performed in ABAQUS/Explicit. The calculated impact strength coincides plausibly well with the experimental determination.
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