Abstract
Various software packages offer the possibility to predict the properties of a component by means of simulation at an early stage of development. The used material model is of importance here, to describe the physical material properties.
The focus of the present work is the verification of the geometry of a material sample made of a fiber composite with a rubber matrix, which is a common used material for air spring bellows of the secondary suspension stage of rail vehicles.
At the beginning of this thesis, the field of application of the examined material is shown. Several topics have already been investigated in the air spring bellows research project. A summary is made of the relevant findings of this previous work and the resulting relevance is clarified.
From the current state, it is clear that the examination of a material sample is necessary to determine the mechanical properties of the composite. These serve for a better description of the material behavior in the simulation.
Based on several previous investigations of Mr. Karacsonyi the geometry of the sample has been defined as a at sample. Previous finite element (FE) models for the air spring are used as base for several other model modification variants. These variants are compared and investigated. The 2D image correlation method is used to compare this model with the real measurement on a universal testing machine. Further, the results of the preliminary test, a pure tensile test in the universal testing machine, were compared with the material models and the results of the FE simulation.
In the following of the mentioned analysis a design of a test stand setup for the investigation of the shear behavior of the at specimen is presented. This test bench allows a preload in tensile direction, which meets more realistic circumstances.
Finally, the most important results are presented in a compact form and the benefits of these are shown. Additionally, a recommendation for the further procedure in the outlook is given.
The focus of the present work is the verification of the geometry of a material sample made of a fiber composite with a rubber matrix, which is a common used material for air spring bellows of the secondary suspension stage of rail vehicles.
At the beginning of this thesis, the field of application of the examined material is shown. Several topics have already been investigated in the air spring bellows research project. A summary is made of the relevant findings of this previous work and the resulting relevance is clarified.
From the current state, it is clear that the examination of a material sample is necessary to determine the mechanical properties of the composite. These serve for a better description of the material behavior in the simulation.
Based on several previous investigations of Mr. Karacsonyi the geometry of the sample has been defined as a at sample. Previous finite element (FE) models for the air spring are used as base for several other model modification variants. These variants are compared and investigated. The 2D image correlation method is used to compare this model with the real measurement on a universal testing machine. Further, the results of the preliminary test, a pure tensile test in the universal testing machine, were compared with the material models and the results of the FE simulation.
In the following of the mentioned analysis a design of a test stand setup for the investigation of the shear behavior of the at specimen is presented. This test bench allows a preload in tensile direction, which meets more realistic circumstances.
Finally, the most important results are presented in a compact form and the benefits of these are shown. Additionally, a recommendation for the further procedure in the outlook is given.
| Translated title of the contribution | Mechanical behaviour of a fibre-reinforced flat sample with rubber matrix |
|---|---|
| Original language | German |
| Awarding Institution |
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| Publication status | Published - Feb 2020 |