This paper contains numerical analysis of brake system for heavy (mass m=6400[kg]) transport car. Analysis was performed in order to correct existing non optimal brakes in mentioned car. Analysis was based on results of the brake system dynamic tests made in Landing Gear Laboratory Institute of Aviation in Warsaw, Poland. Authors describe analytical process which led to generate results for new parameters of more efficient braking system for heavy transport car.
The paper presents a new way of hyperelastic materials specimens testing. For some time now Finite Element Method (FEM) Software allows to calculate stress in this kind of materials which make an engineering work easier. Unfortunately the results of the classical hyperelastic materials tests done so far do not give a possibility to use full abilities of FEM software. Furthermore, the attempts of conversion of classical type of data to FEM expected ones, do not lead to a correct solution. Such input data are accepted by software, but not physically correct. The specimens used for new types of elastomer tests are completely different, they are of different shape, they have to be hold and measured in a different way. These differences are described in the paper. PROBLEM STATEMENT All experiments defined by ISO or ASA are the tests which can deliver a lot of important information. Unfortunately most of this information is not appropriate to apply in mathematical material models used by FEM software. Only few laboratories or manufactures give more data then Shore hardness, IRH hardness, abrasiveness, temperature resistance, fluids resistance, oxidation resistance and others defined by standards. Mathematical models are non-linear models, it means that data in numerical form-as one single number representative-is not usable. Expected data is a set of stress/strain functions in discrete form (Fig. 1). Such tests are provided, but in a different way than expected. Most popular in this group of tests is the simple tension test.
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