Abstract
Polymers are currently used in several industrial applications such as the interior components of the vehicle. We find them for example in the design of dashboards or door panels. These materials may be subjected to different types of load like the temperature variation or high strain rates due to crash impact. It is therefore necessary to well understand and to anticipate the complex mechanical behaviour of the polymers. This paper describes the results of experimental research about the dependence between the strain rate and the temperature. The main objective is to be able to model the complete variety of the behaviour in order to predict the risk of failure under dynamic loadings. The material chosen for this study is a copolymer propylene ethylene mineral (talc) filled 15% impact modified.
Highlights
Automotive industry is a field activity which is subject to constant change
We find them for example in the design of dashboards or door panels
This paper describes the results of experimental research about the dependence between the strain rate and the temperature
Summary
Automotive industry is a field activity which is subject to constant change. The car manufacturers and the suppliers always need to adapt to the change of the mentality and the society to propose some new technologies. For example the polymers have progressively replaced other materials such as the steels thanks to their mechanical properties They offer the advantage to be more lightweight and usually more ductile in function of additional additives. It is essential to understand the complex behaviour of polymer under a wide range of strain rate and temperature to be able to model the complete range of these behaviours from very ductile to fragile behaviour with the objectives to predict the risk of failure under dynamic loadings To reach this objective, the first step consists on an experimental characterisation study of a copolymer propylene ethylene mineral (talc) filled 15% impact modified (used in the design of the top cover) at different temperatures [-30 °C to +85 °C] under dynamical loads until 300 s. A relation is defined to link these two effects and is introduced into the model of Balieu[1, 2] to model the polymer behaviour under a large temperature range
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