Abstract
In the research paper we present a study regarding the road traffic safety and the ageing phenomenon of vehicle bumpers. For our study we used the accelerated ageing in conventional environment which is the most complex and comprehensive method to determine the bumper ageing. This method is used for plastic materials and comprehends ageing methods which simulates the natural exposes: taking into account the temperature, humidity and the presence of some chemicals, oils and fuels. Also, the method consists in the ageing of plastic materials which initially were conditioned in climatic chamber. The final evaluation happens when the object we study is tempering to the ambient temperature in the same climatic chamber (T = 23°C ± 2°C , UR = 50% ± 5%). Keywords: ageing, strength depreciation, stress, strain, rheology, fracture