Evolution of accidentology science, computer engineering and systems of data collection and processing has allowed in recent years, development of border areas that make the connection between life sciences and engineering.This paper tries to prove that this link exists and can be emphasized by using scientific instruments. In recent years, following the development of the automotive industry has increased the need for design and development of systems for testing biofidelity impact of vehicles, since the phase of the virtual model or prototype "zero", with visible effects in improving the safety of road users.In general, it is considered that the development of automotive mannequins to test different types of impact, will lead to continuous improvement of safety of the driver and passengers.

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The present paper approaches some of the main problems that appear during the 3D printing manufacturing process of polymer based objects. Printed parts are not always functional due to many possible faults that appear with the 3D printing process. The paper content briefly presents five of the most common problems noticed in polymer printing. The causes and eventual solutions are described based on several experimental tests. The purpose is to analyze the parameter changes that affect quality of printed parts and to give the solutions for avoiding losses during manufacturing.

The processing of materials with a hardness greater than 55 HRC has always required the use of unconventional or grinding methods in order to obtain the quality and precision required by the technical conditions. For these reasons, the researches of the last decades have developed an unconventional method of processing, with great precision and precision, by assisting the classic processing techniques, with forced, unamortized, low amplitude ultrasonic vibrations. The present paper presents the results of some researches regarding the processing of extradural materials, by the assisted realization of the non-cushioned, low amplitude ultrasonic vibrations. It is demonstrated that this method of processing can obtain very fine surfaces, sometimes being able to replace the grinding, with much lower costs, in terms of energy consumption and tool wear.