Applied Mechanics and Materials Vol. 822

Abstract: In the conditions of the accentuated globalization and marked by a strong economical concurrence, the development of the present society imposes a new type of education. This must take into account all dimensions of the human being because our whole individual and social life is structured by education. The confirmation of the creative valences of Mechatronics in all fields makes possible the appearance of a new philosophy compatible with the actual technological and informatical development in society. At the base of the Mechatronics’ principles in Education is situated the development of the systemic thinking and the formation of the work abilities in team based on the informatics role in all fields. In mechatronic Education is followed by the formation of the information, mental action and social skills.

Abstract: The author’s present concerns about the study opportunities offered by the control unit (which allow experimental programming) related to viewing, adjusting and recording certain engine operating parameters. For a dedicated power supply solution (in which we find an own admission variant of route) functional enhancements the related to the settings type of injection, number of injections, injection time and air mixture – fuel, are proposed. Performance evaluation, approached in a sequence type identification system was done using a testing methodology specific to the chassis dynamometer bench to highlight the targeted optimizations.

Abstract: In this paper we have build a new composite bar with polypropylene honeycomb core reinforced with steel wire mesh. We have loaded this bar in several variants and we have recorded the stress per unit mass values. Then, we have loaded various metallic beams in the same way and we record for them the stress per unit mass values. In the end, we will highlight the strength increase or decrease if we use the composite bar instead of the classical metallic beams.

Abstract: This paper is a review of the current research on bio-source composite and especially flax fibers reinforced polymers. Fabrication methods and fiber treatments are presented.The mechanical properties found in the scientific literature are discussed.Experimental results from traction tests are presented for a bio-source composite: epoxy resin reinforced with flax fibers.

Abstract: This paper presents mathematical models derived from the study of the chemical composition and mechanical properties of aluminum alloy type 6082 AlSi₁MgMn. They were determined based on the study of the chemical composition of 30 batches of alloy 6082 and their mechanical properties. Mathematical models obtained were checked by Fisher test, and the two of them had the optimal coefficient of determination. Aluminum alloy was hot rolled and hardened through heat treatments.

Abstract: The design of layered composite body elements requires knowledge of the behavior of these materials under operating conditions of the vehicle. The experimental researches were carried out on material produced in the laboratory and have been determined the change in bending and rolling characteristics at temperatures of 80°C, -30°C and in humidity conditions. Also it was attempted to determine aspects regarding the causes and mechanism when these conditions affect the changes of the mechanical properties.

Abstract: Based on the requirements of achieving lightweight components and mechanical performance, the paper aims to present the structure of technology for use fiber reinforced plastics, especially plastics reinforced with carbon fiber wrap winding space technology and additional tests results for steering column console.

Abstract: This study proposes an experimental-numeric method to identify the viscoelastic properties of flax fibres reinforced composite laminate (flax/epoxide). The used method consists in identifying the evolutions of both loss factor and stiffness when vibrational frequency changes. In this way, several free-free symmetrically guided beams are excited on a dynamic range of 10 to 4000 Hz with sweep sine excitation focused around the 4-first’s modes. Fractional derivative Zener model is used to identify the on-axis ply complex moduli and describe the laminate dissipative linear behavior with the classical laminate theory. Results obtained on a quasi-isotropic laminate show that this model adequately predicts the vibrational behavior of the tested laminates.

Abstract: Titanium has excellent mechanical properties, low density, high chemical stability, good heat transfer properties and a good corrosion resistance. In recent years, a new process technology is emerging by which titanium and titanium alloys can be made by sintering titanium hydride (TiH₂) and its mixture with alloying elements. The feasibility of this manufacturing approach has been fully demonstrated from powder to sintering and from microstructure to mechanical properties. This paper describes a study concerning Powder Metallurgy (PM) technology processing of Ti by conventional PM and non-conventional PM method such as Spark Plasma Sintering (SPS) route. The influence of the technological parameters on the micro-hardness and SEM microstructures during bulk titanium materials processing has been studied. The STATISTICA program has been used to monitor the influence of the technological parameters on the micro-hardness of bulk titanium processed products. The tribological behaviour of the bulk titanium materials on the basis of the coefficient of friction and wear rate is presented, too.

Abstract: Analysis of failure modes and effects (FMEA) is a method of analyzing the potential failure of a product or process, to develop an action plan aimed at their prevention and increased quality of products, processes and job production environments. As a method of critical analysis, FMEA has very clear objectives aimed at: determination of the weaknesses of a technical system; initiating causes of failure-seeking components; analysis environmental impacts, safety of operation, the product value; provision of corrective actions to remove the causes of the occurrence of defects; provision of a plan to improve product quality and maintenance; determining the needs of technology and modernization of production; increasing the level of communication between departments working people hierarchical levels. FMEA should be used before taking the product. There is no point subsequently, only because customer demands, to achieve FMEA. Therefore, FMEA must be within organizational conduct. Using timely analysis FMEA - Process avoid costly modifications of the technological achievement assembly "stator Housing" by identifying potential defects, avoidance and risk and potential consequences of faults. We studied the potential causes of defects and have proposed improvements. Among these are: implementing and tracking preventive maintenance program; providing specific compliance welding; acquisition of a specialized table seating and download the blank; purchasing a scarfing machine.