Search Results

The study is carried out through numerical and experimental methods. The finite element method is used to simulate the support mechanical behavior via modal analysis, and for the evaluation of stress concentration regions through pressure and thermoelastic static analyses, and dynamic analysis. The fatigue life is calculated for the presented stresses. Stress, acceleration and temperature data were obtained through dynamic test. For material evaluation, chemical analysis, hardness and metallographic analysis were carried out. For thoroughness, a failed support fractography will be presented. The objective of this study is to correlate the data obtained by numerical method with experimental data, and as a result, the support failure mechanism was identified. A modified support is presented to avoid the failure for the determined loads. The support within the proposed modifications reduces the current maximum stress in 41% and improved the fatigue life in 4.99e5 cycles.

The development of the natural gas engines Mercedes-Benz has been constantly improved and used in buses in Germany, Australia, and other countries and also in São Paulo City (Brazil). With the purpose to enlarge of the natural gas engine using, DaimlerChrysler do Brasil developed the first extra heavy-duty truck moved by natural gas of Brazil with the engine M447LAG. The vehicle was applied to draw a moving stage called trio elétrico for the carnival 2001 in Salvador City. The electric power to supply the sound and illumination of the moving stage was produced by generating group moved with 2 natural gas engines M366LAG Mercedes-Benz.