Abstract
The paper presents the results of the analysis of the durability of elastic elements occurring in the special-purpose 4x4 off-road truck suspension using data obtained during an accelerated proving ground test conducted during off-road driving. The limitations in access to material data present at the stage of the initial selection of the component (lack of fatigue strength data) are indicated and an alternative analytical method for fatigue strength estimation is given. The differences in the obtained results and their most important sources are pointed out. A method for using a generalized durability index d as a parameter independent of the subassembly material data is also described. The indicator can be used to assess the influence of resultant loads (recorded) appearing during the vehicle operation in the determined road conditions on the durability of the subassembly under study and to associate their value with the type of the test road section.
Highlights
Vehicle durability evaluation is a very complex and challenging issue, and at the same time necessary in the process of achieving the series-production readiness of a vehicle structure [15]
The received values for the generalized durability index d of the subassembly do not represent the actual life cycle of the component, but only constitute a numerical representation of whether the loads acting on the element are more or less destructive under given traffic conditions compared to another component of the same type
The primary objective of the research was to identify the loads acting on the spring components of the suspension and to estimate their durability limited by fatigue strength, as shown in Table 5 and used as preliminary data to check the suitability of these subassemblies for the vehicle
Summary
Vehicle durability evaluation is a very complex and challenging issue, and at the same time necessary in the process of achieving the series-production readiness of a vehicle structure [15]. In the case of complex objects, e.g., special-purpose off-road trucks that are required to be highly reliable and durable, the design and construction process is organized according to the appropriate management model. An example of such a model can be the V-model [12] developed by NASA. This model assumes that the transition to the stage of the design and construction process is possible only when the previous step is rated positively To have it evaluated, this is necessary to conduct appropriate tests, whose complexity and labor intensity depends on the determination of the impact degree of a given stage on the quality of the final product. The problem remains, the identification of a parameter, the determination of which could be used as a comparative indicator for the initial estimation of the component durability in connection with the selected road test section
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