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For many years durability tests engineers have worked in the sense of improving the tests that, at first, were performed using public roads with high time consumption and low reproducibility. Proving grounds were specially designed to reproduce the most important efforts to the body and chassis systems, but time problem was still there. Time and cost reduction allied to the needs of quality, reliability and reproducibility improvement led the engineers to develop methods and equipments to reproduce the durability tests in the lab. In this way the road simulators appear as a powerful tool able to perform durability tests with high reliability, self-controlled and with very low time compared to the road tests. At this scenery bench tests were also created to components and systems mainly used to anticipate problems before a whole vehicle test.

Time and development cost reduce is nowadays a basic premise of automotive industry. Connected with this, many efforts have been done in the sense of design lighter structures, what involve in gas consumption reduction and improvement of vehicle performance. The accelerated tests contribute in time and development cost reduction, since the tests are planned in according to have a short time execution so reducing the period of the experimental validation step. The use of fatigue analyze techniques can aid in time reduction of test execution. The purpose of this work is study, based on stress analysis, the most severe grounds for the vehicle suspension attach points. The severity will be defined in according of the calculated stress through von Mises criterion, using the cumulative damage theory.