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Frame

During the development process of a truck frame, the global stiffness and the durability performance are important design requirements.

Commercial vehicle frames typically have a high number of bolted contact areas. Utilizing linear FE methods is convenient, but does not correctly reproduce the local loading in certain areas of the contacting flanges. This may lead to unrealistic fatigue assessment results.

For a novel lightweight frame segment concept the contact interfaces were detected and the important contact areas identified. The load simulation results including contact analysis with MAMBA provided the input for the subsequent fatigue assessment.

A comparison of the results stemming from a linear FE analysis and the results obtained utilizing the MAMBA simulation process shows significant differences in the predicted damage distributions. 

Benefits

  • Improved accuracy of fatigue assessment results
  • Durability performance evaluation of bolted contact areas
Contact interfaces within the front section of the light weight truck frame

Fatigue assessment of the bolted connection of side rail and cross member shows significant influence of the contact stresses onto the damage results