Helpful Hints and Tips: Application of Bolt-Preload via Multi-Body Contact
Abstract: Two options are available for representing pre-loading of 3D bolted joints:
- Shortening of the bolt shank length to interfere with the plate surface and induce tension on the bolt
- Applying a negative ΔT to the bolt shank elements via a thermal load
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The software provides a highly reliable and user-friendly production stress analysis tool that will replace the Finite Element Method (FEM) tools and failure criteria the experts currently employ for analyzing bonded joints. The software includes an FEM-based handbook format, which allows non-experts to utilize models prepared by specialists. The handbook problems include built-in failure criteria, geometric and material nonlinearities, and the modern FEM technology provides better error control and the treatment of very large aspect ratios.”
Dr. Stephen P. EngelstadTechnical Fellow, Lockheed Martin Aeronautics Company, Structural Methods and Analysis