StressCheck Tutorial: Incorporating Contact Pressure Bleed in Resultant Extractions
Abstract: The term “bleeding” means that the tractions associated with the contact pressures may not be zero out of the contact region on their way to zero traction. This can affect the calculation of stress resultants, and therefore the load transfer feedback. Selection only the element faces inside the contact zone, or the contact zone itself, may not be sufficient to represent the stress resultant associated with the contact pressure.
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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