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Novel Strategies for Nonlinear Simulation of Threaded Fastener Joints and Structures: Modeling, Calibration, Failure, and Uncertainty Quantification

John Mersch, Sandia National Laboratories
Jeffrey Smith, Sandia National Laboratories
Matthew Brake, Rice University
Threaded fasteners represent common connectors between parts in assemblies, and analyzing their integrity can be a critical aspect of safety assessment, component/system qualification, and quantifying margin and uncertainties. However, difficulties arise throughout the assessment process that can make this evaluation particularly challenging, including material property uncertainty, calibration challenges, large-scale modeling feasibility, and as-built geometric realities. Thus, engineers must employ wide-ranging techniques to assess the integrity of joints subjected to diverse mechanical environments. This minisymposium aims to highlight many facets of threaded fastener joint computational analysis, including but not limited to:
  • fastener representation and geometric fidelity in finite element models
  • constitutive modeling and material model calibration
  • experimental techniques and model validation
  • reduced-order and surrogate modeling of fasteners
  • plastic deformation and failure analysis
  • fastener performance in high-rate, thermal, multiaxial, and other mechanical environments
  • threaded fastener joint response in normal and extreme environments
  • larger-scale system response with threaded fasteners
  • design evaluation and qualification of systems with threaded fastener joints
  • application of machine learning techniques
  • uncertainty quantification