N&R Engineering + U.S. Air Force

N&R Engineering is excited to announce a new project funded by the U.S. Air Force that will commence this summer.

Our proposal on improved probabilistic design and life prediction methods for composites was selected in the Air Force’s most recent SBIR (Small Business Innovative Research) competition.

What is our goal?

The goal of this project is to reduce the cost of durability assessments and fatigue life prediction (with validation), and will use composite bolted joints as the test case for demonstration.  A validated life model will reduce the burden of qualification testing.

N&R Engineering will be employing a variety of technical objectives to see this project through including: implementing a multi-scale finite element analysis simulation of a composite bolted joint fatigue test, developing a Bayesian uncertainty quantification (UQ) framework, and demonstrating the use of a UQ framework for an optimal test matrix for experimental fatigue tests of PMC bolted joint sections.

Upon completion of this project, N&R Engineering will present the following deliverables:

  • Literature review regarding the sources of experimental errors in composite bolted joint static and fatigue testing
  • A representative example of multi-scale structural fatigue analysis of a composite bolted joint
  • Software module for the Bayesian framework
  • Test matrix for Phase 2 experimental tests

Falling directly under our umbrella of capabilities, this project serves as one of excitement for our company!

If you have any questions regarding our capabilities or work portfolio, please contact us.

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