PhD Proposal Defense by August T. Noevere

Event Details
  • Date/Time:
    • Monday March 7, 2016
      8:00 am - 10:00 am
  • Location: 325 Montgomery-Knight Building, School of AE
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Summaries

Summary Sentence: RAPID DETERMINATION OF MASS AND STIFFNESS DISTRIBUTION ON PRIMARY SKIN-STIFFENER STRUCTURES

Full Summary: No summary paragraph submitted.

COMMITTEE:

Prof. Alan Wilhite (retired), School of Aerospace Engineering

Jeffrey A. Cerro, NASA Langley Research Center

Prof. Graeme J. Kennedy, School of Aerospace Engineering

Prof. Daniel P. Schrage, School of Aerospace Engineering

 

ABSTRACT:

 

In modern conceptual/preliminary design of aerospace vehicles it is common for a large number of concepts and configurations to be rapidly explored. For each configuration, the structures discipline is responsible for determining an internal structural arrangement and detailed component design that minimizes mass while supporting external loads and other requirements. This is especially challenging for structures with stringent stiffness requirements such as those from global buckling or aeroelasticity. The proposed research presents a methodology suited for rapid design of structures which is capable of optimizing mass while easily meeting these requirements. Specifically, the methodology focuses on the stiffened panel optimization problem for metallic and composites. A change of variables is performed to allow accurate linearization of the design space, thereby greatly increasing optimization efficiency. The stiffened panel design space is recast in terms of equivalent smeared stiffness, using terms from the [ABD] stiffness matrix. This reformulation is enabled by the use of response surface equations to map the panel failure criteria (such as material failure, local buckling, etc.) to be a function of stiffness terms only. The resulting linear design space can be quickly optimized with the Simplex Algorithm. Thus, the approach is able to perform physics-based panel optimization with a level of efficiency appropriate for conceptual design studies.

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PhD proposal defense
Status
  • Created By: Jacquelyn Strickland
  • Workflow Status: Published
  • Created On: Mar 1, 2016 - 1:00pm
  • Last Updated: Oct 7, 2016 - 10:16pm