Proposition Post-Doc

** POSTDOCTORAL RESEARCH OPPORTUNITY **

STRUCTURAL-SCALE LIFE PREDICTION OF AERO-STRUCTURES EXPERIENCING COMBINED EXTREME ENVIRONMENTS

STRUCTURAL SCIENCES CENTER
Aerospace Systems Directorate
Air Force Research Laboratory, Dayton, OH

Project Description:
Combined extreme environments introduce some unique challenges to structural life prediction that go well beyond the obvious, coupled, multi-physics loading regimes. Predicting structural life with high confidence is a complex process, even for conventional aircraft (i.e., sub-sonic/near-supersonic) that experience non-periodic uniaxial or biaxial mechanical loading, because of the uncertainties associated with manufacturing and actual in-service loading profiles. Lifing aero-structures experiencing combined extreme environments requires consideration of additional variables like the thermal and acoustic strain levels, the phase of loading, the exposure temperature, and the duration of exposure at a particular temperature. This translates into a multidimensional limit-state space that needs to be thoroughly probed in order to probabilistically determine the life of the structural component of interest with high confidence. The objectives of this project are to develop methods to probabilistically predict the life of aero-structures subjected to combined extreme environments and also to quantify confidence in the predicted margins of safety on the life.

Desired Qualifications:
Successful candidate will have completed a PhD (or have defended their dissertation by Dec 2013) in a relevant field. Documented expertise and prior experience in one or more of the following areas will be considered when reviewing applicants: (1) Life prediction of extreme environment structures (undergoing thermo-mechanical fatigue, creep, oxidation, etc.); (2) Coupled non-linear structural and thermal finite element analysis; and (3) High temperature mechanical testing. Strong interpersonal skills will also be a plus as the position involves working in a highly collaborative environment and regular interactions with researchers from government, academia, and industry.

Appointment Period:
Initial one-year appointment; renewable for up to two additional years in one-year increments, depending on annual evaluations and funding availability. Desired starting date: December 1st 2013.

Salary and Benefits:
Competitive salary and benefits will be offered for this position.

Application and Inquires:
Applications will be reviewed until the position is filled. Send application as a single PDF file that includes: (a) Detailed academic CV; (b) Unofficial transcripts; (c) Contact information of at least three professional references; and (d) Copies of relevant publications.

Please send applications and direct inquiries to: Dr. Ravi Penmetsa; ravi.penmetsa.1@us.af.mil; 937-656-8799.

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