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120 Forsyth Street, Boston, MA, Boston

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~Date: Tuesday, March 25, 2014

Time: 10:00am to 11:30am (Refreshments from 9:30am to 10:00am)

Location: 206 Egan Center 


Abstract: The inclusion of nonlinearities is necessary to properly characterize the response of many structural systems. Important applications include flexible structures like masts and floating platforms, thin plates under aerodynamic loading, and moment frames under earthquake loading. These structures may all exhibit geometric and/or material nonlinearities in their response. In many cases these nonlinearities, such as buckling, cracking, and plasticity, are indicators of damage, and hence intrinsically link nonlinear analysis and structural health monitoring. In this talk I will introduce my research contributions in experimental and numerical analysis and damage detection of distributed nonlinear structures. The focus will be on the static and dynamic behavior of post-buckled beams, which despite their apparent simplicity, produce surprisingly complex and unpredictable behavior.


Biography: Dr. Wiebe is a postdoctoral researcher at the U.S. Air Force Research Laboratory investigating the nonlinear response of aerospace structures. His current research is focused on developing adaptive dimensionally-reduced models that are capable of accurately reproducing complex nonlinear phenomena without resorting to computationally intractable levels of resolution. At the Air Force Research Laboratory, he has also studied Bayesian damage detection methods, fatigue in lightweight structures, and stability of time integrators. Richard obtained a Ph.D. in Civil Engineering from Duke University in December, 2012. His dissertation research was focused on dynamic snap-through of structures, however, he also worked on foundational concepts in nonlinear dynamics such as bifurcation theory and chaos. Prior to this he obtained his master’s degree from the University of Waterloo in 2009, and his bachelor’s degree from Lakehead University in 2007 in Canada, both in Civil Engineering.

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