Sinan Filiz

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We propose a fast stiffness matrix calculation technique for nonlinear finite element method (FEM). Nonlinear stiffness matrices are constructed usingGreen-Lagrange strains, which are derived from infinitesimal strains by adding the nonlinear terms discarded from small deformations. We implemented a linear and a nonlinear finite element method with the same(More)
This paper presents an analysis of the actuation requirements of the flexible spline of a harmonic motor. The analysis accounts for the initial strain distribution required to bring the flexible spline into contact with the rigid spline, and proceeds to the derivation of the additional stress required to produce a given contact force for torque generation.(More)
Polymeric micro-/nanofibers are finding increasing use as sensors for novel applications. Here, we demonstrate the ability to deposit an array of poly(methyl methacyrlate) fibers with micron and submicron diameters in aligned configurations on customized piezoelectric shakers. Using lateral motion of an atomic force microscope tip, fibers are broken to(More)
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