Department of Mechanical Engineering

Microfluidic bio-particle manipulation for biotechnology

Cetin, B.; Ozer, M. B.; Solmaz, M. (Elsevier, 2014-11-15)

Microfluidics and lab-on-a-chip technology offers unique advantages for the next generation devices for diagnostic therapeutic applications. For chemical, biological and biomedical analysis in microfluidic systems, there ...

Predicting pilot behavior in medium-scale scenarios using game theory and reinforcement learning

Yildiz, Y.; Agogino, A.; Brat, G. (AIAA, 2014-05-08)

A key element to meet the continuing growth in air traffic is the increased use of automation. Decision support systems, computer-based information acquisition, trajectory planning systems, high-level graphic display ...

Nonuniform friction-area dependency for antimony oxide surfaces sliding on graphite

Ritter, C.; Baykara, M. Z.; Stegemann, B.; Heyde, M.; Rademann, K.; Schroers, J.; Schwarz, U. D. (American Physical Society, 2013-07-15)

We present frictional measurements involving controlled lateral manipulation of antimony nanoparticles on graphite featuring atomically smooth particle-substrate interfaces via tapping- and contact-mode atomic force ...

Simultaneous measurement of multiple independent atomic-scale Interactions using scanning probe microscopy: data interpretation and the effect of cross-talk

Baykara, M. Z.; Todorovic, M.; M?nig, H.; Schwendemann, T. C.; Rodrigo, L.; Altman, E. I.; Perez, R.; Schwarz, U. D. (American Chemical Society, 2015-03-05)

In high-resolution scanning probe microscopy, it is becoming increasingly common to simultaneously record multiple channels representing different tip-sample interactions to collect complementary information about the ...

Tactile perception by friction induced vibrations

Fagiani, R.; Massi, F.; Chatelet, E.; Berthier, Y.; Akay, A. (Elsevier, 2011-09)

When a finger moves to scan the surface of an object (haptic sensing), the sliding contact generates vibrations that propagate in the finger skin activating the receptors (mechanoreceptors) located in the skin, allowing ...

Trapping of vibration energy into a set of resonators: Theory and application to aerospace structures

Carcaterra, A.; Akay, A.; Bernardini, C. (Elsevier, 2012-01)

This paper presents the theory of a novel mechanism of energy absorption and induced damping in structural systems and its application to aerospace industry. The underlying principles of the physical phenomena have been ...

Noncontact atomic force microscopy II

Baykara, M. Z.; Schwarz, U. D. (Baykara and Schwarz, 2014-03-12)

Background: Highly ordered three-dimensional colloidal crystals (supracrystals) comprised of 7.4 nm diameter Au nanocrystals (with a 5% size dispersion) have been imaged and analysed using a combination of scanning tunnelling ...

Dielectrophoresis in microfluidics technology

Cetin, B.; Li, D. (WILEY-VCH Verlag, 2011-08-26)

Dielectrophoresis (DEP) is the movement of a particle in a non-uniform electric field due to the interaction of the particle’s dipole and spatial gradient of the electric field. DEP is a subtle solution to manipulate ...

Three-dimensional mortar-based frictional contact treatment in isogeometric analysis with NURBS

Temizer, I.; Wriggers, P.; Hughes, T. J. R. (Elsevier, 2012-02-01)

A three-dimensional mortar-based frictional contact treatment in isogeometric analysis with NURBS is presented in the finite deformation regime. Within a setting where the NURBS discretization of the contact surface is ...

Piloted Evaluation of a Control Allocation Technique to Recover from Pilot-Induced Oscillations

Acosta, D. M.; Yildiz, Y.; Craun, R. W.; Beard, S. D.; Leonard, M. W.; Hardy, G. H.; Weinstein, M. (AIAA, 2014-10-07)

This paper describes the maturation of a control allocation technique designed to assist pilots in recovery from pilot-induced oscillations. The control allocation technique to recover from pilot-induced oscillations is ...

A mixed formulation of mortar-based contact with friction

Temizer, I. (Elsevier, 2013-03-01)

A classical three-field mixed variational formulation of frictionless contact is extended to the frictional regime. The construction of the variational framework with respect to a curvilinear coordinate system naturally ...

A computational homogenization framework for soft elastohydrodynamic lubrication

Budt, M.; Temizer, I.; Wriggers, P. (Springer, 2012-01-01)

The interaction between microscopically rough surfaces and hydrodynamic thin film lubrication is investigated under the assumption of finite deformations. Within a coupled micro–macro analysis setting, the influence ...

On the asymptotic expansion treatment of two-scale finite thermoelasticity

Temizer, I. (Elsevier, 2012-04)

The asymptotic expansion treatment of the homogenization problem for nonlinear purely mechanical or thermal problems exists, together with the treatment of the coupled problem in the linearized setting. In this contribution, ...

Effect of lateral tip stiffness on atomic-resolution force field spectroscopy

Uluutku, B.; Baykara, M. Z. (American Vacuum Society, 2013-05-20)

Atomic force microscopy is being increasingly used to measure atomic-resolution force fields on sample surfaces, making correct interpretation of resulting data critically important. In addition to asymmetry, elastic ...

Effect of thermal creep on heat transfer for a 2D microchannel flow: An analytical approach

Cetin, B. (ASME, 2013)

In this paper, velocity profile, temperature profile, and the corresponding Poiseuille and Nusselt numbers for a flow in a microtube and in a slit-channel are derived analytically with an isoflux thermal boundary condition. ...

Artifacts related to tip asymmetry in high-resolution atomic force microscopy and scanning tunneling microscopy measurements of graphitic surfaces

Uluutku, B.; Baykara, M. Z. (American Vacuum Society, 2015-03-20)

The effect of tip asymmetry on atomic-resolution scanning tunneling microscopy and atomic force microscopy measurements of graphitic surfaces has been investigated via numerical simulations. Employing a three-dimensional, ...