Department of Mechanical Engineering
Recent Submissions
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Design and fabrication of a microfluidic device for synthesis of chitosan nanoparticles
(ASME, 2013-08)Chitosan nanoparticles have a biodegradable, biocompatible, nontoxic structure, and are commonly used for drug delivery systems. In this study, design, modeling, and fabrication methodology of a microfluidic device for the ... -
Probing three-dimensional surfaces force fields with atomic resolution: Measurement strategies, limitations, and artifact reduction
(Beilstein-Institut., 2012-09-11)Noncontact atomic force microscopy (NC-AFM) is being increasingly used to measure the interaction force between an atomically sharp probe tip and surfaces of interest, as a function of the three spatial dimensions, with ... -
Understanding Scanning Tunneling Microscopy Contrast Mechanisms on Metal Oxides: A Case Study
(American Chemical Society, 2013-11-01)A comprehensive analysis of contrast formation mechanisms in scanning tunneling microscopy (STM) experiments on a metal oxide surface is presented with the oxygen-induced (2√2 √2)R45 missing row reconstruction of the ... -
Tactile perception by friction induced vibrations
(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
(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 ... -
On the asymptotic expansion treatment of two-scale finite thermoelasticity
(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, ... -
Measurement of sound, vibration and friction between soft materials under light loads
(Elsevier, 2012-02-15)Tactile perception of materials and surface texture involves friction under light normal loads and is fundamental to further advancing areas such as tactile sensing, haptic systems used in robotic gripping of sensitive ... -
Tribological interaction between polytetrafluoroethylene and silicon oxide surfaces
(AIP, 2014-10-23)We investigated the tribological interaction between polytetrafluoroethylene (PTFE) and silicon oxide surfaces. A simple rig was designed to bring about a friction between the surfaces via sliding a piece of PTFE on a ... -
Nonuniform friction-area dependency for antimony oxide surfaces sliding on graphite
(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 ... -
Swappable Distributed MIMO Controller for a VCT Engine
(IEEE, 2011-08-18)In the early days of computer control, only one centralized computer was responsible for executing the algorithms. Increasingly, computer control algorithms reside inside individual system components in a distributed ... -
Noncontact atomic force microscopy II
(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 ... -
A large deformation frictional contract formulation using NURBS-based isogeometric analysis
(John Wiley & Sons, 2011-02-23)This paper focuses on the application of NURBS-based isogeometric analysis to Coulomb frictional contact problems between deformable bodies, in the context of large deformations. A mortar-based approach is presented to ... -
Microchannel heat transfer with slip flow and wall effects
(American Institute of Aeronautics and Astronautics, 2014-04-10)Analysis is presented for conjugate heat transfer in a parallel-plate microchannel. Axial conduction in the fluid and in the adjacent wall is included. The fluid is a constant property gas with a slip-flow velocity ... -
Effect of thermal creep on heat transfer for a 2D microchannel flow: An analytical approach
(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. ... -
Exploring atomic-scale lateral forces in the attractive regime: a case study on graphite (0001)
(IOP Publishing, 2012-09-20)A non-contact atomic force microscopy-based method has been used to map the static lateral forces exerted on an atomically sharp Pt/Ir probe tip by a graphite surface. With measurements carried out at low temperatures and ... -
A mixed formulation of mortar-based frictionless contact
(Elsevier, 2012-06-01)A class of mortar-based frictionless contact formulations is derived based on a classical three-field mixed variational framework. Within a penalty regularization complemented by Uzawa augmentations, discrete mortar ... -
Frequency intermittency and energy pumping by linear attachments
(Elsevier, 2014-09-01)The present paper considers the problem of realizing an effective targeted energy pumping from a linear oscillator to a set of ungrounded linear resonators attached to it. Theoretical as well as numerical results demonstrate ... -
Granular contact interfaces with non-circular particles
(Elsevier, 2013-11)The influence of particle geometry on the macroscopic frictional response of granular interfaces is investigated via computational contact homogenization. The particle shape is parametrized by convex superellipse geometries ... -
Simultaneous measurement of multiple independent atomic-scale Interactions using scanning probe microscopy: data interpretation and the effect of cross-talk
(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 ... -
Numerical modeling of acoustophoretic particle separation for microfluidics
(Springer, 2014-04-22)A numerical simulation methodology for ultrasonic particle/cell separation and cell washing processes is introduced and validated by comparing with the results from the literature. In this study, a finite element approach ...
