vibration – TechConnect Briefs

Mechanical reliability of fused deposition modeled polymers and composites

Keles O., Anderson E.H., San Jose State University, US

Fused deposition modeling (FDM) is the most common additive manufacturing technique for the production of cost effective polymers and composites. In fact, half million FDM systems were sold between 2013 and 2015. FDM is used [...]

Point-Mass Model for Nano-Patterning Using Dip-Pen Nanolithography (DPN)

Kang S-W, Banerjee D., Texas A&M University, US

Micro-cantilevers are frequently used as probes for micro-electromechanical systems (MEMS) based sensing applications. Usually micro-cantilever based sensors work by detecting changes in cantilever vibration modes (e.g., bending or torsional vibration frequency) or surface stresses - [...]

Non traditional dicing of MEMS devices

Sullivan S., Yoshikawa T., DISCO Corp., JP

Dicing of MEMS contains a host of challenges. Contamination, vibration, thermal, and electrical sensitivity dictate modified or non traditional dicing processes. Focusing a laser beam inside of the silicon substrate creating a modified layer is [...]

In-plane Vibration Measurements of Micro Scale Devices Using Sub-Pixel Image Registration Algorithms and Stroboscopic Illumination

Buyukyazi T., Basdogan I., Koc university, TR

Rapid developments in micro devices created a necessity for reliable testing methods for characterization. There are several methods for vibration measurements but most of them use out-of-plane displacements. However, in most cases in-plane measurements are [...]

Determination of Frequency Dependent Fluid Damping of Micro and Nano Resonators for Different Cross-sections

Zhang W., Requa M., Turner K., University of California at Santa Barbara, US

This research is to quantitatively investigate the fluid damping of the MEMS and NEMS flexural resonators such as AFM and carbon nanotube resonators. We systematically explore the three most important factors which affect the fluid [...]

High Damping Electrostatic System For Vibration Energy Scavenging

Despesse G., Chaillout J.J., Dekkaki I., Jager T., Léger J.M., Vassilev A., Basrour S., Charlot B., CEA-LETI, FR

We report here global simulations and designs of mechanical structures able to recover power over a large spectrum below 100 Hz. Contrary to existing structures tuned on a particular frequency, we have investigated conversion structures [...]

Vibrating Nanotube–based Nano Powder Production System

Akhatov I.S., Jang B.Z., Rastgaar Aagaah M., Schmidt D.R., Mitlyng A.S., Stewart M.B., Mahinfalah M., North Dakota State University, US

In this paper we present a new nano powder production method. Basic idea of this method is as follows: a nanotube being placed in a vapor atmosphere will provoke condensation of vapor on the tip [...]

Mechanical Damping due to Interface Motion in Micro-Resonators

Pawaskar D.N., Phillips R., California Institute of Technology, US

Mechanical damping strongly influences the sensitivity and resolution of nano-sensors and actuators. In this paper, we have investigated one of the key intrinsic mechanisms responsible for dissipation of vibrational energy in beams composed of a [...]

Effects of Slider-Driven Piezo-Microactuator Placements and Profiles on HGA Sway Mode

Yang J.P., Chen S.X., National University of Singapore, US

With areal recording density of hard disk drives (HDD) historically growing at an average of 60% per year, it is becoming increasingly more difficult to maintain the precise positioning required of the ever-smaller GMR heads [...]