Test instruments from a new source.Bose Corp.'s Electroforce Systems Div., Eden Prairie Eden Prairie A city of eastern Minnesota, a residential suburb of Minneapolis. Population: 57,300. , Minn., recently developed a line of mechanical test instruments based on the same frictionless linear motor used in Bose's audio speakers. The linear motor has a I moving permanent magnet and two static coils that produce oscillations oscillations See Cortical oscillations. that can be tuned to perform a wide range of tests, including tensile, fatigue, creep, viscoelasticity Viscoelasticity, also known as anelasticity, is the study of materials that exhibit both viscous and elastic characteristics when undergoing deformation. Viscous materials, like honey, resist shear flow and strain linearly with time when a stress is applied. , stress relaxation, and crack growth. Electroforce instruments typically come with force levels of 22 to 7000 N. A new model with 15,000 N has a frequency range of up to 100 Hz and 2 in. of travel. Bose says electromagnetic drive is more reliable and efficient than hydraulic power. The motors don't require water cooling and simply plug into a wall socket. Tel: (952) 278-3070 * www.bose-electroforce.com Meanwhile, another test instrument supplier that may be unfamiliar to U.S. plastics processors is 01dB Inc., Novi, Mich. (sub. of 01db-Metravib in France), a maker of oscillating os·cil·late intr.v. os·cil·lat·ed, os·cil·lat·ing, os·cil·lates 1. To swing back and forth with a steady, uninterrupted rhythm. 2. material test instruments. It offers test instruments with force levels of 50 to 450 N, including advanced DMA (1) (Digital Media Adapter) See digital media hub. (2) (Document Management Alliance) A specification that provides a common interface for accessing and searching document databases. , TMA TMA Turnaround Management Association TMA Texas Medical Association TMA Transportation Management Association TMA Training and Management Assistance (a component of OHRD, which is a component of OWR) TMA Tooling & Manufacturing Association , creep, stress-relaxation, and fatigue test capabilities. The newest model is a compact desktop DMA (dynamic mechanical analysis) tester. The DMA 50 (50 N capacity) has the unusual capability to perform tests on samples submerged in liquids such as water or oil to test environmental effects on mechanical performance. Tel: (248) 592-2990. www.dma-instrurnents.com [ILLUSTRATION OMITTED] |
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