A Simple and Low-Cost Measurement System for the Complex Permittivity Characterization of Materials

2004 ◽  
Vol 53 (4) ◽  
pp. 1071-1077 ◽  
Author(s):  
E. Fratticcioli ◽  
M. Dionigi ◽  
R. Sorrentino
Keyword(s):  
Measurement System ◽  
Complex Permittivity ◽  
Low Cost ◽  
Cost Measurement ◽  
Characterization Of Materials

Mechanical characterization of materials for bulk forming using a drop weight testing machine

2010 ◽  
Vol 224 (9) ◽  
pp. 1795-1804 ◽  
Author(s):  
C M A Silva ◽  
P A R Rosa ◽  
P A F Martins
Keyword(s):  
Flow Stress ◽  
Mechanical Characterization ◽  
Low Cost ◽  
Testing Machine ◽  
Operating Conditions ◽  
Proportional Loading ◽  
Bulk Forming ◽  
Drop Weight ◽  
Characterization Of Materials

The main limitation of mechanical testing equipments is nowadays centred in the characterization of materials at medium loading rates. This is particularly important in bulk forming because strain rate can easily reach values within the aforesaid range. The aim of this article is twofold: (a) to present the development of a low-cost, flexible drop weight testing equipment that can easily and effectively replicate the kinematic behaviour of presses and hammers and (b) to provide a new level of understanding about the mechanical characterization of materials for bulk forming at medium rates of loading. Special emphasis is placed on the adequacy of test operating conditions to the functional characteristics of the presses and hammers where bulk forming takes place and to its influence on the flow stress. This is needed because non-proportional loading paths during bulk forming are found to have significant influence on material response in terms of flow stress. The quality of the flow curves that were experimentally determined is evaluated through its implementation in a finite-element computer program and assessment is performed by means of axisymmetric upset compression with friction. Results show that mechanical characterization of materials under test operating conditions that are similar to real bulk forming conditions is capable of meeting the increasing demand of accurate and reliable flow stress data for the benefit of those who apply numerical modelling of process design in daily practice.

Low cost measurement system for broadcast power amplifiers

2013 ◽  
Vol 27 (12) ◽  
pp. 4346-4354 ◽  
Author(s):  
Daniel Discini Silveira ◽  
José de Souza Lima ◽  
Maurício Silveira
Keyword(s):  
Measurement System ◽  
Power Amplifiers ◽  
Low Cost ◽  
Cost Measurement

Development of a low-cost measurement system for cutting edge profile detection

2011 ◽  
Vol 9 (7) ◽  
pp. 071201-71204 ◽  
Author(s):  
Gregor Gerstorfer Gregor Gerstorfer ◽  
Bernhard G. Zagar Bernhard G. Zagar
Keyword(s):  
Measurement System ◽  
Low Cost ◽  
Cutting Edge ◽  
Edge Profile ◽  
Cost Measurement

Construction of a Low Cost Photoacoustic Spectrometer for Characterization of Materials

2005 ◽  
Vol 222 (1) ◽  
pp. 287-296 ◽  
Author(s):  
M.A. Jothi Rajan ◽  
Arockiam Thaddeus ◽  
T. Mathavan ◽  
T.S. Vivekanandam ◽  
S. Umapathy
Keyword(s):  
Low Cost ◽  
Photoacoustic Spectrometer ◽  
Characterization Of Materials
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