Determination of viscoelastic material parameters by step-loading nanoindentation

2008 ◽  
Vol 41 (7) ◽  
pp. 074024 ◽  
Author(s):  
S N Dub ◽  
M L Trunov
Keyword(s):  
Viscoelastic Material ◽  
Material Parameters ◽  
Step Loading

scholarly journals Lamb wave based approach to the determination of elastic and viscoelastic material parameters

2021 ◽  
Vol 88 (s1) ◽  
pp. s28-s33
Author(s):  
Sarah Johannesmann ◽  
Leander Claes ◽  
Bernd Henning
Keyword(s):  
Viscoelastic Material ◽  
Lamb Waves ◽  
Measurement Data ◽  
Material Model ◽  
Measurement Procedure ◽  
Ultrasonic Waves ◽  
Thermoelastic Effect ◽  
Material Parameters ◽  
Yield Information

Abstract In this paper a measurement procedure is presented to identify both elastic and viscoelastic material parameters of plate-like samples using broadband ultrasonic waves. These Lamb waves are excited via the thermoelastic effect using laser radiation and detected by a piezoelectric transducer. The resulting measurement data is transformed to yield information about multiple propagating Lamb waves as well as their attenuation. These results are compared to simulation results in an inverse procedure to identify the parameters of an elastic and a viscoelastic material model.

Bend Testing of Parts Made by Rapid Prototyping with Respect to Possible Use in Robotics

2015 ◽  
Vol 760 ◽  
pp. 141-146 ◽  
Author(s):  
Jan Lipina ◽  
Václav Krys ◽  
Jiří Marek
Keyword(s):  
3D Printing ◽  
Rapid Prototyping ◽  
Experimental Determination ◽  
Internal Structure ◽  
Detailed Knowledge ◽  
3D Printer ◽  
Bend Strength ◽  
Bend Testing ◽  
Material Parameters

Recently, the Rapid Prototyping technology (RP hereafter) has been increasingly used for a final product, which requires detailed knowledge of designing parts made by the RP technology. In order to apply parts made by the RP technology in robotics, and design in general, in a wider range, one of the most important material parameters is their bend strength. The paper describes an experimental determination of bend strength in parts printed on a 3D printer. The parts were made of polycarbonate. The tests were carried out in parts with various types of internal structure. The achieved results can be implemented when designing parts made by 3D printing provided that professional printers are used.

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