scholarly journals High speed vision system for the dynamic characterization of 3D printed sensors

2019 ◽  
Vol 1249 ◽  
pp. 012001
Author(s):  
Alessandro Bonanomi ◽  
Emanuele Zappa ◽  
Alfredo Cigada ◽  
Valentina Zega ◽  
Alberto Corigliano
Author(s):  
Mattia Alessandro Ragolia ◽  
Attilio di Nisio ◽  
Anna Maria Lanzolla ◽  
Gianluca Percoco ◽  
Marco Scarpetta ◽  
...  

2013 ◽  
Vol 535-536 ◽  
pp. 48-51 ◽  
Author(s):  
Rafael Celeghini Santiago ◽  
Marcilio Alves

The mechanical strength of a fiber-metal laminate is not so well explored at high strain rates, although its constituents are prone to exhibit such effects. In this paper, we describe an investigation of aluminium-fiber glass material using the Split Hopkinson bar device. We report on various experimental issues related to these tests, giving some emphasis to the use of high speed filming to obtain information on the specimen strain and strain rate.


Author(s):  
Panneer Selvam R. ◽  
Muthukannan Duraiselvam ◽  
Sanjay G. Barad ◽  
Dilip Kumar

Abstract Experimental Modal Analysis (EMA) is a conventional technique for establishing the modal parameters of the components. The modal parameters are the dynamic characteristics viz. frequency, mode shapes and damping that are used for assessing and validating the design predictions through correlation studies. For this task EMA technique is adopted to assess the dynamic characteristics of an additive manufactured (AM) turbine wheel of a turbocharger. Correlation studies are undertaken to validate the theoretical model developed. These Correlation studies ensured that there is no major deviations to proceed for high speed spin testing of this turbine wheel in simulated environment. The possible interference or resonances in the operating range are identified for safe operation of the test rotor.


Author(s):  
Jiamin Zhang ◽  
Peng Shan ◽  
Kai Cheng ◽  
Dechao Ye

The tip-timing technology has been widely developed and has become an industry standard in aircraft engine and gas turbine over past decade. The main application of the tip-timing method is to verify safe operation of blades and monitor the health of blades. But tip-timing technology gets rarely used to the last stage blade of steam turbine. Particularly the blade is designed with an integral shroud, snubber and fir-tree root. The article mainly describes the process of identifying the dynamic characterization of last stage blade with an integral shroud and snubber by contactless measurements provided by tip-timing technology. Attention is focused on the comparison of tip-timing results with the results from strain gauge data. Firstly, the frequency response of the bladed blisk is calculated by using Computer-Aided-Engineering (CAE) technologies. Secondly, according to the results of finite element modal calculation, the location of strain gauge is confirmed. The dynamic strain of blade is measured by utilizing telemetry technology. Finally, according to the design features of integral shroud, the tip-timing probe locations must be accurately confirmed in order to acquire the valid data. All probes are positioned along the radial direction of blades. The rotating vibration test of the bladed blisk has been carried out in the high-speed test rig. In order to validate the tip-timing measurement, all the results from the tip-timing, especially the resonant frequencies and damping ratios, are compared with results from the strain gauges with which only a few blades were equipped.


2021 ◽  
Vol 118 (21) ◽  
pp. 211901
Author(s):  
Mohammad Naghavi Zadeh ◽  
Farbod Alijani ◽  
Xianfeng Chen ◽  
Iman Dayyani ◽  
Mehdi Yasaee ◽  
...  

2017 ◽  
Vol 9 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Bandar Alshehri ◽  
Karim Dogheche ◽  
Sofiane Belahsene ◽  
Abderrahim Ramdane ◽  
Gilles Patriarche ◽  
...  

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