An experimental study on loading rate effect on acoustic emission based b-values related to reinforced concrete fracture

2014 ◽  
Vol 70 ◽  
pp. 460-472 ◽  
Author(s):  
R. Vidya Sagar ◽  
M.V.M.S. Rao
Keyword(s):  
Experimental Study ◽  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Loading Rate ◽  
Rate Effect ◽  
Concrete Fracture ◽  
B Values

Investigation of the Staging of Damage Accumulation in Polymer Composite Materials during Bending and Tensile Tests

2021 ◽  
Vol 887 ◽  
pp. 116-122
Author(s):  
A.A. Bryansky ◽  
O.V. Bashkov ◽  
Daria P. Malysheva ◽  
Denis B. Solovev
Keyword(s):  
Acoustic Emission ◽  
Composite Materials ◽  
Polymer Composite ◽  
Loading Rate ◽  
Tensile Tests ◽  
Mechanical Tests ◽  
Rate Effect ◽  
Polymer Composite Materials ◽  
Static Tension ◽  
Point Bend

The paper presents the results of the study of registered acoustic emission (AE) parameters during static deformation and damaging of polymer composite materials (PCM). Mechanical tests were done by a static tension and a static three-point bend, accompanied by an acoustic emission method. The assessment of the loading rate effect on defects formation processes was done by additional static tension test at rate equal half of recommended by the standard and static three-point bend test at rate ten times lower than that calculated by the standard. Clustering by frequency components of the recorded AE signals with a self-organizing Kohonen map was performed. The characteristics of the types of PCM structure damage by the centroids of the obtained clusters are given. Based on the clusters accumulation during mechanical tests, the stages of damage formation for static tension and static three-point bend, the loading rate effect on the process of damage formation are described.

Acoustic Emission Parameters Dependence on the Destruction Process Characteristics into Concrete

2006 ◽  
Vol 13-14 ◽  
pp. 201-204
Author(s):  
Sergey V. Elizarov ◽  
A.L. Alyakritsky ◽  
A.I. Sagaidak
Keyword(s):  
Experimental Study ◽  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Real Time ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Destruction Process ◽  
Spectral Parameters ◽  
Process Characteristics ◽  
New Generation

Acoustic emission (AE) techniques are extensively applied to a variety of fields including civil engineering. Now a new generation of AE techniques, which are able to register and process AE data in real-time, has appeared. Still, there exist some problems to correctly interpreting these data and to completely understand the meaning of AE parameters. In order to solve this, several AE waveform and spectral parameters are investigated, based on an experimental study of concrete and reinforced concrete structures.

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