Evaluation of fracture toughness of autoclaved lightweight concrete by means of acoustic emission technique

1990 ◽  
Vol 23 (2) ◽  
pp. 113-114
Keyword(s):  
Fracture Toughness ◽  
Acoustic Emission ◽  
Lightweight Concrete ◽  
Acoustic Emission Technique

scholarly journals Studies on indentation fracture toughness on ceramic and ceramic composite using acoustic emission technique

1999 ◽  
Vol 22 (1) ◽  
pp. 25-32 ◽  
Author(s):  
A K Ray ◽  
G Das ◽  
N K Mukhopadhyay ◽  
D K Bhattacharya ◽  
E S Dwarakadasa ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Acoustic Emission ◽  
Ceramic Composite ◽  
Indentation Fracture ◽  
Acoustic Emission Technique ◽  
Indentation Fracture Toughness

scholarly journals Equivalent biaxial strain evaluation in small punch testing using acoustic emission

2020 ◽  
pp. 030932472094406
Author(s):  
Rhys Pullin ◽  
Ifan Jenkins ◽  
Anghel Cernescu ◽  
Allen Edwards
Keyword(s):  
Fracture Toughness ◽  
Acoustic Emission ◽  
Fracture Strain ◽  
Fracture Initiation ◽  
Unstable Fracture ◽  
Displacement Curve ◽  
Small Punch Test ◽  
Acoustic Emission Technique ◽  
Small Punch ◽  
Punch Test

The small punch test initially used mainly in the nuclear sector proved to be an efficient method of estimating the mechanical properties of materials, including fracture toughness. In general, the fracture toughness is estimated based on a correlation with equivalent biaxial fracture strain. However, the latter depends on knowing the onset of the unstable fracture. In this article, the acoustic emission technique is used within the small punch test for estimating the unstable fracture initiation and determining the corresponding punch displacement from the load–displacement curve. Although, the acoustic emission signal can be slightly altered due to the location of the sensor, the results confirm the potential of the acoustic emission technique for detecting the onset of the unstable cracking and thus accurately estimating the equivalent biaxial fracture strain. The accumulated energy during the small punch test is one of the relevant acoustic emission parameters in estimating the fracture onset since it can be associated with the accumulated strain energy released by the deformed material.

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