Fatigue Crack Propagation Monitoring by Acoustic Emission Signal Analysis

2011 ◽  
Vol 465 ◽  
pp. 370-373 ◽  
Author(s):  
Paola Antonaci ◽  
Pietro G. Bocca ◽  
Davide Masera
Keyword(s):  
Acoustic Emission ◽  
Signal Analysis ◽  
Mechanical Response ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Testing Laboratory ◽  
Cyclic Action ◽  
Emission Signal ◽  
Non Destructive

The aim of this work is to analyse the mechanical response of the masonry specimens under long-term action by means of cyclic tests. To this end laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino. The Acoustic Emission technique was employed to assess the damage evolution, and the mechanical properties decay in order to evaluate the extent and the evolution of micro and macro-cracking due to cyclic action until structural collapse in masonry blocks and mortar layers.

A Novel Acoustic Emission Technique to Monitor Damage Evolution in Masonry Structures

2010 ◽  
Vol 163-167 ◽  
pp. 2461-2464
Author(s):  
Paola Antonaci ◽  
Pietro G. Bocca ◽  
Davide Masera
Keyword(s):  
Acoustic Emission ◽  
Damage Evolution ◽  
Mechanical Response ◽  
Acoustic Emission Technique ◽  
Destructive Testing ◽  
Cyclic Action ◽  
Emission Analysis ◽  
Analysis Technique ◽  
Non Destructive

The aim of this work is to analyse the mechanical response of the masonry specimens under long-term action by means of cyclic tests. To this end laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino. The Acoustic Emission technique was employed to assess the damage evolution, and the mechanical properties decay in order to evaluate the extent and the evolution of micro and macro-cracking due to cyclic action until structural collapse in masonry blocks and mortar layers by means of a novel Acoustic Emission analysis technique.

Cyclic vs. Static Loading Behaviour of Masonry Blocks: An Approach to Evaluate the Long-Term Behaviour

2010 ◽  
Vol 452-453 ◽  
pp. 129-132
Author(s):  
Paola Antonaci ◽  
Pietro G. Bocca ◽  
Davide Masera
Keyword(s):  
Fatigue Behaviour ◽  
Non Destructive Testing ◽  
Static Displacement ◽  
Destructive Testing ◽  
Testing Laboratory ◽  
Cyclic Displacement ◽  
Non Destructive ◽  
Compressive Tests

The paper presents the results of an experimental investigation conducted on bricks. Prism-shaped specimens were produced. Laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino. They were subjected to static compressive tests for the determination of their mechanical properties and cyclic compressive tests for the analysis of their fatigue behaviour. The aim of this work is to apply a failure criterion based on the observation of the static and cyclic curves to estimate the fatigue life and the long-term behaviour of the brick. Subsequently, it will be possible to give a relation between the static-displacement and cyclic-displacement of the material tested.

Acoustic Emission Method for Monitoring Corrosion Reactions

CORROSION ◽  
1976 ◽  
Vol 32 (4) ◽  
pp. 121-126 ◽  
Author(s):  
T. W. RETTIG ◽  
M. J. FELSEN
Keyword(s):  
Acoustic Emission ◽  
Non Destructive Testing ◽  
Acoustic Emission Method ◽  
Emission Method ◽  
Destructive Testing ◽  
Corrosion Reaction ◽  
Reaction Processes ◽  
Non Destructive ◽  
Corrosion Research

Abstract There is a continuing need for new test techniques to follow corrosion reaction processes and to predict long-term materials performance in aggressive environments. Additionally, there is a growing awareness of the importance of applying non-destructive inspection to determine the presence of corrosion in non-visible areas of equipment and structures. The possibilities of utilizing acoustic emission for a broad range of applications in the study of these problems were explored. Proprietary methods were developed to follow corrosion reactions and to monitor corrosion of simulated and actual structures. These experiments point out the applicability of acoustic emission as a sensitive new tool for corrosion research and non-destructive testing (NDT) in corrosion prone structures and equipment.

Damage Analysis of RC Beams Strengthened with CFRP Sheets by Acoustic Emission Technique

2010 ◽  
Vol 163-167 ◽  
pp. 2511-2514
Author(s):  
Davide Masera ◽  
Pietro G. Bocca
Keyword(s):  
Acoustic Emission ◽  
Load Test ◽  
Rc Beams ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Cfrp Sheets ◽  
Emission Signal ◽  
Characteristic Signal ◽  
Definition Of ◽  
Non Destructive

The aim of this work is to develop a procedure to follow the evolution of fracture in RC Beams strengthened with CFRP sheets by means of Acoustic Emission signal analysis. In particular the main goal of this experimental work wants to be the definition of a characteristic signal parameter able to represent the evolution of the fracture dimension in the RC Beams during load test. To this end, laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino.

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