Damage Characterization of Glass/Epoxy Composite Under Three-Point Bending Test Using Acoustic Emission Technique

Abstract This paper summarizes a master’s thesis project which explored whether the characteristics of Acoustic Emission Testing (AET) signals can be used to detect yielding in steel samples undergoing a three-point bending test. A subset of existing data from a three-point bending test was exported and used as input. Data was processed by utilizing and developing tools to visualize and analyse the signal characteristics, primarily through a parameter-based approach. Signals were visualized, and parameters were optimized to identify and classify signal types. According to the obtained results, some limitations on classification were experienced due to the length of the hit data recorded. Though the work reported in this article lead to a reliable method for detecting yielding, the developed algorithms were not successful in identifying characteristics that could be used to detect yielding.

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Effect of Concrete Mixture Composition on Acoustic Emission and Fracture Parameters Obtained from Three-Point Bending Test

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1100.152 ◽

2015 ◽

Vol 1100 ◽

pp. 152-155

Author(s):

Libor Topolář ◽

Hana Šimonová ◽

Petr Misák

Keyword(s):

Acoustic Emission ◽

Bending Test ◽

Mixture Composition ◽

Three Point Bending ◽

Concrete Mixtures ◽

Fracture Parameters ◽

Fracture Tests ◽

Stress Behaviour ◽

Bending Fracture ◽

Fracture Processes

This paper reports the analysis of acoustic emission signals captured during three-point bending fracture tests of concrete specimens with different mixture composition. Acoustic emission is an experimental tool well suited for monitoring fracture processes in material. The typical acoustic emission patterns were identified in the acoustic emission records for three different concrete mixtures to further describe the under-the-stress behaviour and failure development. An understanding of microstructure–performance relationships is the key to true understanding of material behaviour. The acoustic emission results are accompanied by fracture parameters determined via evaluation of load versus deflection diagrams recorded during three-point bending fracture tests.

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Three-Point Bending Test Evaluation of Concrete Specimens by Non-Traditional Analysis of Acoustic Emission Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.837.198 ◽

2016 ◽

Vol 837 ◽

pp. 198-202

Author(s):

Luboš Pazdera ◽

Libor Topolář ◽

Tomáš Vymazal ◽

Petr Daněk ◽

Jaroslav Smutny

Keyword(s):

Acoustic Emission ◽

Signal Analysis ◽

Measurement Data ◽

Bending Test ◽

Test Evaluation ◽

Acoustic Emission Method ◽

Emission Method ◽

Three Point Bending ◽

Time Frequency ◽

Emission Signal

The aim of the paper is focused on the analysis of the mechanical properties of the concrete specimens with plasticizer at three point bending test by the signal analysis of the acoustic emission signal. The evaluations were compared the measurement and the results obtained with theoretical presumptions. The Joint Time Frequency Analysis applied on measurement data and its evaluation is described. It is well known that the Acoustic Emission Method is a very sensitive method to determine active cracks into structure. However, evaluation of acoustic emission signals is very difficult. A non-traditional method was used to signal analysis of burst acoustic emission signals recorded during three point bending test.

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Mechanical Property and Oxidation Behavior of LPS-SiC Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.321-323.913 ◽

2006 ◽

Vol 321-323 ◽

pp. 913-916

Author(s):

Sang Ll Lee ◽

Yun Seok Shin ◽

Jin Kyung Lee ◽

Jong Baek Lee ◽

Jun Young Park

Keyword(s):

Mechanical Property ◽

Fracture Toughness ◽

Oxidation Behavior ◽

Elevated Temperatures ◽

Indentation Test ◽

Bending Test ◽

Secondary Phases ◽

Three Point Bending ◽

Different Temperatures

The microstructure and the mechanical property of liquid phase sintered (LPS) SiC materials with oxide secondary phases have been investigated. The strength variation of LPS-SiC materials exposed at the elevated temperatures has been also examined. LPS-SiC materials were sintered at the different temperatures using two types of Al2O3/Y2O3 compositional ratio. The characterization of LPS-SiC materials was investigated by means of SEM with EDS, three point bending test and indentation test. The LPS-SiC material with a density of about 3.2 Mg/m3 represented a flexural strength of about 800 MPa and a fracture toughness of about 9.0 MPa⋅√m.

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Characterization of mortar fracture based on three point bending test and XFEM

International Journal of Pavement Research and Technology ◽

10.1016/j.ijprt.2017.09.005 ◽

2018 ◽

Vol 11 (4) ◽

pp. 339-344 ◽

Cited By ~ 7

Author(s):

Yucheng Huang ◽

Yanhua Guan ◽

Linbing Wang ◽

Jian Zhou ◽

Zhi Ge ◽

...

Keyword(s):

Bending Test ◽

Three Point Bending

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Correlation between Process Parameters with Flexural Properties of Hybrid Glass/Jute Fibre Reinforced Epoxy Composite Fabricated via Vacuum Infusion Technique

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.761.531 ◽

2015 ◽

Vol 761 ◽

pp. 531-535

Author(s):

Noraiham Mohamad ◽

Mohd Fadli Hassan ◽

Siang Yee Chang ◽

Qumrul Ahsan ◽

Yuhazri Yaakob ◽

...

Keyword(s):

Epoxy Composite ◽

Processing Parameters ◽

Bending Test ◽

Flexural Properties ◽

Jute Fibre ◽

Soaking Time ◽

Three Point Bending ◽

Vacuum Infusion ◽

Supply Pressure ◽

Infusion Technique

Flexural properties of hybrid glass/jute fibre reinforced epoxy composites were optimised by response surface methodology. The processing parameters of vacuum infusion technique such as supply pressure, soaking time and use of flow media were investigated. The flexural properties of the resulting composites were evaluated using three-point bending test in accordance with the ASTM D790-03 standard. The flexural strength of ~195 MPa and elastic modulus of ~13412 MPa were achieved at optimum parameter of 100 kPa pressure, 120 minutes soaking time with the utilization of flow media during vacuum infusion process.

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