On the Feasibility of Catastrophic Cutting Tool Fracture Prediction Via Acoustic Emission Analysis

1993 ◽  
Vol 115 (4) ◽  
pp. 390-397 ◽  
Author(s):  
J. A. Rice ◽  
S. M. Wu
Keyword(s):  
Acoustic Emission ◽  
Energy Release Rate ◽  
Energy Release ◽  
Physical Model ◽  
Release Rate ◽  
Cutting Tool ◽  
Emission Analysis ◽  
Ae Signal ◽  
Ae Signals ◽  
Acoustic Emission Analysis

The prediction of catastrophic cutting tool fracture is explored through monitoring the acoustic emission (AE) from a cutting process. A prediction parameter is derived which combines the AE signal with a physical model of a cracked tool to form an estimate of the spatial energy release rate. Monitoring the energy release rate is found to be largely dependent on the detection of crack advancement. Experiments were performed with both new and artificially cracked inserts during interrupted cutting. Epoches denoting crack advancement were detected through high time homomorphic analysis of the acquired AE signals. AE bursts prior to and leading up to fracture were analyzed for crack advancement. The calculated energy release rate was found to exponentially increase as fracture was approached. Crack advancement could be feasibly detected approximately six cuts prior to fracture.

Predicting the Delamination Mechanisms of Multidirectional Laminates Using the Energy Release Rate Obtained from AE Monitoring

2022 ◽  
Vol 80 (1) ◽  
pp. 34-47
Author(s):  
Yinghonglin Liu ◽  
Jiang Peng ◽  
Wei Li ◽  
Chang Yang ◽  
Ping Sun ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Energy Release Rate ◽  
Energy Release ◽  
Real Time ◽  
Release Rate ◽  
Strain Energy ◽  
Strain Energy Release Rate ◽  
Strain Energy Release ◽  
Emission Parameter ◽  
Delamination Damage

This study investigates delamination damage mechanisms during the double cantilever beam standard test using the strain energy release rate. The acoustic emission parameter is used to replace the original calculation method of measuring crack length to predict delamination. For this purpose, 24-layer glass/epoxy multidirectional specimens with different layups, and interface orientations of 0°, 30°, 45°, and 60°, were fabricated based on ASTM D5528 (2013). Acoustic emission testing (AE) is used to detect the damage mechanism of composite multidirectional laminates (combined with microscopic real-time observation), and it is verified that the strain energy release rate can be used as a criterion for predicting delamination damage in composite materials. By comparing the AE results with the delamination expansion images observed by microvisualization in real time, it is found that the acoustic emission parameters can predict the damage of laminates earlier. Based on the data inversion of the acoustic emission parameters of the strain energy release rate, it is found that the strain energy release rate of the specimens with different fiber interface orientations is consistent with the original calculated results.

Akustische Emissionsmessung an Papier/Acoustic emission analysis on paper – Identification of failure mechanisms in the forming of sustainable fibre materials

2020 ◽  
Vol 110 (10) ◽  
pp. 650-655
Author(s):  
Julian Mushövel ◽  
Torben Völker ◽  
Peter Groche
Keyword(s):  
Acoustic Emission ◽  
Tensile Test ◽  
Failure Mechanisms ◽  
Tensile Tests ◽  
Test Rig ◽  
Emission Analysis ◽  
Ae Signals ◽  
Acoustic Emission Analysis

Die Faserbewegungen und mikromechanischen Mechanismen während der Umformung von Papier sind bis heute nicht gänzlich geklärt. In dieser Arbeit werden die Einsatzmöglichkeiten der akustischen Emissionsmessung (AE-Messung) zur Analyse des Faserverhaltens untersucht. Zu diesem Zweck werden Zugversuche mit Papierproben an einem Miniaturzugprüfstand durchgeführt. Zusammenhänge zwischen mikromechanischen Prozessen im Papier und den Peak-Frequenzen der detektierten AE-Signale werden aufgedeckt.   The fibre movements and micromechanical mechanisms during the forming of paper are still not fully understood. This paper investigates the application of acoustic emission analysis (AE analysis) for the characterization of fibre behaviour. For this purpose, tensile tests with paper samples are performed on a miniature tensile test rig. Correlations between micromechanical processes in the paper and the peak-frequencies of the detected AE signals are found.

In-Situ Observation and Acoustic Emission Analysis for Corrosion Pitting of MgCl2 Droplet in SUS304 Stainless Steel

2012 ◽  
Vol 53 (6) ◽  
pp. 1069-1074 ◽  
Author(s):  
Mitsuharu Shiwa ◽  
Hiroyuki Masuda ◽  
Hisashi Yamawaki ◽  
Kaita Ito ◽  
Manabu Enoki
Keyword(s):  
Stainless Steel ◽  
Acoustic Emission ◽  
Emission Analysis ◽  
Sus304 Stainless Steel ◽  
Corrosion Pitting ◽  
Acoustic Emission Analysis

Calculating Energy Release Rate as a Function of Crack Length Using a Multiple-Step Crack Closure Technique in Tire Finite Element Models

2018 ◽  
Vol 46 (3) ◽  
pp. 130-152
Author(s):  
Dennis S. Kelliher
Keyword(s):  
Finite Element ◽  
Energy Release Rate ◽  
Crack Length ◽  
Energy Release ◽  
Crack Closure ◽  
Release Rate ◽  
Fatigue Behavior ◽  
Three Dimensions ◽  
Quantitative Prediction ◽  
Closure Technique

ABSTRACT When performing predictive durability analyses on tires using finite element methods, it is generally recognized that energy release rate (ERR) is the best measure by which to characterize the fatigue behavior of rubber. By addressing actual cracks in a simulation geometry, ERR provides a more appropriate durability criterion than the strain energy density (SED) of geometries without cracks. If determined as a function of crack length and loading history, and augmented with material crack growth properties, ERR allows for a quantitative prediction of fatigue life. Complications arise, however, from extra steps required to implement the calculation of ERR within the analysis process. This article presents an overview and some details of a method to perform such analyses. The method involves a preprocessing step that automates the creation of a ribbon crack within an axisymmetric-geometry finite element model at a predetermined location. After inflating and expanding to three dimensions to fully load the tire against a surface, full ribbon sections of the crack are then incrementally closed through multiple solution steps, finally achieving complete closure. A postprocessing step is developed to determine ERR as a function of crack length from this enforced crack closure technique. This includes an innovative approach to calculating ERR as the crack length approaches zero.

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