Predicting Creep Failure from Cracks in a Heterogeneous Material using Acoustic Emission and Speckle Imaging

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Predicting Creep Failure from Cracks in a Heterogeneous Material using Acoustic Emission and Speckle Imaging. / Viitanen, Leevi; Ovaska, Markus; Ram, Sumit Kumar; Alava, Mikko J.; Karppinen, Pasi.

julkaisussa: Physical Review Applied, Vuosikerta 11, Nro 2, 024014, 06.02.2019, s. 1-9.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Viitanen, Leevi ; Ovaska, Markus ; Ram, Sumit Kumar ; Alava, Mikko J. ; Karppinen, Pasi. / Predicting Creep Failure from Cracks in a Heterogeneous Material using Acoustic Emission and Speckle Imaging. Julkaisussa: Physical Review Applied. 2019 ; Vuosikerta 11, Nro 2. Sivut 1-9.

Bibtex - Lataa

@article{147f4019e1af4191b43097da851a259b,
title = "Predicting Creep Failure from Cracks in a Heterogeneous Material using Acoustic Emission and Speckle Imaging",
abstract = "Finding out when cracks become unstable is at the heart of fracture mechanics. Cracks often grow by avalanches and when a sample fails depends on its past avalanche history. We study the prediction of sample failure in creep fracture under a constant applied stress and induced by initial flaws. Individual samples exhibit fluctuations around a typical rheological response or creep curve. Predictions using the acoustic emission from the intermittent crack growth are not feasible until well beyond the sample-dependent minimum strain rate. Using an optical speckle analysis technique, we show that predictability is possible later because of the growth of the fracture process zone.",
author = "Leevi Viitanen and Markus Ovaska and Ram, {Sumit Kumar} and Alava, {Mikko J.} and Pasi Karppinen",
year = "2019",
month = "2",
day = "6",
doi = "10.1103/PhysRevApplied.11.024014",
language = "English",
volume = "11",
pages = "1--9",
journal = "Physical Review Applied",
issn = "2331-7019",
publisher = "American Physical Society",
number = "2",

}

RIS - Lataa

TY - JOUR

T1 - Predicting Creep Failure from Cracks in a Heterogeneous Material using Acoustic Emission and Speckle Imaging

AU - Viitanen, Leevi

AU - Ovaska, Markus

AU - Ram, Sumit Kumar

AU - Alava, Mikko J.

AU - Karppinen, Pasi

PY - 2019/2/6

Y1 - 2019/2/6

N2 - Finding out when cracks become unstable is at the heart of fracture mechanics. Cracks often grow by avalanches and when a sample fails depends on its past avalanche history. We study the prediction of sample failure in creep fracture under a constant applied stress and induced by initial flaws. Individual samples exhibit fluctuations around a typical rheological response or creep curve. Predictions using the acoustic emission from the intermittent crack growth are not feasible until well beyond the sample-dependent minimum strain rate. Using an optical speckle analysis technique, we show that predictability is possible later because of the growth of the fracture process zone.

AB - Finding out when cracks become unstable is at the heart of fracture mechanics. Cracks often grow by avalanches and when a sample fails depends on its past avalanche history. We study the prediction of sample failure in creep fracture under a constant applied stress and induced by initial flaws. Individual samples exhibit fluctuations around a typical rheological response or creep curve. Predictions using the acoustic emission from the intermittent crack growth are not feasible until well beyond the sample-dependent minimum strain rate. Using an optical speckle analysis technique, we show that predictability is possible later because of the growth of the fracture process zone.

UR - http://www.scopus.com/inward/record.url?scp=85061263020&partnerID=8YFLogxK

U2 - 10.1103/PhysRevApplied.11.024014

DO - 10.1103/PhysRevApplied.11.024014

M3 - Article

VL - 11

SP - 1

EP - 9

JO - Physical Review Applied

JF - Physical Review Applied

SN - 2331-7019

IS - 2

M1 - 024014

ER -

ID: 32155026