Fracture toughness testing in the ductile-brittle transition region

Kim Wallin

doi:10.1016/B978-0-08-034341-9.50038-3

Fracture toughness testing in the ductile-brittle transition region

Kim Wallin

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

Fracture toughness testing in the ductile-brittle transition regime is often problematic. In this region both constraint effects as well as ductile tearing will affect the brittle fracture probability. This causes the scatter to grow very large in the transition region. Up till now there has not existed any kind of reliable means of how to validate such data. In this paper a new method for validation is presented.

Based on a theoretical cleavage fracture model, it is possible to evaluate the effect of ductile tearing on the cleavage fracture probability. When combining this model with the knowledge from finite element calculations of the plastic zone, it is not only possible to evaluate a minimum specimen size to obtain valid brittle fracture toughness results, but it is also possible to change the invalid results into valid results. It is also possible to describe the fracture probability of large specimens and structures from the results obtained with “invalid size” specimens.

Original language	English
Title of host publication	Proceedings of the 7th International Conference on Fracture (ICF7)
Subtitle of host publication	Brittle Fracture, Ductile Fracture, Dynamic Fracture
Editors	K. Salama, K. Ravi-Chandar, D.M.R. Taplin, P. Rama Rao
Publisher	Pergamon Press
Pages	267-276
Volume	1
ISBN (Print)	978-0-08-034341-9
DOIs	https://doi.org/10.1016/B978-0-08-034341-9.50038-3
Publication status	Published - 1989
MoE publication type	A4 Article in a conference publication
Event	7th International Conference on Fracture (ICF7) - Houston, United States Duration: 20 Mar 1989 → 24 Mar 1989

Conference

Conference	7th International Conference on Fracture (ICF7)
Country/Territory	United States
City	Houston
Period	20/03/89 → 24/03/89

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10.1016/B978-0-08-034341-9.50038-3

Cite this

@inproceedings{faed367dc321420a8780218686c5af87,

title = "Fracture toughness testing in the ductile-brittle transition region",

abstract = "Fracture toughness testing in the ductile-brittle transition regime is often problematic. In this region both constraint effects as well as ductile tearing will affect the brittle fracture probability. This causes the scatter to grow very large in the transition region. Up till now there has not existed any kind of reliable means of how to validate such data. In this paper a new method for validation is presented.Based on a theoretical cleavage fracture model, it is possible to evaluate the effect of ductile tearing on the cleavage fracture probability. When combining this model with the knowledge from finite element calculations of the plastic zone, it is not only possible to evaluate a minimum specimen size to obtain valid brittle fracture toughness results, but it is also possible to change the invalid results into valid results. It is also possible to describe the fracture probability of large specimens and structures from the results obtained with “invalid size” specimens.",

author = "Kim Wallin",

year = "1989",

doi = "10.1016/B978-0-08-034341-9.50038-3",

language = "English",

isbn = "978-0-08-034341-9",

volume = "1",

pages = "267--276",

editor = "K. Salama and K. Ravi-Chandar and D.M.R. Taplin and {Rama Rao}, P.",

booktitle = "Proceedings of the 7th International Conference on Fracture (ICF7)",

publisher = "Pergamon Press",

address = "United Kingdom",

note = "7th International Conference on Fracture (ICF7) ; Conference date: 20-03-1989 Through 24-03-1989",

}

Wallin, K 1989, Fracture toughness testing in the ductile-brittle transition region. in K Salama, K Ravi-Chandar, DMR Taplin & P Rama Rao (eds), Proceedings of the 7th International Conference on Fracture (ICF7): Brittle Fracture, Ductile Fracture, Dynamic Fracture. vol. 1, Pergamon Press, pp. 267-276, 7th International Conference on Fracture (ICF7), Houston, Texas, United States, 20/03/89. https://doi.org/10.1016/B978-0-08-034341-9.50038-3

Fracture toughness testing in the ductile-brittle transition region. / Wallin, Kim.

Proceedings of the 7th International Conference on Fracture (ICF7): Brittle Fracture, Ductile Fracture, Dynamic Fracture. ed. / K. Salama; K. Ravi-Chandar; D.M.R. Taplin; P. Rama Rao. Vol. 1 Pergamon Press, 1989. p. 267-276.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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N2 - Fracture toughness testing in the ductile-brittle transition regime is often problematic. In this region both constraint effects as well as ductile tearing will affect the brittle fracture probability. This causes the scatter to grow very large in the transition region. Up till now there has not existed any kind of reliable means of how to validate such data. In this paper a new method for validation is presented.Based on a theoretical cleavage fracture model, it is possible to evaluate the effect of ductile tearing on the cleavage fracture probability. When combining this model with the knowledge from finite element calculations of the plastic zone, it is not only possible to evaluate a minimum specimen size to obtain valid brittle fracture toughness results, but it is also possible to change the invalid results into valid results. It is also possible to describe the fracture probability of large specimens and structures from the results obtained with “invalid size” specimens.

AB - Fracture toughness testing in the ductile-brittle transition regime is often problematic. In this region both constraint effects as well as ductile tearing will affect the brittle fracture probability. This causes the scatter to grow very large in the transition region. Up till now there has not existed any kind of reliable means of how to validate such data. In this paper a new method for validation is presented.Based on a theoretical cleavage fracture model, it is possible to evaluate the effect of ductile tearing on the cleavage fracture probability. When combining this model with the knowledge from finite element calculations of the plastic zone, it is not only possible to evaluate a minimum specimen size to obtain valid brittle fracture toughness results, but it is also possible to change the invalid results into valid results. It is also possible to describe the fracture probability of large specimens and structures from the results obtained with “invalid size” specimens.

U2 - 10.1016/B978-0-08-034341-9.50038-3

DO - 10.1016/B978-0-08-034341-9.50038-3

M3 - Conference article in proceedings

SN - 978-0-08-034341-9

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SP - 267

EP - 276

BT - Proceedings of the 7th International Conference on Fracture (ICF7)

A2 - Salama, K.

A2 - Ravi-Chandar, K.

A2 - Taplin, D.M.R.

A2 - Rama Rao, P.

PB - Pergamon Press

T2 - 7th International Conference on Fracture (ICF7)

Y2 - 20 March 1989 through 24 March 1989

ER -

Fracture toughness testing in the ductile-brittle transition region

Abstract

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