Fracture toughness evaluation and specimen size effect

T. Kobayashi, S. Morita, Hiroyuki Toda

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper reviews specimen size effect which significantly affects fracture toughness and fracture behavior of materials mainly based on the present authors' research works. After introducing controversial scale problems on fracture and fracture toughness, various actual examples of the scale problems are presented from a viewpoint of the effects of specimen size on dynamic fracture toughness values in various materials, such as steel for nuclear pressure vessel designated as A508cl.3, ductile cast iron, AC4CH aluminum casting alloy and silicon nitride ceramic. Then, the γ factor which has been introduced by Atkins et al. to interpret differences in fracture behaviors between a specimen (i.e. model) and the actual structure (i.e. prototype) and the Q factor which expresses the discrepancy between the HRR solution and the actual stress distribution at a crack-tip, are described for recognition of the scale problems.

Original languageEnglish
Pages (from-to)52-57
Number of pages6
JournalMaterials Transactions
Volume42
Issue number1
DOIs
Publication statusPublished - Jan 1 2001

Fingerprint

fracture strength
Fracture toughness
evaluation
Aluminum castings
pressure vessels
Steel
crack tips
Pressure vessels
Silicon nitride
Cast iron
silicon nitrides
Crack tips
stress distribution
nitrides
Stress concentration
casts
Q factors
prototypes
steels
ceramics

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Fracture toughness evaluation and specimen size effect. / Kobayashi, T.; Morita, S.; Toda, Hiroyuki.

In: Materials Transactions, Vol. 42, No. 1, 01.01.2001, p. 52-57.

Research output: Contribution to journalArticle

Kobayashi, T. ; Morita, S. ; Toda, Hiroyuki. / Fracture toughness evaluation and specimen size effect. In: Materials Transactions. 2001 ; Vol. 42, No. 1. pp. 52-57.
@article{8092d08fc31c4be5b675be3192732e1f,
title = "Fracture toughness evaluation and specimen size effect",
abstract = "This paper reviews specimen size effect which significantly affects fracture toughness and fracture behavior of materials mainly based on the present authors' research works. After introducing controversial scale problems on fracture and fracture toughness, various actual examples of the scale problems are presented from a viewpoint of the effects of specimen size on dynamic fracture toughness values in various materials, such as steel for nuclear pressure vessel designated as A508cl.3, ductile cast iron, AC4CH aluminum casting alloy and silicon nitride ceramic. Then, the γ factor which has been introduced by Atkins et al. to interpret differences in fracture behaviors between a specimen (i.e. model) and the actual structure (i.e. prototype) and the Q factor which expresses the discrepancy between the HRR solution and the actual stress distribution at a crack-tip, are described for recognition of the scale problems.",
author = "T. Kobayashi and S. Morita and Hiroyuki Toda",
year = "2001",
month = "1",
day = "1",
doi = "10.2320/matertrans.42.52",
language = "English",
volume = "42",
pages = "52--57",
journal = "Materials Transactions",
issn = "0916-1821",
publisher = "The Japan Institute of Metals and Materials",
number = "1",

}

TY - JOUR

T1 - Fracture toughness evaluation and specimen size effect

AU - Kobayashi, T.

AU - Morita, S.

AU - Toda, Hiroyuki

PY - 2001/1/1

Y1 - 2001/1/1

N2 - This paper reviews specimen size effect which significantly affects fracture toughness and fracture behavior of materials mainly based on the present authors' research works. After introducing controversial scale problems on fracture and fracture toughness, various actual examples of the scale problems are presented from a viewpoint of the effects of specimen size on dynamic fracture toughness values in various materials, such as steel for nuclear pressure vessel designated as A508cl.3, ductile cast iron, AC4CH aluminum casting alloy and silicon nitride ceramic. Then, the γ factor which has been introduced by Atkins et al. to interpret differences in fracture behaviors between a specimen (i.e. model) and the actual structure (i.e. prototype) and the Q factor which expresses the discrepancy between the HRR solution and the actual stress distribution at a crack-tip, are described for recognition of the scale problems.

AB - This paper reviews specimen size effect which significantly affects fracture toughness and fracture behavior of materials mainly based on the present authors' research works. After introducing controversial scale problems on fracture and fracture toughness, various actual examples of the scale problems are presented from a viewpoint of the effects of specimen size on dynamic fracture toughness values in various materials, such as steel for nuclear pressure vessel designated as A508cl.3, ductile cast iron, AC4CH aluminum casting alloy and silicon nitride ceramic. Then, the γ factor which has been introduced by Atkins et al. to interpret differences in fracture behaviors between a specimen (i.e. model) and the actual structure (i.e. prototype) and the Q factor which expresses the discrepancy between the HRR solution and the actual stress distribution at a crack-tip, are described for recognition of the scale problems.

UR - http://www.scopus.com/inward/record.url?scp=0034981210&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034981210&partnerID=8YFLogxK

U2 - 10.2320/matertrans.42.52

DO - 10.2320/matertrans.42.52

M3 - Article

VL - 42

SP - 52

EP - 57

JO - Materials Transactions

JF - Materials Transactions

SN - 0916-1821

IS - 1

ER -