Evaluation of fracture toughness of aluminum alloys by tear test

Toshiro Kobayashi; Mitsuo Niinomi; Kouichi Ikeda

doi:10.2464/jilm.38.9

Evaluation of fracture toughness of aluminum alloys by tear test

Toshiro Kobayashi, Mitsuo Niinomi, Kouichi Ikeda

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The correlation between the fracture characteristics values evaluated from the tear test and the fracture toughness values were investigated. New method to evaluate the fracture toughness was examined by the tear test. The correlation between the fracture characteristics (σ_in, UIE_t and UPE_t), which were newly defined based on the true crack initiation point in the tear test and the fracture toughness values (K_IC, J_IC and T_mat) evaluated by the ASTM E-399 method was studied, and a good correlation was recognized between σ_in and K_IC, UIE_t and J_IC, and UPE_t and T_mat, respectively. The critical stress intensity factor (K_C) obtained from the precracked tear test agree well with KIC values evaluated by the ASTM E-399 method. However, K_C obtained from the standard tear test is overestimated about 20% comparing with the K_IC because of the effect of the notch tip radius.

Original language	English
Pages (from-to)	9-15
Number of pages	7
Journal	journal of japan institute of light metals
Volume	38
Issue number	1
DOIs	https://doi.org/10.2464/jilm.38.9
Publication status	Published - 1988
Externally published	Yes

Keywords

J integral
aluminum alloy
fracture toughness
size effect
tear test

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.2464/jilm.38.9

Cite this

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title = "Evaluation of fracture toughness of aluminum alloys by tear test",

abstract = "The correlation between the fracture characteristics values evaluated from the tear test and the fracture toughness values were investigated. New method to evaluate the fracture toughness was examined by the tear test. The correlation between the fracture characteristics (σin, UIEt and UPEt), which were newly defined based on the true crack initiation point in the tear test and the fracture toughness values (KIC, JIC and Tmat) evaluated by the ASTM E-399 method was studied, and a good correlation was recognized between σin and KIC, UIEt and JIC, and UPEt and Tmat, respectively. The critical stress intensity factor (KC) obtained from the precracked tear test agree well with KIC values evaluated by the ASTM E-399 method. However, KC obtained from the standard tear test is overestimated about 20% comparing with the KIC because of the effect of the notch tip radius.",

keywords = "J integral, aluminum alloy, fracture toughness, size effect, tear test",

author = "Toshiro Kobayashi and Mitsuo Niinomi and Kouichi Ikeda",

year = "1988",

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T1 - Evaluation of fracture toughness of aluminum alloys by tear test

AU - Kobayashi, Toshiro

AU - Niinomi, Mitsuo

AU - Ikeda, Kouichi

PY - 1988

Y1 - 1988

N2 - The correlation between the fracture characteristics values evaluated from the tear test and the fracture toughness values were investigated. New method to evaluate the fracture toughness was examined by the tear test. The correlation between the fracture characteristics (σin, UIEt and UPEt), which were newly defined based on the true crack initiation point in the tear test and the fracture toughness values (KIC, JIC and Tmat) evaluated by the ASTM E-399 method was studied, and a good correlation was recognized between σin and KIC, UIEt and JIC, and UPEt and Tmat, respectively. The critical stress intensity factor (KC) obtained from the precracked tear test agree well with KIC values evaluated by the ASTM E-399 method. However, KC obtained from the standard tear test is overestimated about 20% comparing with the KIC because of the effect of the notch tip radius.

AB - The correlation between the fracture characteristics values evaluated from the tear test and the fracture toughness values were investigated. New method to evaluate the fracture toughness was examined by the tear test. The correlation between the fracture characteristics (σin, UIEt and UPEt), which were newly defined based on the true crack initiation point in the tear test and the fracture toughness values (KIC, JIC and Tmat) evaluated by the ASTM E-399 method was studied, and a good correlation was recognized between σin and KIC, UIEt and JIC, and UPEt and Tmat, respectively. The critical stress intensity factor (KC) obtained from the precracked tear test agree well with KIC values evaluated by the ASTM E-399 method. However, KC obtained from the standard tear test is overestimated about 20% comparing with the KIC because of the effect of the notch tip radius.

KW - J integral

KW - aluminum alloy

KW - fracture toughness

KW - size effect

KW - tear test

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Evaluation of fracture toughness of aluminum alloys by tear test

Abstract

Keywords

ASJC Scopus subject areas

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