Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy

H. Matsunaga; M. Makizaki; D. F. Socie; K. Yanase; M. Endo

doi:10.1016/j.engfracmech.2014.04.015

Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy

H. Matsunaga
, M. Makizaki
, D. F. Socie
, K. Yanase
, M. Endo

Strength of materials

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

7 Citations (Scopus)

Abstract

The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high δ. K regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy.

Original language	English
Pages (from-to)	126-136
Number of pages	11
Journal	Engineering Fracture Mechanics
Volume	123
DOIs	https://doi.org/10.1016/j.engfracmech.2014.04.015
Publication status	Published - Jun 2014

All Science Journal Classification (ASJC) codes

General Materials Science
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.engfracmech.2014.04.015

Cite this

@article{fff149c6130940c69d8353d0d295186a,

title = "Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy",

abstract = "The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high δ. K regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy.",

keywords = "7075 Aluminum alloy, Crack closure, Fatigue crack growth, Occasional shear loading, Shear-mode growth",

author = "H. Matsunaga and M. Makizaki and Socie, \{D. F.\} and K. Yanase and M. Endo",

note = "Funding Information: This research was in part sponsored by Japanese Ministry of Education, Science, Sports and Culture , Grant-in-Aid for Scientific Research (C) (Fund number 22560092 , 2010{\textendash}2012) and in part by Shiraisi Research Fund (Fukuoka University). The first author gratefully acknowledges the support of the International Institute for Carbon Neutral Energy Research (WPI-I2CNER), sponsored by the Japanese Ministry of Education, Culture, Sports, Science and Technology.",

year = "2014",

month = jun,

doi = "10.1016/j.engfracmech.2014.04.015",

language = "English",

volume = "123",

pages = "126--136",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy

AU - Matsunaga, H.

AU - Makizaki, M.

AU - Socie, D. F.

AU - Yanase, K.

AU - Endo, M.

N1 - Funding Information: This research was in part sponsored by Japanese Ministry of Education, Science, Sports and Culture , Grant-in-Aid for Scientific Research (C) (Fund number 22560092 , 2010–2012) and in part by Shiraisi Research Fund (Fukuoka University). The first author gratefully acknowledges the support of the International Institute for Carbon Neutral Energy Research (WPI-I2CNER), sponsored by the Japanese Ministry of Education, Culture, Sports, Science and Technology.

PY - 2014/6

Y1 - 2014/6

N2 - The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high δ. K regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy.

AB - The effect of an occasional mode II loading on the subsequent mode I fatigue crack growth was investigated in a thin-walled 7075-T6511 aluminum alloy tube. Careful observation of crack growth behavior revealed that an occasional mode II loading has two contrasting effects on the subsequent crack growth. First is a retardation effect that is associated with a crack closure development due to the mode II loading. However, this effect was insignificant with respect to the crack growth life as a whole. Second is an acceleration effect that is associated with an accelerated crack growth rate in mode II. It was found that, in a relatively high δ. K regime, mode II crack growth was from one to two orders of magnitude faster than mode I crack growth. This study shows that mode II crack growth should be considered as a predominant factor in evaluating the effect of an occasional mode II loading for a mode I crack in 7075 aluminum alloy.

KW - 7075 Aluminum alloy

KW - Crack closure

KW - Fatigue crack growth

KW - Occasional shear loading

KW - Shear-mode growth

UR - https://www.scopus.com/pages/publications/84901930883

UR - https://www.scopus.com/pages/publications/84901930883#tab=citedBy

U2 - 10.1016/j.engfracmech.2014.04.015

DO - 10.1016/j.engfracmech.2014.04.015

M3 - Article

AN - SCOPUS:84901930883

SN - 0013-7944

VL - 123

SP - 126

EP - 136

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

Acceleration of fatigue crack growth due to occasional mode II loading in 7075 aluminum alloy

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this