Crack linkup: An experimental analysis

L. Ma; A. S. Kobayashi; S. N. Atluri; P. W. Tan

doi:10.1177/0014485102042002202

Crack linkup: An experimental analysis

L. Ma, A. S. Kobayashi, S. N. Atluri, P. W. Tan

Mechanical Engineering

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

8 Scopus citations

Abstract

The T_ε^* integral was used to assess stable crack growth and crack linkup in 0.8 mm thick 2024-T3 aluminum tension specimens with multiple site damage (MSD) under monotonic and cyclic loads. The T_ε^* values were obtained directly from the recorded moiré fringes on the fracture specimens with and without MSD. The T_ε^* resistance curves of these fracture specimens of different geometries were in excellent agreement with each other. The results suggest that T_ε^* is a material parameter which can be used to characterize crack growth and linkup in the absence of large overloading. T_ε^* based crack growth and net-section-yield based crack linkup criteria for MSD specimens are proposed. The crack tip opening angle (CTOA) criterion can also be used to correlate crack growth larger than 2 mm.

Original language	English
Pages (from-to)	147-152
Number of pages	6
Journal	Experimental Mechanics
Volume	42
Issue number	2
DOIs	https://doi.org/10.1177/0014485102042002202
State	Published - Jun 2002

Keywords

Crack linkup
Fracture mechanics
Moiré interferometry
Multiple site damage (MSD)
Stable crack growth

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title = "Crack linkup: An experimental analysis",

abstract = "The Tε* integral was used to assess stable crack growth and crack linkup in 0.8 mm thick 2024-T3 aluminum tension specimens with multiple site damage (MSD) under monotonic and cyclic loads. The Tε* values were obtained directly from the recorded moir{\'e} fringes on the fracture specimens with and without MSD. The Tε* resistance curves of these fracture specimens of different geometries were in excellent agreement with each other. The results suggest that Tε* is a material parameter which can be used to characterize crack growth and linkup in the absence of large overloading. Tε* based crack growth and net-section-yield based crack linkup criteria for MSD specimens are proposed. The crack tip opening angle (CTOA) criterion can also be used to correlate crack growth larger than 2 mm.",

keywords = "Crack linkup, Fracture mechanics, Moir{\'e} interferometry, Multiple site damage (MSD), Stable crack growth",

author = "L. Ma and Kobayashi, {A. S.} and Atluri, {S. N.} and Tan, {P. W.}",

year = "2002",

month = jun,

doi = "10.1177/0014485102042002202",

language = "English",

volume = "42",

pages = "147--152",

journal = "Experimental Mechanics",

issn = "0014-4851",

number = "2",

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TY - JOUR

T1 - Crack linkup

T2 - An experimental analysis

AU - Ma, L.

AU - Kobayashi, A. S.

AU - Atluri, S. N.

AU - Tan, P. W.

PY - 2002/6

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N2 - The Tε* integral was used to assess stable crack growth and crack linkup in 0.8 mm thick 2024-T3 aluminum tension specimens with multiple site damage (MSD) under monotonic and cyclic loads. The Tε* values were obtained directly from the recorded moiré fringes on the fracture specimens with and without MSD. The Tε* resistance curves of these fracture specimens of different geometries were in excellent agreement with each other. The results suggest that Tε* is a material parameter which can be used to characterize crack growth and linkup in the absence of large overloading. Tε* based crack growth and net-section-yield based crack linkup criteria for MSD specimens are proposed. The crack tip opening angle (CTOA) criterion can also be used to correlate crack growth larger than 2 mm.

AB - The Tε* integral was used to assess stable crack growth and crack linkup in 0.8 mm thick 2024-T3 aluminum tension specimens with multiple site damage (MSD) under monotonic and cyclic loads. The Tε* values were obtained directly from the recorded moiré fringes on the fracture specimens with and without MSD. The Tε* resistance curves of these fracture specimens of different geometries were in excellent agreement with each other. The results suggest that Tε* is a material parameter which can be used to characterize crack growth and linkup in the absence of large overloading. Tε* based crack growth and net-section-yield based crack linkup criteria for MSD specimens are proposed. The crack tip opening angle (CTOA) criterion can also be used to correlate crack growth larger than 2 mm.

KW - Crack linkup

KW - Fracture mechanics

KW - Moiré interferometry

KW - Multiple site damage (MSD)

KW - Stable crack growth

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