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TECHNICAL PAPERS

Damage Zone Around Tip of an Interface Crack Between Rubber-Modified Epoxy Resin and Aluminum

[+] Author and Article Information
Deok-Bo Lee

the BK21 Division for Research and Education in Mechanical Engineering, Hanyang University, 17 Haengdang-dong, Sungdong-ku, Seoul, 133-791, Korea

Toru Ikeda, Noriyuki Miyazaki

Department of Chemical Engineering, Graduate School of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan

Nak-Sam Choi

Department of Mechanical Engineering, Hanyang University, 1271 Sa-1 dong, Ansan-si, Kyunggi-do, 425-791, Korea

J. Eng. Mater. Technol 124(2), 206-214 (Mar 26, 2002) (9 pages) doi:10.1115/1.1417980 History: Received May 25, 2000; Revised June 05, 2001; Online March 26, 2002
Copyright © 2002 by ASME
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References

Figures

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A bonded specimen and the coordinate system in the bent specimen. (a) Bonded specimen; (b) the coordinate system in the bent specimen.
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Principal stresses and angles of principal axes caused by residual stress around an interface crack tip. (a) Principal stress, σ12; (b) direction of principal axis.
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Conceptual figure describing the deformation mechanism of rubber particles around an interface crack under residual stress
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Observations around a crack tip in bulk rubber-modified epoxy and around an interface crack tip between aluminum and rubber-modified epoxy resin observed with an optical microscope. (a) Around a crack tip in bulk rubber-modified epoxy; (b) around an interface crack tip betweem aluminum and rubber-modified epoxy resin.
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Rubber particles around a crack tip observed by an optical microscope. (a) Bulk rubber-modified epoxy; (b) interface crack (slightly extended crack tip shown in Fig. 9).
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Rubber particles observed by an atomic force microscope (AFM). (a) Cavitated rubber particle in the damage zone of bulk specimen; (b) debonded rubber particle around an interface crack tip.
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A spherical inclusion in an infinite media under uniform tension
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The variation of the ratio of σnmax and σH with n under σ1=nσ0 and σ230 for the different values of Γ in the case of ν1=0.4 and ν2=0.45
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The variation of the ratio of σnmax and σH with n under σ1=nσ0 and σ230 for the different values of ν1 in the case of Γ=0.001 and ν2=0.45
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The variation of the ratio of σnmax and σH with n under σ1=nσ0 and σ230 for the different values of ν2 in the case of Γ=0.001 and ν1=0.40
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The variation of the ratio of σnmax and σH with n under σ1=nσ0 and σ23=−σ0 for the different values of ν1 in the case of Γ=0.001 and ν2=0.45
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Load-displacement diagrams of the notched jointed half disks specimen (NJHD) and the notched disk specimen (ND)
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Rubber particles around a crack tip in virgin specimens, observed by an optical microscope. (a) Around a crack in bulk epoxy resin; (b) around an interface crack in a joint specimen.
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Normal stress and shear stress caused by residual stress around an interface crack tip. (a) Normal stress, σyy; (b) shear stress, τxy.
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Coordinate system around an interface crack
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Mold for notched jointed half disks (NJHD) specimen
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Notched jointed half disks (NJHD) specimen (unit: mm)
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Superposition of a known problem on an unknown problem
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Measurement of the difference of total expansion ratio between resin and metal, Δβ, using a strain gauge. (a) A bonded specimen before delamination with a strain gauge; (b) a specimen after debonding along the interface.

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