Surface fatigue crack life and penetration behavior of stress concentration specimen

Nam, Ki-Woo; Ando, Kotoji; Ogura, Nobukazu

doi:10.1016/0013-7944(94)00235-a

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…4(b) shows crack growth characteristics of the front and back surface after penetration. It can be seen that the calculated results show good agreement with experimental results 13 –15 …”

Section: Propagation Behaviour Of a Fatigue Cracksupporting

confidence: 74%

Acoustic emission from surface fatigue cracks in SS41 steel

Nam

1999

Fatigue Fract Eng Mat Struct

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Crack penetration behaviour by fatigue crack propagation and the measurements of acoustic emission (AE) before and after crack penetration were examined using SS41 steel plate. The experimental crack shape of the SU type which has an out‐of‐plane degree of freedom was in good agreement with the calculated shape. But this was not so for the S type which has a restriction to out‐of‐plane freedom. The crack propagation behaviour on the front surface appears not to change markedly after penetration. However, crack growth on the back surface appears to accelerate. As a crack propagates, substantial acoustic emission occurred just prior to penetration. Then it decreased and the crack penetrated. Intense AE emanation has been attributed to a transition from a plane strain condition to a plane stress condition.

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“…4(b) shows crack growth characteristics of the front and back surface after penetration. It can be seen that the calculated results show good agreement with experimental results 13 –15 …”

Section: Propagation Behaviour Of a Fatigue Cracksupporting

confidence: 74%

Acoustic emission from surface fatigue cracks in SS41 steel

Nam

1999

Fatigue Fract Eng Mat Struct

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Characteristics of elastic waves generated by fatigue crack penetration and growth in an aluminum plate

Ahn

Nam

2003

KSME International Journal

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Crack opening behavior of penetrated crack under fatigue load

Nam

Ahn

2002

KSME International Journal

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The leak-before-break (LBB) behaviors of a structural component under high and low fatigue loads are an important problem in nuclear power plants, liquid nitrogen gas tankers and chemical plants. This paper is an experimental study to evaluate the crack opening behavior after penetration for plate and pipe specimens. Crack opening displacement after penetration under low fatigue load could be satisfactorily determined at the center of the plate thickness regardless of the specimen size. In the case of high fatigue load, it is shown that the crack opening displacement at the center of a penetrated crack can be derived using the gross stress, O'G, and the front surface crack length, as, together with the back surface crack length, abo

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Surface fatigue crack life and penetration behavior of stress concentration specimen

Cited by 4 publications

References 14 publications

Acoustic emission from surface fatigue cracks in SS41 steel

Acoustic emission from surface fatigue cracks in SS41 steel

Characteristics of elastic waves generated by fatigue crack penetration and growth in an aluminum plate

Crack opening behavior of penetrated crack under fatigue load

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