Effects of Negative Stress Ratios on Crack Propagation Behavior After an Overload

Makabe, Chobin; McEvily, A.J.; Purnowidodo, Anindito; Yamauchi, Akihiro

doi:10.1142/s0217979203019356

Cited by 11 publications

(17 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Disamping itu pengamatan terhadap perilaku perambatan retak relatif lebih mudah (Mc.Evily et al, 1990, 2004Bao et al, 1995;Makabe et al, 2003Makabe et al, , 2005Purnowidodo et al, 2004). Perilaku rambat retak fatigue pada benda uji yang berbentuk silindris, misalkan poros pejal, belum banyak dikaji sehingga hal ini penting untuk diteliti karena komponen berbentuk silindris, misalnya poros (shaft) banyak digunakan, misalnya poros roda pada kendaraan bermotor, rotor turbin pesawat dan pada industri gula, misalnya poros mollen roll untuk penggilingan gula.…”

Section: Pendahuluanunclassified

Perilaku Rambat Retak Pada Poros Pejal Setelah Bending Overloads

Purnowidodo

2014

JEEST

View full text Add to dashboard Cite

Teknik Mesin Universitas Brawijaya Jl. MT. Haryono 167 Malang 65145 ABSTRAKPenelitian rambat retak pada poros pejal berbentuk silindris dilakukan dengan cara eksperimen, pengamatan kecepatan dan perilaku rambat retak setelah siklus beban berulang bending overload dilakukan dengan mengamati retak yang merambat pada permukaan specimen yang berbentuk poros pejal.Dari hasil penelitian ini diketahui bahwa terdapat perbedaan perilaku rambat retak antara specimen tanpa overload dan dengan overload. Pada specimen dengan diameter 8 mm, setelah overload umur retak bertambah pendek dan kecepatan retak meningkat. Pada specimen dengan diameter 9 mm, setelah overload umur retak akan bertambah panjang dan kecepatan retak akan menurun. Perilaku rambat retak setelah overload pada poros pejal tergantung dari ukuran diameter. Kemungkinan penyebabnya adalah berhubungan dengan arah rambat retak dibawah permukaan specimen.

show abstract

Section: Pendahuluanunclassified

Perilaku Rambat Retak Pada Poros Pejal Setelah Bending Overloads

Purnowidodo

2014

JEEST

View full text Add to dashboard Cite

show abstract

“…Furthermore, the compressive loading part of negative force ratio conditions has a detrimental effect on fatigue crack growth. This has been proven for constant and variable amplitude loading . The influence of the compressive loading part is accepted in fatigue community and is accounted by empirical relations and in crack growth models, for example, in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…This has been proven for constant and variable amplitude loading. [8][9][10][11] The influence of the compressive loading part is accepted in fatigue community and is accounted by empirical relations and in crack growth models, for example, in Refs. [12,13].…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack growth testing at negative stress ratios: discussion on the comparability of testing results

Benz

Sander

2013

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

A B S T R A C T It is an accepted fact in fatigue community that compressive loads contribute to fatigue crack growth. Evidences range from fatigue crack growth under fully compressive loads to effects of compressive underloads to negative stress ratio loading. Because the crack closes under compression and the crack flanks transmit compressive stresses, the loading situation is completely different to those of tensile loading. The present paper addresses the comparability of crack growth testing procedures at negative stress ratios. It reveals that compressive loading at the crack tip differs in different specimens for an equal maximum stress intensity factor K max and negative stress ratio R. Furthermore, the crack length can significantly influence the loading conditions at the crack tip for tensioncompression loading. Depending on the specimen type and crack length, a negative force ratio may lead to a change of algebraic sign of the stresses at the crack tip or not. As a consequence, the comparability of available literature results for R ≤ 0 tests is not ensured. Proposals to improve the comparability of tension-compression crack growth testing will be given.

show abstract

“…For example, a fatigue crack propagation behavior will change after an overload. It is well known that the fatigue crack propagation rate can be arrested following overloads [1][2][3][4]. The main cause of the retardation associated with an overload is compressive residual stress developing in front of the crack tip upon unloading to baseline [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the fatigue crack propagation rate can be arrested following overloads [1][2][3][4]. The main cause of the retardation associated with an overload is compressive residual stress developing in front of the crack tip upon unloading to baseline [2][3][4]. However, under some loading conditions of negative stress ratio, the tensile residual stress generated in front of the crack tip following the overload is the major factor in the acceleration of the crack propagation rate [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

P-12 Effects of an overload-affected zone on fatigue crack propagation behavior after applying a single overload

Yamauchi

Miyazaki

Purnowidodo

et al. 2007

ATEM

View full text Add to dashboard Cite

The fatigue crack growth rate actually accelera ted after a tensile overload under a negative value of baseline stress ratio R. This type of crack propagation behavior was related to tensile residual stress state distributed in the vicinity of the crack tip after an overload. In the present investigation, it was found that the delay and the acceleration extent of the crack propagation associated with the size of reversed plastic zone developing in the overload-affected zone when the crack tip penetrated in this zone under baseline stress ratio. Because knowing the variation of crack opening stress level is needed to evaluate a crack propagation rate under a variable loading, the prediction of the crack opening stress level using the values crack propagation rate, da/dN, was performed. Also, fatigue life after overload was evaluated.

show abstract

Effects of Negative Stress Ratios on Crack Propagation Behavior After an Overload

Cited by 11 publications

References 3 publications

Perilaku Rambat Retak Pada Poros Pejal Setelah Bending Overloads

Perilaku Rambat Retak Pada Poros Pejal Setelah Bending Overloads

Fatigue crack growth testing at negative stress ratios: discussion on the comparability of testing results

P-12 Effects of an overload-affected zone on fatigue crack propagation behavior after applying a single overload

Contact Info

Product

Resources

About