EFFECT OF WAVEFORM ON CORROSION FATIGUE CRACK GROWTH

被引：8

作者：

KAWAI, S

KOIBUCHI, K

机构：

[1] Mechanical Engineering Research Laboratory, Hitachi Ltd., Tsuchiura City, Ibaraki

来源：

FATIGUE OF ENGINEERING MATERIALS AND STRUCTURES | 1979年 / 1卷 / 04期

关键词：

D O I：

10.1111/j.1460-2695.1979.tb01327.x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Abstract A study was made on the effects of stress rise time T1, maximum stress holding time T2, stress decreasing time T3 and minimum stress holding time T4 of a cycle on fatigue crack growth for a low alloy carbon steel in 3% NaCl solution. Measurements of the effective stress intensity range ratio U and observations of crack tip response were performed to clarify the causes of waveform effects. The results were summarized as follows; T1 had a strong accelerating effect due to corrosive dissolution of the fresh surfaces of the crack which were formed during T1. The crack growth rate was enhanced as T1 increased and reached a constant value (about 3 times that in air) after T1= 10s. The crack growth rate at low ΔK, however, decreased as T1 increased more than T1= 1 s. T2, T3 and T4 decreased the crack growth rate. The extent of decrease not only depended on the period of T2 (or T3, T4), but also on ΔK and T1. A previously derived crack growth law which considered waveform and frequency effects, is also valid to a first approximation for the present results. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：395 / &

共 11 条

[1]

Kawai S., Koibuchi K., Effects of waveforms and frequencies on fatigue crack growth in 3% NaCl solution, Trans. JSME, 44, (1977)

[2]

McMahon C.J., (1973)

[3]

Wei R.P., Simmons G.W., (1973)

[4]

Gross B., Srawley J.E., Brown W.F., (1964)

[5]

Kikukawa M., Jyono M., (1976)

[6]

Elber W., (1971)

[7]

Newman J.C., (1974)

[8]

Vitek V., Plane strain stress intensity factors for branched cracks, Int. J. Fract., 13, (1977)

[9]

Crooker T.W., Bogar F.D., Cares W.R., (1976)

[10]

Gallagher J.P., Wei R.D., (1972)

← 1 2 →