{"title":"不同铁素体晶粒尺寸0.21% c钢光滑试样小裂纹扩展速率的统计特性","authors":"M. Goto, N. Kawagoishi, H. Nisitani, H. Miyagawa","doi":"10.1299/JSMEA1993.39.1_1","DOIUrl":null,"url":null,"abstract":"In order to investigate the scatter characteristics of growth rate for small cracks rotating-bending fatigue tests of smooth specimens were carried out using 0.21% carbon steels with different ferrite grain sizes. Fifteen to eighteen specimens were fatigued at each stress amplitude, and the growth rate of a crack which led to the fracture was measured for all the specimens. The growth data were analyzed statistically. The results show that the growth rate for each crack length can be expressed by a three- or two-parameter Weibull distribution. The CV, coefficient of variance, for crack growth rate distribution was calculated, and using the CV the relations between the scatter in growth rate and the ferrite grain size were investigated.","PeriodicalId":143127,"journal":{"name":"JSME international journal. Series A, mechanics and material engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1996-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"STATISTICAL PROPERTY OF SMALL-CRACK GROWTH RATE IN 0.21% C STEEL SMOOTH SPECIMENS HAVING DIFFERENT FERRITE GRAIN SIZES\",\"authors\":\"M. Goto, N. Kawagoishi, H. Nisitani, H. Miyagawa\",\"doi\":\"10.1299/JSMEA1993.39.1_1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to investigate the scatter characteristics of growth rate for small cracks rotating-bending fatigue tests of smooth specimens were carried out using 0.21% carbon steels with different ferrite grain sizes. Fifteen to eighteen specimens were fatigued at each stress amplitude, and the growth rate of a crack which led to the fracture was measured for all the specimens. The growth data were analyzed statistically. The results show that the growth rate for each crack length can be expressed by a three- or two-parameter Weibull distribution. The CV, coefficient of variance, for crack growth rate distribution was calculated, and using the CV the relations between the scatter in growth rate and the ferrite grain size were investigated.\",\"PeriodicalId\":143127,\"journal\":{\"name\":\"JSME international journal. Series A, mechanics and material engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1996-01-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"JSME international journal. Series A, mechanics and material engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1299/JSMEA1993.39.1_1\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"JSME international journal. Series A, mechanics and material engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1299/JSMEA1993.39.1_1","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
STATISTICAL PROPERTY OF SMALL-CRACK GROWTH RATE IN 0.21% C STEEL SMOOTH SPECIMENS HAVING DIFFERENT FERRITE GRAIN SIZES
In order to investigate the scatter characteristics of growth rate for small cracks rotating-bending fatigue tests of smooth specimens were carried out using 0.21% carbon steels with different ferrite grain sizes. Fifteen to eighteen specimens were fatigued at each stress amplitude, and the growth rate of a crack which led to the fracture was measured for all the specimens. The growth data were analyzed statistically. The results show that the growth rate for each crack length can be expressed by a three- or two-parameter Weibull distribution. The CV, coefficient of variance, for crack growth rate distribution was calculated, and using the CV the relations between the scatter in growth rate and the ferrite grain size were investigated.
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