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    • 8. 发明授权
    • Method for evaluating the fatigue strength of welded joints
    • 评估焊接接头疲劳强度的方法
    • US07448280B2
    • 2008-11-11
    • US11833628
    • 2007-08-03
    • Claude Marcel Mons
    • Claude Marcel Mons
    • G01N3/20
    • B23K26/34B23K26/32B23K31/12B23K2103/14G01N3/00G01N2203/0005G01N2203/0066G01N2203/0067G01N2203/0073
    • Method for evaluating the fatigue strength of welded joints produced by melting an alloy using a specified welding technique, which method comprises the following steps: a statistically significant number N of specimens are produced with a welded joint using said welding technique; each of the specimens is subjected to cyclic fatigue tests, with an alternating stress a, until failure; the size of the relevant defect appearing in the fracture plane of the specimens is measured by fractography; a range of defect dimensions for which the probability of measuring by fractography a defect outside the range is less than a predetermined level of probability t is determined from the measured sizes; and the lowest stress σmin liable to cause the specimen to fail with a level of probability t is determined from this range.
    • 用于通过使用规定的焊接技术对合金进行熔融而得到的焊接接头的疲劳强度进行评价的方法,该方法包括以下步骤:使用所述焊接技术,用焊接接头制造统计学上显着的N个试样; 每个样品进行循环疲劳试验,交替应力a,直到失效; 通过断面测量样品断裂面出现的相关缺陷的大小; 根据测量的尺寸确定通过断层图测量范围之外的缺陷小于预定的概率水平t的缺陷尺寸范围; 并且从该范围确定易于导致样品以概率t水平故障的最低应力σσmin