Crack Shape Control using Cold Rolling
Crack Shape Control using Cold Rolling
复制标题
使用冷轧控制裂纹形状
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
F. Brennan
中科院分区：
文献类型：
--
作者：
S. Ngiam;F. Brennan
通过试验研究了冷轧对裂纹形状演化的影响.采用一种新发展起来的缝轧技术，在工程结构的特定区域施加不同强度的表面残余压应力，在试件上引入残余压应力，以控制裂纹扩展的速度和形状。对三块经过不同冷轧工艺的BS7191级275A低碳钢板进行了弯曲中周疲劳试验。疲劳裂纹扩展是定期监测使用裂纹尺寸无损检测方法和结果的裂纹形状演变。不同的冷轧工艺对试样的裂纹萌生、裂纹扩展路径和疲劳寿命有显著影响。缝轧件的疲劳寿命显著提高。此外，冷轧被观察到引起裂纹停止和延迟。并与断裂力学的解析解进行了比较。
The effect of cold rolling on crack shape evolution was investigated byexperimentation. A recently developed technique termed stitch rolling, which appliesdiffering intensities of surface compressive residual stress at specific regions in anengineering structure, was adopted to introduce compressive residual stress onto testspecimens to control both the rate and shape of crack propagation. Three BS 7191Grade 275A mild steel plates having undergone different cold rolling procedures weresubjected to medium cycle fatigue tests under bending. Fatigue crack growth wasperiodically monitored using crack sizing non-destructive testing methods and resultsare presented in terms of crack shape evolution. The different cold rolling procedureswere seen to have a significant influence on the crack initiation, crack propagation pathand the overall fatigue life of the specimens. The fatigue lives of stitch rolled specimenswere significantly improved. In addition, cold rolling was observed to have causedcrack arrest and retardation. Comparisons with an analytical fracture mechanicssolution is also presented.
影响因子：
5.4
作者：
NEWMAN, JC;RAJU, IS
通讯作者：
RAJU, IS