首页> 外文会议>Biennial European conference on fracture >INFLUENCE OF SMALL SURFACE DISCONTINUITIES AT THE WELD TOE ON BENDING FATIGUE STRENGTH
【24h】

INFLUENCE OF SMALL SURFACE DISCONTINUITIES AT THE WELD TOE ON BENDING FATIGUE STRENGTH

机译:小型表面不连续性在焊接脚趾对弯曲疲劳强度的影响

获取原文

摘要

Results of bending fatigue strength on specimens with synthetic CGHAZ microstructure which were smooth and flawed at the surface were discussed in respect of flaw size and mechanical properties. Specimens were grooved to cause similar stress concentration as that existing at the weld toe. Artificial flaws were single and series of Vickers indentations of the size comparable to the characteristic dimensions of CGHAZ microstructure. Threshold stress intensity factor is a linear function of strength and a parabolic function of flaw size. Bending fatigue strength increases with the strength in the case of significant flaw size and/or harder CGHAZ microstructure. But, it is also increased by local plastic deformation which has happened at the weld toe in the case of insignificant flaw size and/or softer CGHAZ microstructure.
机译:在缺陷和机械性能方面讨论了在表面光滑且缺陷的合成CGHAZ微观结构上弯曲疲劳强度的结果。被凹槽的标本引起与焊接脚趾处存在的相似的应力浓度。人工缺陷是单一的维氏Vickers缩进,其尺寸与CGHAZ微观结构的特征尺寸相当。阈值应力强度因子是强度的线性函数和缺陷尺寸的抛物线功能。在显着缺陷和/或更难的CGHAZ微观结构的情况下,弯曲疲劳强度随着强度而增加。但是,在焊接脚趾上发生的局部塑性变形也是增加的,在微不足道的缺陷和/或更柔软的CGHAZ微观结构的情况下发生了局部塑性变形。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号