• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>JOURNAL OF MARINE SCIENCE AND APPLICATION >The effect of plastic constraint on the initiation of ductile tears in shipbuilding structural steels
【24h】

The effect of plastic constraint on the initiation of ductile tears in shipbuilding structural steels

机译：塑性约束对造船结构钢延性撕裂萌发的影响

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this paper, the effect of plastic constraint on the initiation of ductile tears in four different shipbuilding structural steels has been experimentally studied by measuring the J-integral and crack opening displacement COD at initiation in three-point bend specimens with deep and shallow notches. Experimental results of seven groups of different strength alloy steels show that both delta i and Ji values of ductile tear from the shallow crack specimens which have less constraint flow field are significantly higher than those of deeply notched specimens. Slip-line-field analysis shows that, for shallow crack, the hydrostatic stress is lower than that from standard deeply cracked bend specimen, which develops a high level of crack tip constraint, provides a lower bound estimate of toughness, and will ensure an unduly conservative approach when applied to structural defects, especially if initiation values of COD and J - integral are used.
机译：在本文中，通过测量深和浅凹口的三点弯曲试样的J积分和开裂位移COD，通过实验研究了塑性约束对四种不同造船结构钢中延性撕裂萌发的影响。七组不同强度的合金钢的实验结果表明，约束流场较小的浅裂纹试样的延性撕裂的δi和Ji值均明显高于深槽试样。滑移线分析表明，对于较浅的裂纹，其静水压力要低于标准的深裂纹弯曲试件的静水压力，这会产生较高水平的裂纹尖端约束，提供较低的韧度边界估计，并会确保过大的屈服强度。应用于结构缺陷的保守方法，尤其是如果使用COD和J-积分的初始值。

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