• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Thin-Walled Structures >Assessment of effects of idealized defect shape and width on the burst capacity of corroded pipelines
【24h】

Assessment of effects of idealized defect shape and width on the burst capacity of corroded pipelines

机译：评估理想化缺陷形状和宽度对腐蚀管道爆裂容量的影响

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

This study investigates the burst capacities of corroded pipelines using three-dimensional elasto-plastic finite element analyses validated by full-scale burst tests of corroded pipe specimens reported in the literature. The semi-ellipsoidal idealization of naturally-occurring corrosion defects in FEA is found to lead to more accurate predictions of the burst capacity than the rectangular idealization for defects that are less than 70% through the pipe wall thickness. Results of extensive parametric FEA based on the semi-ellipsoidal idealization of the corrosion defects indicate that the burst capacity in general increases as the defect width increases if the defect depth and length remain the same. The defect width effect is marked for deep, relatively short defects, and should therefore be taken into account accordingly in the empirical or semi-empirical burst capacity models. The defect width effect is marginal for long defects with w/l = 1.5. The observed width effects are explained by considering the change in the membrane and bending stresses in the defect region as the defect width increases.
机译：本研究通过文献中报告的腐蚀管样本的全规模突发测试验证的三维弹塑性有限元分析来研究腐蚀管道的突发容量。发现在FEA中天然存在的腐蚀缺陷的半椭圆形理想化，导致突发容量比通过管壁厚度小于70％的矩形理想的更精确的预测。基于腐蚀缺陷的半椭圆形理想化的广泛参数FEA的结果表明，如果缺陷深度和长度保持不变，缺陷宽度增加，突发容量随着缺陷宽度而增加。缺陷宽度效果标记为深，相对短的缺陷，因此应在经验或半经验突发容量模型中相应地考虑。缺陷宽度效果是具有W / L <= 1.5的长缺陷的边缘。通过考虑缺陷区域中的膜和弯曲应力随着缺陷宽度的增加来解释观察到的宽度效果。

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