• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science & Engineering. A, Structural Materials: Properties, Microstructure and Processing >Cavity mediated strain localization and overall utility in eutectic tin-lead alloy
【24h】

Cavity mediated strain localization and overall utility in eutectic tin-lead alloy

机译：共晶锡铅合金中空穴介导的应变局部化及其整体应用

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

A combined experimental and numerical study is undertaken to examine the effects of pre-machined holes on strain localization and overall ductility in eutectic tin-lead alloy. Thin-sheet specimens with equal-sized holes aligned in the tensile loading direction are used. The tensile tests were performed at room temperature with a nominal strain rate of 0.001 s~(-1). The specimen, containing one hole, showed a significant reduction in ductility compared to the control (no-hole) specimen. With an increasing number of holes, however, the overall strain-to-failure increases and fracture tend to follow shear bands generated locally from the hole edges. Finite element analyses, taking into account the viscoplastic response, were carried out to provide a mechanistic rationale to corroborate the experimental findings. The dispersion of plastic deformation and the effect of hole interaction are both found to contribute to the observed behavior. The local maximum equivalent plastic strain decreases with increasing number of holes, resulting in more delayed fracture. Plastic deformation becomes more intense inside the shear band when the holes are spaced more closely, which explains the increasing propensity of fracture along the shear bands in specimens containing more pre-machined holes.
机译：进行了组合的实验和数值研究，以检验预加工孔对共晶锡铅合金中应变局部化和整体延展性的影响。使用在拉伸载荷方向上对齐的具有相等大小孔的薄片样品。拉伸试验在室温下以0.001 s〜（-1）的名义应变率进行。与对照（无孔）样品相比，包含一个孔的样品的延展性显着降低。但是，随着孔数量的增加，总体应变破坏增加，并且断裂趋于遵循从孔边缘局部产生的剪切带。考虑到粘塑性响应，进行了有限元分析，以提供机械原理来证实实验结果。发现塑性变形的散布和空穴相互作用的影响均有助于观察到的行为。局部最大等效塑性应变随着孔数量的增加而减小，从而导致更多的延迟断裂。当孔之间的距离更近时，剪切带内部的塑性变形会变得更强烈，这说明了在包含更多预加工孔的样品中，沿着剪切带的断裂倾向增加。

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