• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>US Rock Mechanics Symposium >Role of Microstructure Size in Fracture Process Zone Development of Marble
【24h】

Role of Microstructure Size in Fracture Process Zone Development of Marble

机译：微观结构大小在大理石骨折过程区域开发中的作用

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The fracture process zone (FPZ), a zone of weakened material surrounding the tip of a propagating crack, is common to many brittle materials, and is likely related to brittle material damage mechanisms. This study follows recent investigations of Carrara Marble and asks whether microstructure size, such as the size of marble grains, leads to an different extent of damage for a brittle material. Existing work has used acoustic emissions or laser interferometry and optical microscopy to answer this question, and found a positive relationship between grain size and size of the FPZ. Our study uses nanoindentation to probe the nanomechanical properties of the FPZ for two marbles of varying grain size, and attempts to relate mechanical properties of the FPZ to grain size. The marbles are from Carrara, Italy (typical grain size 300 μm), and Danby, Vermont (typical grain size 520 μm). Grids of nanoindentations were placed within the FPZ regions of Danby and Carrara marble specimens. Both marbles exhibited lower nanomechanical properties near the crack tip and near the area of future wing-crack formation, i. e. the FPZ. However, the Danby (large microstructure) marble exhibited this trend over a larger distance, and thus provides nanomechanical support for the increase of the FPZ with grain size.
机译：裂缝处理区（FPZ），围绕着传播裂缝尖端的弱化材料区是许多脆性材料的常见，并且可能与脆性材料损伤机制有关。本研究遵循Carrara Marble的最近调查，并询问微观结构尺寸，如大理石颗粒的尺寸，导致脆性材料的损伤程度不同。现有的工作已经使用了声排放或激光干涉测量和光学显微镜来回答这个问题，发现了FPZ的晶粒尺寸和大小之间的正关系。我们的研究使用纳米intentation探测FPZ的纳米力学性质，对于两个不同的晶粒尺寸的大理石，并试图将FPZ的机械性能与晶粒尺寸相关。大理石来自卡拉拉，意大利（典型的粒度300μm）和丹麦，佛蒙特州（典型的粒度为520μm）。将纳米贴膜的网格置于丹麦和卡拉拉大理石标本的FPZ区域内。两个大理石在裂缝尖端附近的纳米机械性质较低，靠近未来翼裂缝的面积，i。 e。 FPZ。然而，丹比（大型微观结构）大理石在更大的距离上表现出这种趋势，因此为具有晶粒尺寸的FPZ的增加提供了纳米力学支持。

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