Fracture Nanomechanics
Fracture Nanomechanics
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DOI：
10.1007/978-981-10-6884-3_6
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Yabin Yan;T. Sumigawa;Licheng Guo;T. Kitamura
中科院分区：
文献类型：
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作者：
Yabin Yan;T. Sumigawa;Licheng Guo;T. Kitamura
本章综述了纳米尺度下小材料断裂力学实验研究的最新进展。重点介绍了作者为研究纳米多层结构和低维单晶材料界面断裂行为而开发的实验系统和测试方法，并给出了主要实验结果。实验研究内容包括：（1）界面自由边裂纹萌生及其力学判据;（2）不同类型悬臂梁试样对界面裂纹萌生位置和模态混合度的调制;（3）用倒T形悬臂梁法评价微观结构对界面裂纹萌生的影响;（4）纳米尺度构件中界面边缘蠕变裂纹萌生;（5）界面疲劳断裂行为及其环境效应;（6）基于共振的高周疲劳新方法和纳米金属的疲劳性能;（7）纳米单晶材料的变形和断裂性能评价。从所获得的结果，作者指出了传统的断裂力学在纳米级组件的适用性。同时，指出了纳米材料断裂行为实验研究中存在的主要问题和难点，并展望了今后的研究方向。
This chapter reviews recent advances in experimental studies on fracture mechanics of small materials on nanometer scales. In particular, experimental systems and some testing methods developed by the current authors are introduced for investigating the fracture behavior of interface in nanoscale multilayered components and low-dimensional single crystalline materials, and main experimental results are presented as well. The experimental studies discussed are:(1) crack initiation from the free edge of interface and its mechanical criterion,(2) modulation of the location of crack initiation and the mode mixity for interface cracking with different types of cantilever specimens,(3) evaluation of the effect of microscopic structure on the interface cracking by an inverted-T-shaped cantilever method,(4) creep crack initiation at an interface edge in nanoscale components,(5) fatigue fracture behavior of interface and the environmental effect,(6) novel resonant vibration based high-cycle fatigue method and the fatigue properties of nano-metals, and (7) evaluation of deformation and fracture properties of nanoscale single crystalline materials. From the obtained results, authors pointed out the applicability of conventional fracture mechanics in nanoscale components. Meanwhile, the main challenges and difficulties in experimental studies on the fracture behavior of nanoscale materials are demonstrated, and several future research topics are outlined.