Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Phys Rev Lett. 2011 May 20;106(20):204302. doi: 10.1103/PhysRevLett.106.204302.
We present results of a hybrid experimental and theoretical investigation of the fracture scaling in scratch tests and show that scratching is a fracture dominated process. Validated for paraffin wax, cement paste, Jurassic limestone and steel, we derive a model that provides a quantitative means to relate quantities measured in scratch tests to fracture properties of materials at multiple scales. The scalability of scratching for different probes and depths opens new venues towards miniaturization of our technique, to extract fracture properties of materials at even smaller length scales.
我们呈现了对划痕试验中断裂缩放的混合实验和理论研究结果，并表明划痕是一个主要由断裂控制的过程。该研究已经在石蜡、水泥浆、侏罗纪石灰岩和钢上得到了验证，我们推导出了一个模型，该模型为将划痕试验中测量的量与材料在多个尺度上的断裂性能相关联提供了一种定量手段。不同探针和深度的划痕的可扩展性为我们的技术的小型化开辟了新的途径，以在更小的长度尺度上提取材料的断裂性能。
