Experimental study about nano-deformation field near quasi-cleavage crack tip |
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| Authors: | XING Yongming DAI Fulong YANG Wei |
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| Institution: | (1) FML, Department of Engineering Mechanics, Tsinghua University, 100084 Beijing, China;(2) Department of Basic Science, Inner Mongolia Polytechnic University, 010062 Hohhot, China |
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| Abstract: | Using the nano-moiré method, we measure the near tip nanoscopic deformation on the 111] plane of single crystal silicon with
a loaded quasi-cleavage crack running in the 110] direction. The measured strain distribution ahead of the crack tip agrees
with the linear elastic fracture mechanics prediction up to 10 nm from the crack tip. Dislocations of Peierls type are detected
and they extend from the crack tip over a length of hundreds of Burgers vectors. |
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| Keywords: | nano-moiré method brittle materials crack tip Peierls dislocation deformation |
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