I have experiment by using strain gages series which mounted along crack path propagation direction, I can find exactly the initatial time of crack but not know how to find arrest time of crack. Crack tip stops between 2 strain gages and the signal of them can be got. Following is the Figure of strain gage mounted on specimen.
| Attachment | Size |
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| DO AN TCTC_TA.rar_.txt | 216.14 KB |
| DA KY THUAT THI CONG.rar_.txt | 25.65 MB |