For crack-openingdisplacement tests, a specimen is notched and then fatigued by flexing to obtain a fine crack. Force is then applied until the crack begins to grow.
在裂纹扩展试验中，试样切口后使其弯曲并产生微小裂纹，在试件上继续加力直到裂纹扩大为止。
2
The results show that brittle fracture occurs in matrix and the P-WCMOD(crack mouth openingdisplacement) curve is linear till loading to failure.