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。

For crack-opening displacement 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.

youdao

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。

For crack-opening displacement 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.

youdao