For crack-opening displacement tests, a specimen is notched and then fatigued by flexing to obtain a finecrack. 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
Despite the crack-up, Mia's mind is in fine form: she's learned and thoughtful; her head is stuffed with Freud, Hegel, Rilke and Blake.
Amelie: [to her father, who is not paying attention] I had two heart attacks, an abortion, did crack... while I was pregnant. Other than that, I'm fine.