但是，声发射信号的起始点并不是主裂纹起裂点，失稳前阶段也不能与亚临界扩展阶段等同。

But the beginning of the acoustic emission sign is not the cracking point of main crack, and the preinstability stage may not be equal to the subcritical growth stage.

youdao

但是，声发射信号的起始点并不是主裂纹起裂点，失稳前阶段也不能与亚临界扩展阶段等同。

But the beginning of the acoustic emission sign is not the cracking point of main crack, and the preinstability stage may not be equal to the subcritical growth stage.

youdao