Meanwhile, with the increase of original crack length, the bearing capacity of pipeline is degraded.

裂纹原始长度越大，管道承载能力越低。

youdao

The results show that the original crack is brought by high welding heat, which can cause the broken of ball valve.

结果表明，焊接时输入热量过高产生的原始裂纹是球阀断裂的主要原因。

youdao

The original crack is connected at sensitive place where the crystal is thick and the structure is transformative, and then finally causes broken.

原始裂纹在晶粒粗大及组织变形等敏感处相互连接扩展，最终导致断裂。

youdao

The polymers return to a pre-defined shape when heated to a certain temperature, and, when damage is detected, an infrared laser sends light through the network to the damaged area, triggers the shape-memory, and commands the area to repair the crack or tear -- regaining up to 96 percent of its original strength.

ENGADGET: Shape-memory polymer knows when it's hurt, fixes itself