起始裂纹在硬区的软对硬力学性能非对称焊接接头，起始裂纹越靠近软区，疲劳裂纹扩展速率越慢；

For CH joint, when the initial crack is located in hard zone, the closer the initial crack is to the hard soft interface, the slower the fatigue crack growth rate is.

youdao

起始裂纹在硬区的软对硬力学性能非对称焊接接头，起始裂纹越靠近软区，疲劳裂纹扩展速率越慢；

For CH joint, when the initial crack is located in hard zone, the closer the initial crack is to the hard soft interface, the slower the fatigue crack growth rate is.

youdao