In-situ monitoring system for crack length of compact tensile sample in harsh corrosive environment

The utility model relates to the field of crack propagation tests of stress corrosion, corrosion fatigue, fracture toughness and the like, in particular to an in-situ monitoring system for the crack length of a compact tensile sample in a severe corrosion environment. The short edges of the two T-shaped connecting assemblies are fixed to the two sides of a central crack opening of a CT sample, the heads of the long edges of the T-shaped connecting assemblies are inserted into through holes in one side of the steering square block, the separated ohm clamp on the other side of the steering square block clamps the displacement transmission rod, and the upper end of the displacement transmission rod is in threaded connection with the induction iron core to be inserted into an LVDT on a high-temperature and high-pressure kettle cover. A spacer bush is connected to the high-temperature and high-pressure kettle cover in a hard sealing mode through threads, a water-cooled jacket is arranged on the outer side of the s