Shear fatigue test piece

The utility model belongs to the field of airplane fatigue strength tests. The shear fatigue test piece comprises a test piece assessment section (1-1), a stringer and skin connecting section (1-2) and a test piece transition section (1-3), a clamping section (1-4) is an extension section of the test piece transition section (1-3) and is used for being connected with a clamp in the test process, and the thickness of the test piece assessment section (1-1) is the same as the actual thickness of an airplane real structure; the stringer and skin connecting section (1-2) is connected with the assessment section (1-1) through rivets, and the clamping section (1-4) is in equal-thickness transition with the assessment section (1-1). According to the test piece, the loading center can pass throughthe centroid of the test piece assessment section, the test piece is prevented from being bent, the purposes that the test result is real and credible and the test risk is reduced can be achieved without additionally designi