Two-way stretching cross-shaped sample and manufacturing method thereof

The invention discloses a two-way stretching cross-shaped sample which comprises a circular test area, four clamping arms evenly distributed around the test area and a transfer area connecting the test area with the four clamping arms, and the transfer area comprises a conical thinning area surrounding the test area and connecting arms between the clamping arms and the conical thinning area. Each connecting arm is provided with a plurality of long-strip-shaped hollowed-out notches which are formed in the length direction of the connecting arm and arranged in the width direction of the connecting arm, the hollowed-out notches are symmetrical about the center line of the connecting arm, and the hollowed-out notches are sequentially shortened from the center line of the connecting arm to the edge of the connecting arm. The invention provides a sample manufacturing method. According to the invention, a plurality of structural parameters and a processing method of the cross-shaped sample are improved, and the cros