Loading test tool, testing machine and testing method

The invention belongs to the technical field of composite material tests, and discloses a loading test tool, a test machine and a test method. The loading test tool can be used for loading an L-shaped composite workpiece, and specifically comprises an angle adjusting mechanism and a loading mechanism, the angle adjusting mechanism is configured to enable one end face of the L-shaped composite workpiece to form a preset angle phi with the horizontal plane; the other end of the L-shaped composite workpiece can abut against the loading mechanism, the loading mechanism can apply a vertically upward tensile force P to the other end of the L-shaped composite workpiece, the tensile force P is a resultant force P0 of a tensile force FX and a shear force FY of the L-shaped composite workpiece, and the preset angle phi is equal to an included angle between the direction of the resultant force P0 and the direction of the tensile force FX; the testing machine comprises the loading test tool. The testing method is based o