A loading device is provided, including a first member, a second member, a first clamping member, a second clamping member, and an actuator. The first member includes a first surface, where the first surface contacts a first side of a test piece. The second member includes a second surface, for contacting a second side of the test piece. The first clamping member includes a first clamping surface for contacting the second side of the test piece. The second clamping member is fixedly secured to the second member. The actuator exerts a predetermined force driving the second member in a first direction away from the first member, and a second direction towards the first member.