Method for measuring elasticity modulus of opening expansion ring

The invention relates to a method for measuring the elasticity modulus of an opening expansion ring. The method comprises the following steps: preparing a mold, mounting the mold and the opening expansion ring on an electronic tensile testing machine, and applying uniform and constant pressure to the opening expansion ring through the electronic tensile testing machine; recording the outer diameter of the opening expansion ring when the opening end is closed, the size value after the opening end is reset and the last-time output pressure of the electronic tensile testing machine; establishingan empirical calculation formula by multiple times of experiments and calculating the elasticity modulus of the opening expansion ring. Through the adoption of the technical scheme of the invention, compared with the conventional method for measuring by using grade weights, the method has the following advantages: the output pressure of the electronic tensile testing machine maintains constant anduniform, the labor intens