감아굽힘 실험장치를 이용한 스프링백 비의 측정

Measurement of Springback Ratio Using Winding Bend Rig

  • 김용우 (순천대학교 공과대학 기계·자동차공학부)
  • 발행 : 2000.04.01

초록

A winding bend rig for measurement of springback ratio is made. It measures the bending angles before and after release of bending load which bends specimens with keeping a constant curvature. Thus the springback ratio can be obtained by using this bend rig. Analytical explanations for the spring back are tried by employing simple beam theory. For the analytical calculations with the theory, Young's modulus, fracture strain and stress-strain curve are necessary and these data are obtained from a tensile test. Using both of the beam theory and the results of tensile test, the springback ratio is also calculated. Comparisons of the two springback ratios, one is obtained from bending test and the other from tensile test, show a good agreement.

키워드