Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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An Improvement of Strain Measuring Technique by using the B-spline Surface Interpolation Method

3차원 곡면 내삽법을 이용한 자동차 박판 부품의 변형율 측정법 개선

  • 김종봉 (한국과학기술원 기계공학과) ;
  • 양동열 (정회원, 한국과학기술원 기계공학과)
  • Published : 1998.07.01
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Abstract

The measurement of strains in stamped sheet metal is essential to the design and manufacture of sound sheet metal products. The measured strains can also be used in verifying the reliability of the computer analysis such as finite element analysis. In most engineering applications, strains are measured from the deformed square grids or deformed circular grids in comparison with the initial undeformed grids. In such a case, however, strains are averaged in each grid and the localized strain in a region smaller than a grid size can not be measured. In the present study, the B-spline surface interpolation technique is introduced in order to measure the strains more exactly and effectively. The strains calculated by using the surface interpolation technique are compared with the strains calculated from the three-noded grids as well as with the finite element analysis.

Keywords

References

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