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Wave propagation Analysis by Finite Element method for Flaw Sizing of Circular Pipes

Shan Lin, Koichiro Kawashima, Toshihiro Ito
Nagoya Institute of Technology, JAPAN,
Hisashi Nagamizo
Mitsubishi Chemical Co., JAPAN
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ABSTRACT

INTRODUCTION

ANALYZED METHOD

NUMERICAL PROCEDURE

NUMERICAL RESULTS AND DISCUSSIONS

Fig 5: Propagation path according to ray theory. Fig 6: Amplitude distribution over cross section A (Amplitude=).

CONCLUSIONS

REFERENCES

  1. I.A.Viktorov, Rayleigh and Lamb Waves, Plenum press, (1967).
  2. M.G. Silk et al, The propagation in metal tubing of ultrasonic wave modes equivalent to Lamb waves, Ultrasonics, Vol.17, p.11, (1979).
  3. D.N.Alleyne et al: Long Range Propagation of Lamb Wave in Chemical Plant Pipe work, Material Evaluation, 55, p.504, (1997).
  4. M.J.S.Lowe et al: Defect Detection in Pipes Using Guide Waves, Ultrasonics, 36, p.147, (1998)
  5. J.Krautkramer et al, Ultrasonic testing of materials, 4th Edition, Springer, p.410, (1990)
  6. B.A.Auld: Acoustic Fields and Waves in Solids, John Wiley Sons Inc., (1973).
  7. K.Kawashima et al: Finite Element Simulation of Leaky Surface Wave Propagation Excited by a Line- Focused Transducer, Review of Progress in Quantitative Nondestructive Evaluation, Vol.17,p.995, (1998).

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