溶接残留応力測定への音弾性法の適用と疲労き裂進展の評価

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  • Application of an acoustoelastic technique to welding residual stress measurements and evaluation of fatigue crack growth.
  • ヨウセツ ザンリュウ オウリョク ソクテイ ヘ ノ オンダンセイホウ ノ テキ

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An acoustoelastic technique using ultrasonic was applied to nondestructive measurements of welding residual stress. Redistributions of the residual stresses in weld joint CT specimens were measured by the acoustoelastic and strain gauge techniques in fatigue crack growth tests. The redistributions of the residual stresses due to saw-cuts were also measured. The acoustoelastic technique is able to successfully measure the redistributions of the residual stresses. The validity of the principle of superposition is confirmed by the measurements of the redistributions of the residual stresses.

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