電磁超音波素子による薄板の応力測定

概要

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The magnitude and direction of uniaxial tensile stresses in thin plates were measured using SH_0 waves exited by an electromagnetic transducer with periodic permanent magnet array. Analyzing the measured velocity anisotropy of SH_0 waves, we can separate the difference of principal stresses from the texture-induced anisotropy. In this case, knowledge of the stress-free state is unnecessary. This technique also makes it possible to estimate the principal direction, even when it doesnot coincide with the rolling direction. We tested specimens made of alluminum alloy, stainless steel, and mild steel. We were successful in obtaining stress measurements with sufficient accuracy for alluminum-alloy and stainlesssteel specimens. However, stress measurement was difficult for mild steel in which residual magnetization was present.
一般社団法人日本機械学会の論文
1989-10-25