Abstract
Effect of adhesion strength on the Bendability was studied in a compositetype vibration-damping steel sheet which consists of two steel skins bonded with a viscoelastic resin. The adhesion strength of the damping sheet was evaluated in tensile shear strength (TSS); TSS values of the damping sheets used for the test were 6, 61, 126 and 148kgf/cm2. U-and 90 deg-bend tests were adopted as bend formability tests.It was found that the bendability of the damping sheet is closely related to their TSS, and it is improved with an increase of TSS. When the TSS is higher than 126kgf/cm2, the bendability of the damping sheet is quite similar to that of conventional steels. On the other hand, when the TSS is as low as 6kgf/cm2, the slip and peel-off between two skins were observed in the bend tests.In the 90 deg-bend test, the damping sheet with TSS of lower than 61 kgf/cm2 bend properties are different from the conventional steel. In large size of bend radius, bend angles of the damping sheet were larger than those of the conventional steel. However, in small size of bend radius, bend angles of the damping sheet were smaller than those of the conventional steel. These behaviors of the damping sheet are based by elastic property of the core resin.
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