機械的ひずみ計の接着剤による取り付けの研究

抄録

In order to measure the strain on the surface of wide structures with mechanically amplified strain-meters, it was necessary to fix the strain-meter by electric magnet, or suckers made of rubber. It was considered by the authors that the measurement of the strain of wide structures will be simplified if the strain-meter is fixed on the structure by any adhesives. Fifteen sorts of adhesives were put in test to obtain those adhesive tensile strength. Some of adhesives were tested after heat treatment. Tests at high temperatures were also carried out.
For the present purpose in which any heat treatments are not desirable, such adhesive was the most excellent that a nitrate of cellulose was placed between surfaces to be adhered which were coated by a little amount of butyl acetate. The adhesive tensile strength from 18 to 42kg/cm² was attained after one hour drying in room temperature by this adhesive. A satisfactory strain measurement was carried out with the mechanically amplified strain-meter which was fixed with this adhesive.