2023 Volume 79 Issue 14 Article ID: 22-14002
In the method of bonding steel or FRP plate to recover of the performance of members, the evaluation of debonding of adhesive bonded joints in design and verification is focused. In particular, standards for fatigue design have not established because the data of debonding strength under cyclic stress is scarce. In this study, a specimen was prepared by bonding a steel patch to steel plate using epoxy resin Konishi E258R and E250 observed debonding under cyclic bending stress. The result shows that the fatigue life of adhesively bonded joints can be evaluated in the function of principal stress ratio, the ratio of principal stress range against principal stress at debonding by bending test. Also, the result of bending test and those of tensile test can be seen similar tendency. It was suggested that we can evaluate fatigue durability independent of the working force.
