This paper focuses on the adhesive joints of wind turbine blades and proposes a model for predicting their fatigue life while accounting for the influence of multiple environmental factors. Considering the combined effects of temperature, aging, and salt concentration is a challenging task, and the successful development of a model that integrates all of these elements reflects a high level of research sophistication.The study also presents an innovative approach by noting that fatigue damage accumulates in two stages and introducing a Wiener model to explain this behavior.

On the other hand, some of the photographs and figures appear rather small, and the information provided on the plate materials and adhesives used in the test specimens seems somewhat limited. In particular, although the plates appear to be made of carbon‑fiber‑reinforced plastics, such materials are generally not used for wind turbine blades, which are typically reinforced with glass fibers.

Additionally, the loads acting on actual blades are variable‑amplitude loads, rather than the constant‑amplitude loads considered in this paper. It would be interesting to see whether the proposed model could also be applied under variable‑amplitude loading conditions.

This paper aims to obtain material properties essential for designing the seismic performance of high‑rise buildings. Specifically, it investigates the cyclic behavior of SN490B, a structural steel commonly used as a primary material in tall buildings, through material tests conducted under complex loading conditions. The testing approach employed in this study—multiaxial strain‑controlled experiments using extensometers—is relatively advanced, and the successful implementation of such methods is commendable.
At the same time, the amount of experimental data presented appears somewhat limited. It would be interesting to see whether other major construction materials exhibit cyclic characteristics similar to those of SN490B, and I look forward to future research developments in this area.