Experiment and Analysis Verification of Shearing Fracture Characteristic of Tapered Double Cantilever Beam with Aluminum Foam

다국어 초록 (Multilingual Abstract)

In this study, mode II(sliding) adhesive strengths of tapered double-cantilever beam (TDCB) specimens of aluminum foams bonded with adhesives were evaluated by finite element analysis. Models were fabricated for testing, and their length and thickness were 200 mm and 25 mm, respectively, while the angles between the adhesive layers and the horizontal direction for models (a), (b), and (c) were 8o, 10o, and 12o, respectively. The joint adhesive method was applied to the models that were made of Al-SAF40, aluminum foam. To generate the crack in shear direction, one end of the loaded block was restrained with a frictionless support while the other end of the loaded block was set to be displaced at the rate of 10 mm/min in the adhesive layer. The analysis and comparison result between the 3 different models revealed that the larger the tilt angle θ of sliding mode was, the larger the maximum load became, while the time to reach the maximum load and the time taken until the load disappeared were shorter as the value increased in the displacement-force reaction curve. This study can be applied to real structures with tapered contact surfaces by analyzing fracture behaviors and characteristics of composite materials such as aluminum foams bonded with adhesives.

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