In this study, the adhesion strength for different frame materials of handheld products was investigated. To characterize the adhesive strength, a simple model of a cellphone that consists of a glass window attached to body frame using double-sided tape was designed and fabricated. The adhesion strength with different pull out speeds and aging times was measured using a conventional pull out testing method. To investigate the detailed delamination process of the adhesive layer, the digital image correlation technique was applied. Moreover, in recent years, the trend of using metal for a body frame of a cellphone has gradually increased due to the fashion of metal frames. Therefore, two materials for body frames were considered for testing in this study: Aluminum was the representative metal and polycarbonate was the representative conventional material. The results showed that the strain at the interface between the adhesive layer and body frame is higher than that at the interface between adhesive layer and glass window for both cases of aluminum and polycarbonate frames. Moreover, the fracture energy in the aluminum body frame is higher than that in the polycarbonate body frame. In order to validate the experimental results, the cohesive elements in ABAQUS™ were used for the modeling bonding layer. The results showed a good agreement between simulation and experiment.
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Recommended by Associate Editor Jin Weon Kim
Ngoc San Ha graduated from department of Aeronautical Engineering of Ho Chi Minh City University of Technology, Viet Nam, 2008, and got Ph.D. degrees from Department of Advanced Technology Fusion, Konkuk University, Korea, 2014. Currently, he is a Research Professor at the Department of Advanced Technology Fusion, Konkuk University, Korea. His topics of interest primarily focus on bioinspired composite material, structural dynamics of small systems, material characterization, and digital image correlation application.
Thanh Duc Dao graduated from department of Mechanical Engineering of Ho Chi Minh City University of Technology, Viet Nam, 2014, and got Master degree from Department of Advanced Technology Fusion, Konkuk University, Korea, 2016. He was a Research Professor at the Department of Advanced Technology Fusion, Konkuk University, Korea from September 2016 to April 2017. His topics of interest primarily focus on shape memory composite material, space deployable structure, material characterization, and digital image correlation application.
Nam Seo Goo graduated from department of Aeronautics Engineering of Seoul National University with honors in 1990, and earned M.S. and Ph.D. degrees in Aerospace Engineering at the same university in 1992 and 1996, respectively. His Ph.D. was in the structural dynamics of aerospace systems. He is a professor in the Department of Advanced Technology Fusion at Konkuk University, Seoul, Korea. His current research interests are structural dynamics of small systems, smart structures and materials, and opto-mechanics
Soonwan Chung graduated graduated from department of Aeronautics and Aerospace Engineering of Seoul National University in 1995, and earned M.S. and Ph.D. degrees in Aerospace Engineering at the same university in 1997 and 2002, respectively. His Ph.D. was related to the nonlinear continuum damage mechanics combined with parallel computing. He is a principal engineer in Global Technology Center of Samsung Electronics Co., Suwon, Korea. His current research interests are waterproof design, drop reliability and material/process optimization for adhesion enhancement.
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Ha, N.S., Dao, T.D., Goo, N.S. et al. Adhesion strength characterization for different frame materials of handheld products. J Mech Sci Technol 31, 4795–4804 (2017). https://doi.org/10.1007/s12206-017-0927-1
- Adhesion strength
- Cohesive element
- Double-sided tape
- Digital image correlation (DIC)