Shape optimization of mobile phone folder module for structural strength

• Published in: Journal of mechanical science and technology Vol. 26; no. 2; pp. 509 - 515
• Main Authors: Lee, Gabseong, Park, Jeongseok, Choi, Dong-Hoon
• Format: Journal Article
• Language: English
• Published: Heidelberg Korean Society of Mechanical Engineers 01.02.2012; Springer Nature B.V; 대한기계학회
• Subjects: Applied sciences; Artificial intelligence; Cell phones; Computer science; control theory; systems; Computer simulation; Control; Dynamical Systems; Engineering; Exact sciences and technology; Finite element method; Fracture mechanics (crack, fatigue, damage...); Fundamental areas of phenomenology (including applications); Industrial and Production Engineering; Mathematical models; Mechanical Engineering; Mechanical engineering. Machine design; Modules; Optimization; Pattern recognition. Digital image processing. Computational geometry; Physics; Shape optimization; Solid mechanics; Static elasticity (thermoelasticity...); Strength; Structural and continuum mechanics; Vibration; 기계공학; PIDO; Morphing; Metamodeling; Shape optimization; Geometrical shape; Mobile phone; Variable geometry; Image morphing; Rupture; Modeling; Geometrical model; Optimization; Engineering design; Finite element method; Performance requirement; Substitute; Metamodel; Assembly; Strength; Structural analysis; Mathematical programming
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-011-1212-3

The mobile phone has become thinner even while its functionalities are ever increasing. Therefore, the importance of structural design to prevent structural failure is of increasing importance. To address this situation, a systematic optimization approach for shape design of a mobile phone folder module is utilized in this research. The structural strength and the exactness of the folder module assembly are considered as performance requirement of the optimization problem. Five shape parameters of the folder module assembly are used as design variables. In this research, the finite element method (FEM) is used to acquire the structural strength of the folder module assembly, and the morphing technique is applied to change the shape of the finite element (FE) model. However, manually performing the morphing and FEM for the simulation model is complex and time consuming especially for a model with complicated shape such as the mobile phone. Therefore, shape optimization involving FEM is known to be very difficult task for actual industrial applications. To overcome this deficiency, two types of approaches are applied in this research. First, process integration and design optimization (PIDO) technology is applied to integrate and automate the analysis processes needed for evaluating structural performances. In addition, a metamodel that can substitute for expensive simulation is employed for the optimization process. From this research, an optimum design for the folder module of a mobile phone enhancing the structural strength is acquired. In addition to the optimum solution, a metamodelbased shape optimization procedure which is applicable to practical engineering problem is established.