| URN | etd-0107114-002252 | Statistics | This thesis had been viewed 646 times. Download 3 times. |
| Author | Chang-Hung Kao | ||
| Author's Email Address | No Public. | ||
| Department | Institute Of Mechanical Engineering | ||
| Year | 2013 | Semester | 1 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 64 |
| Title | Drop Simulation Analysis of a Handheld Electronic Device | ||
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| Abstract | Consumer electronics has experienced a tremendous growth in recent years. Smart phones, digital cameras, laptop computers and tablet electronic browsers are everywhere in our daily life, and an accidental drop of these devices can cause a serious consequence even failures on the devices. This research investigates the impact of simulated drops of a handheld electronic device to the integrity of the product by using finite element analysis software. The simulation results may provide useful information to the product designer to improve the reliability of the devices. A 4.3-inch, touch-screen cellular phone is studied in this research. A commercial product was dismantled and the sizes of its parts were measured using an optical measurement apparatus. Three dimensional models of these parts were created using the CAD software SolidWorks, with appropriate simplifications and modifications. After the 3D model of the cellphone was reassembled, the finite element package ANSYS Workbench was utilized to perform a modal analysis and, as a preprocessor, to build the finite element model for drop simulations, which employed LS-DYNA as a solver. To simulate a realistic drop test on the handheld device, the material properties of the parts, contact behaviors between parts, and the boundary and initial conditions have to be properly established, and the simulated results have to be carefully examined to ensure their credibility. Finally, the weaker portions of the CAD model were modified based on the severity of the damages after the drop simulation. Then, the modified models were brought to simulation again and, based on the outcomes of the calculation, the design alterations were compared and discussed. |
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| Files | indicate in-campus access at one year and off-campus not accessible | ||
| Date of Defense | 2013-11-27 | Date of Submission | 2014-01-21 |