半球形金屬彈片應用於行動電話按鍵之非線性分析

The Nonlinear Analysis of Metal Dome For the Mobile Phone Keypad

詹永吉(Yung-Chi Chan)

指導教授 ： 陳政順

國立臺北科技大學/機電學院/製造科技研究所/碩士(2011年)

摘要

本文研究內容將探討行動電話按鍵中，針對半球形金屬彈片及超彈體橡膠，採用Pro/Engineer2.0繪製按鍵結構圖後，結合有限元素分析軟體Ansys進行幾何非線性結構及材料非線性分析，本實驗將不銹鋼合金(SUS 301)材料製成半球形金屬彈片與Silicon Rubber製做成按鍵懸臂結構，橡膠具有不可壓縮性，可在經歷大變形之後能再回復原狀，呈現超彈體特性，為一種材料非線性行為，超彈體橡膠適用Mooney-Rivlin 理論進行探討。最終模擬結果與實驗測試結果比較，利用載重與位移曲線，了解按壓觸感狀態，並檢視半球形金屬彈片的等效彈性應力。

關鍵字

有限元素法 ； 行動電話按鍵 ； 幾何非線性

並列摘要

This research focused on the design of the mobile phone keypad, utilizing a metal dome and hyperelastic rubber. The structure of the keypad was conceived using Pro/ Engineer 2.0, in combination with the Finite Element Analysis Software, Ansys. Both geometric nonlinearity structure and material nonlinearity were analyzed. In this study, the metal dome of the keypad was composed of the stainless steel alloy (SUS 301), and the cantilever button, of silicon rubber. The rubber was incompressible. It was also able to sustain significant deformation and reinstate its original shape, demonstrating characteristic of hyperelasticity consistent with material nonlinear behavior. This was further discussed in the study using the theory of Mooney-Rivlin. Finally, experimental results were compared to simulation results. Load and displacement curve were used to understand the state of key feeling, as well as to check for the equivalent elastic stress of the metal dome.

並列關鍵字

Finite Element Method ； Mobile Phone Keypad ； Geometric Nonlinear

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