PC/ABS合膠材料應用於汽車外覆件之抗擠壓特性及垂直結構補強成效分析

The Analysis for the Tensile Strength and the Vertical Structure Reinforcement of PC/ABS Blend Materials Used as Automotive Skin Panels

官己棟(Chi-Tung Kuan)

指導教授 ： 鍾文仁

中原大學/工學院/機械工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200901419

摘要

PC/ABS合膠材料具有質量輕、耐熱性與耐衝擊性佳等優點，已廣泛地應用於汽車、電子科技及國防工業等方面。將此類型合膠材料製成蜂巢狀結構，應用於汽車外覆件上，利用上述優點，可減少汽車外覆件整體重量，進而達到節能省碳之目的。
PC/ABS合膠材料輔以蜂巢狀結構實施補強後，除可承受較高靜力載重外，亦可承受較高機械運轉震動及外界施加作用力，本研究藉改變蜂巢結構形狀尺寸與高度，以CATIA軟體之整合結構分析模組(Generative Structure Analysis)運用有限元素方式進行應力-應變分析；定義不同的蜂巢結構參數，針對蜂巢結構承受靜力負荷後結構所產生的結構變形量進行分析，結果顯示影響蜂巢結構承受負荷的最大因素是蜂巢結構的高度，蜂巢結構高度的增加，可減少受力後的結構變形量；相較於未做任何結構補強的PC/ABS合膠材料，發現板厚需增加3倍才可達到相同強度。
本研究結果發現，將PC/ABS合膠材料結合蜂巢結構進行結構垂直方向強化，來取代傳統金屬鋼板製品應用於汽車外覆件上是可行的。本文提出的蜂巢結構厚度0.7mm、蜂巢結構平行寬度、蜂巢結構高度與承受不同靜力負荷後所產生的結構變形量，經與汽車外覆件常用板厚0.7mm SPCD鋼板為基準做比較，獲得在不同結構寬度所需對應的結構高度間的關係，可作為外覆件結構工程設計上之參考。

關鍵字

有限元素法 ； CATIA ； 蜂巢結構 ； PC/ABS合膠

並列摘要

PC/ABS (Polycarbonate/Acrylonitrile Butadiene Styrene Copolymer) blend material, with advantages of light-weight and good sustenance under both heat and impact, has been widely applied in automobile, electronic technology, and defense industries. In this thesis, the study focuses on the application of the PC/ABS hive structure in building automobiles. Such PC/ABS hive structure can further reduce total construction weight of automobile to save energy.
In this study, the CAD tool CATIA is applied to help the numerical analysis. The module Generative Structure Analysis of CATIA uses the finite element method to analyze static load of the PC/ABS hive structures with different hive sizes and heights. It turns out that the most important factor affects static load of the hive structure is the dimension of height: Increasing the height of the hive structure can obviously reduce the displacement of the structure under static load. Comparing with PC/ABS blend material structured as hives, the bare PC/ABS blend material needs three times height to achieve the same result in displacement.
This study concludes that it is workable to replace the traditional metal panel used for Body In White in automobile by applying the PC/ABS blend material structured as hives plus vertically structural reinforcement for ejection forming. Furthermore, this study compares the hive structure with the popular 0.7 mm thick SPCD panel in automobile and shows the optimized width and height. The research also provides the static load analysis under different hive structures and could be helpful for designing Body In White.

並列關鍵字

PC/ABS blend ； CATIA. ； FEM ； Hive structure

參考文獻

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