本文內容主旨在研究鐵質板件與複合材料受到低速撞擊時的整個受力及能量曲線歷程圖，並討論複材層板代替鐵質板件之可行性。另外並以軟體模擬的方法模擬整個撞擊過程，再將實驗結果與模擬結果做一個互相比較。本文中所用的實驗所使用的鐵質板件與複材層板皆為應用於汽車工業上的外部組件用材料，利用落錘試驗機做一系列的低速撞擊實驗，再使用整個資料擷取系統，可得到不同速度及不同衝擊能量下的力量和能量曲線。在藉由這些曲線圖了解整個材料損傷及能量吸收情形，以作為日後材料選擇時評估防撞性能的依據。

最後，我們使用商用有限動態軟體LS-DYNA 3D，來模擬實際的撞擊情形，再將數據與實際情形作比較，在較低速部分情況下，鐵質試片有些較不錯的結果。

The purpose of this thesis is to study the force and energy curve of steel plate and composite due to low-velocity impact, and discuss the probability using composite to replace steel plate. With using software to simulate complete impact process, than compare the experimental result and simulation result. In this thesis, the steel plate and composite is applicable to the automotive industry .We do a series of low-velocity impact experiment by utilizing the Drop-Weight Tower Tester and the data acquisition system, we can get the impact force and absorbed energy histories in different velocity and different impact energy. We can understand the condition damage and energy absorbed of the specimen by the experimental histories curve, to be the basis of the choice of the materials and the assessment of the ability of impact resistance.
Finally, we use LS-DYNA3D finite element analysis software to simulate the condition of actual impact,then we compare the experimental data and simulate result, there is a good resultant for low-velocity impact testing of steel plate.

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