現代戰爭中輕兵器有愈趨輕量及高機動性，因此兵器製作的材質則益發重要。本文研究的對象為國造T65K2突擊步槍的彈匣，為要達到輕量及高機動性的目的，使用高分子基複合材是必然的要求。然而使用高分子基複合材是否真能達到如同使用鋁合金材的強度?為要了解其中的差異，在本文中使用電腦軟體ANSYS針對彈匣口部分受力狀況予以分析，分析過程使用兩種模式:1.半彈匣口的有限元素分析2.整體彈匣的有限元素分析。兩種分析模式都分別使用鋁合金及高分子基複合材質模擬彈匣受力狀況，可得到材質楊氏係數和最大位移量比值為1/35且高分子基複合材的彈匣較鋁合金材容易發生子彈鬆脫的狀況。因此如何尋找適當的複合材料則顯得相當重要。理論部分則是電腦軟體ANSYS的控制方程式。

Light weapons are more light capacities and high moblities in the war now,so the quality of weapons is more important.In this article,I study about T65K2 refile's magazine for ligt capacity and high mobility.For this purpose,it needs to use macromolecular compounds' quality.But we may ask if macromolecular compounds' strength is good as aluminum alloy?SO I use two modes to analyse the stress of magazine's entrance by computer software ANSYS.One is half magazine's entrance finite element analysis,and the other is whole magazine finite element analysis.Two modes all use aluminum alloy quality and macromolecular compounds quality.the result shows that the ratio between Young's modulus and maximum displacement is 1/35.The theory is governing equation of computer software ANSYS.

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