ls-dyna模擬子彈侵徹復(fù)合裝甲，子彈撞擊陶瓷層后反彈，是什么原因？ 20
小弟現(xiàn)在是在模擬子彈打擊復(fù)合裝甲的過程，裝甲的結(jié)構(gòu)是由陶瓷層、粘貼層和背板組成。最開始，我將子彈的材料定義為*MAT_PLASTIC_KINEMATIC（來源于已有資料），分別改變陶瓷層的厚度，研究子彈的侵徹情況。當(dāng)陶瓷層的厚度增加到一定厚度時(shí)（1.2cm），子彈就會反彈。如下圖，
同時(shí)，小弟在翻看文獻(xiàn)時(shí)，發(fā)現(xiàn)也有人直接將子彈設(shè)為*MAT_RIGID，忽略掉子彈撞擊時(shí)的質(zhì)量損失和變形，于是小弟也試了一下，發(fā)現(xiàn)效果良好，子彈直接擊穿了復(fù)合裝甲。
于是小弟就很好奇，如果是子彈材料設(shè)定的不同引起的結(jié)果，為什么同學(xué)采用*MAT_PLASTIC_KINEMATIC，并沒有出現(xiàn)反彈的現(xiàn)象（他是使用的三層陶瓷復(fù)合，但是總厚度與我相差不遠(yuǎn)），而是一直保持侵徹直至抵達(dá)背板。
附上小弟的k文件：
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