中高速弹体侵彻下泡沫铝夹芯结构抗侵彻性能实验研究

发布时间：2018-01-13 00:25

本文关键词：中高速弹体侵彻下泡沫铝夹芯结构抗侵彻性能实验研究　出处：《舰船科学技术》2017年11期 　论文类型：期刊论文

【摘要】：为研究泡沫铝夹芯结构各组成部分在中、高速弹体侵彻下的抗侵彻性能及破坏机理,分别开展泡沫铝芯材(I)、前面板与芯材(II)、芯材与后面板(III)以及泡沫铝夹芯结构(IV)4种靶板在中、高速弹体侵彻下的弹道冲击试验。分析夹芯结构的破坏模式、侵彻过程和抗弹性能。结果表明:在中、高速弹体侵彻下,泡沫铝芯材发生了胞壁的绝热剪切和撕裂破坏,存在前面板的泡沫铝芯材还发生了胞壁压实坍塌;前面板发生绝热剪切破坏,弹速较低时,弹孔周围将产生明显的碟形弯曲变形,板厚较大、弹速较高时弹孔边缘存在开坑唇边;后面板发生了局部碟形弯曲-贯穿破坏,板厚较小时,后面板还产生了花瓣开裂。泡沫铝芯材吸能较小,泡沫铝和面板组成的夹芯结构吸能明显提高。面板的存在提高了靶板的抗弹性能,前面板对靶板的抗弹性能影响大于后面板的影响。同一种形式的靶板在高速弹体侵彻下的抗弹性能明显优于中速弹体侵彻下的抗弹性能。
[Abstract]:In order to study the penetration resistance and failure mechanism of various components of aluminum foam sandwich structure under the penetration of high speed projectile, the foam aluminum core is developed respectively. The ballistic impact tests of four kinds of target plates (core and rear panel III) and foamed aluminum sandwich structure are carried out under the penetration of high speed projectile. The failure mode of sandwich structure is analyzed. The results show that the cell wall adiabatic shear and tear damage of the foamed aluminum core occur under the penetration of the medium and high speed projectile, and the cell wall compaction collapse occurs in the foamed aluminum core material with the front panel. The adiabatic shear failure occurs on the front panel. When the velocity of the projectile is low, there will be obvious disc bending deformation around the hole, the thickness of the plate is larger, and the edge of the hole has an open lip when the velocity of the projectile is high. Local plate bending and penetrating failure occurred in the rear panel, the thickness of the plate was small, the back panel also produced petal cracking, and the energy absorption of the foamed aluminum core was relatively small. The energy absorption of the sandwich structure composed of aluminum foam and panel is obviously improved, and the elastic resistance of the target plate is improved by the existence of the panel. The effect of the front panel on the elastic performance of the target is greater than that on the rear panel, and the same type of target is better than the medium velocity projectile under the penetration of the high speed projectile.
【作者单位】：海军工程大学舰船工程系;
【基金】：国家自然科学基金资助项目(51209211,51479204)
【分类号】：TB383.4;TG146.21
【正文快照】： 泡沫铝材料是一种集物理功能与结构一体化的新型工程材料。由于具有独特的微观结构,泡沫铝材料在压缩的过程中会出现应力平台期(应力基本保持不变,而应变变化很大),因此可以承受较大的塑性变形。泡沫铝材料经常作为吸能构件而广泛地应用于可能遭受弹体侵彻和爆炸冲击的防护工

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