CAJ | 학술논문

采用有限元法分析铝金属空心球型闭孔泡沫材料的动态力学性能，研究了冲击速度、相对密度、基体材料的应变强化以及功能梯度对泡沫材料的平台应力和密实化应变能的影响。结果表明：泡沫材料的平台应力和密实化应变能均随着冲击速度、相对密度和应变强化的增加而增强；功能梯度模型在能量吸收方面表现出明显的优越性，即密度最大的一层作为冲击端、密度最小的一层作为固定端的梯度配置泡沫模型的能量吸收最大。
채용유한원법분석려금속공심구형폐공포말재료적동태역학성능，연구료충격속도、상대밀도、기체재료적응변강화이급공능제도대포말재료적평태응력화밀실화응변능적영향。결과표명：포말재료적평태응력화밀실화응변능균수착충격속도、상대밀도화응변강화적증가이증강；공능제도모형재능량흡수방면표현출명현적우월성，즉밀도최대적일층작위충격단、밀도최소적일층작위고정단적제도배치포말모형적능량흡수최대。
With the finite element method employed, it analyzes the dynamic mechanical property of aluminium metal hollow spherical foam material, and it discussses the impact of crushing velocity, relative density, strain strengthening and function gradient on the plateau stress and the densification strain energy of the foam material. The findings show that the plateau stress and the densification strain energy will be increasing with the strengthening of crushing velocity, relative density, strain strengthening; the function gradient model shows up obvious superiority in energy absoption, that is, the layer with the biggest density as the first impacted layer and the layer with the least density as the last layer, the most energy will be absorbed by the foam model.