In the present study, closed-cell aluminum foams of varying porosities (65–75%) were produced through the stir casting technique using TiH₂ (1 wt.%) as a foaming agent. Under the uniaxial compressive loading, the compressive stress-strain responses of these foams were examined. The finite element (FE) models of the foam were elaborated using the ABAQUS FE simulation software and realized via the ABAQUS Explicit solver. Within the test domain, the experimental results were compared with the FE-predicted ones for the same porosities and both yielded similar stress-strain responses. The energy absorption capacity, yield stress, and densification strain values of AFs obtained through FE simulation were in good agreement with the experimental results, while the predicted plateau stress values differed from the latter by no more than 4–5%.

中文翻译：

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闭孔泡沫铝压缩变形行为的实验与数值研究

在本研究中，通过使用TiH ₂的搅拌铸造技术生产了不同孔隙率（65–75％）的闭孔铝泡沫（1重量％）作为发泡剂。在单轴压缩载荷下，检查了这些泡沫的压缩应力-应变响应。使用ABAQUS FE模拟软件详细阐述了泡沫的有限元（FE）模型，并通过ABAQUS Explicit求解器实现了该模型。在测试范围内，将相同孔隙率的实验结果与有限元预测的结果进行了比较，并且两者均产生了相似的应力应变响应。通过有限元模拟获得的AF的能量吸收能力，屈服应力和致密化应变值与实验结果非常吻合，而预测的高原应力值与后者的差异不超过4–5％。