Experimental and numerical analyses of bending of foam-filled sections
Experimental and numerical analyses of bending of foam-filled sections
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DOI：
10.1007/bf01183678
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发表时间：
2001-03
期刊：
影响因子：
2.7
通讯作者：
S. Santosa;J. Banhart;T. Wierzbicki
中科院分区：
文献类型：
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作者：
S. Santosa;J. Banhart;T. Wierzbicki
通过数值模拟和实验研究了闭孔泡沫铝填充薄壁柱的弯曲挤压行为。使用非线性动态有限元代码来模拟准静态三点弯曲实验。泡沫铝填料通过阻止压缩凸缘处的向内折叠形成而提供更高的抗弯性。此外，泡沫填料的存在将压碎模式从单一静止折叠改变为多重传播折叠。渐进式挤压可防止因截面倒塌而导致承载能力下降。今后，泡沫铝填充对于避免承受弯曲和轴向挤压组合的部件的整体失效非常有吸引力。这种现象是从实验和数值模拟中捕捉到的。结果发现，部分泡沫填充的梁仍然具有高抗弯性，并且开发了有效泡沫长度的概念。提出了泡沫填充部分在防撞结构中的潜在应用。
Numerical simulations and experiments are conducted to study the bending crush behavior of thin-walled columns filled with closed-cell aluminum foam. A nonlinear dynamic finite element code was used to simulate quasi-static three point bending experiments. The aluminum foam filler provides a higher bending resistance by retarding inward fold formation at the compression flange Moreover, the presence of the foam filler changes the crushing mode from a single stationary fold to a multiple propagating fold. The progressive crush prevents the drop in load carrying capacity due to sectional collapse. Henceforth, the aluminum foam filling is very attractive to avoid global failure for a component which undergoes combined bending and axial crushing. This phenomenon is captured from both experiment and numerical simulation. It was found that partially foam-filled beams also still offer, high bending resistance, and the concept of the effective foam length is developed. Potential applications of foam-filled sections for crashworthy structures are suggested.