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利用实验研究与理论分析相结合的方法研究了泡沫铝填充金属薄壁圆管在准静态侧向压缩下的力学响应.基于能量法,建立了泡沫铝填充圆管和金属薄壁圆管在侧向均匀压缩时的瞬时侧向力、平均侧向力和总吸能的理论公式.对泡沫铝填充管与金属薄壁圆管进行了准静态侧向压缩实验,并且将实验结果与理论公式进行了对比,结果表明理论预测值与实验结果吻合较好.基于建立的理论分析模型,研究了管的几何尺寸以及泡沫铝材料的密度对结构的瞬时侧向力、平均侧向力、总吸能和比吸能的影响.结果表明,在准静态侧向压缩下,泡沫铝填充管的总吸能大于对应的金属薄壁圆管;泡沫铝填充管的侧向压缩力和总吸能随管长度、壁厚和直径的增加而增大;当填充材料泡沫铝密度增大时,填充管的总吸能与侧向压缩力均增加.
The mechanical response of foam-infilled metal thin-walled circular tube under quasi-static lateral compression was studied by means of experimental research and theoretical analysis.Based on the energy method, the foam aluminum filled circular tube and metal thin-walled circular tube were uniformly compressed in the lateral direction The theoretical formulas of instantaneous lateral force, average lateral force and total energy absorption were obtained.The quasi-static lateral compression experiments of foamed aluminum filled tube and metal thin-walled circular tube were carried out, and the experimental results were compared with the theoretical formula. The results show that the theory The predicted values are in good agreement with the experimental results.Based on the established theoretical analysis model, the effects of tube geometry and the density of aluminum foam on instantaneous lateral force, average lateral force, total energy absorption and specific energy absorption of the structure The results show that under quasi-static lateral compression, the total energy absorption of foamed aluminum filled tube is larger than that of the corresponding metal thin-walled circular tube. The lateral compressive force and total energy absorption of foamed aluminum filled tube increase with the increase of tube length, wall thickness and diameter While the total energy absorption and lateral compressive force of filled tube increased when the density of foam aluminum increased.