【摘要】 泡沫金属填充薄壁圆管结构越来越广泛地应用于各种工程结构。压入是这种复合结构在侧向承载时出现的一种重要的变形模式,但尚缺乏有效的理论分析模型。该文在Wierzbicki等提出的空管侧向压入的理论模型的基础上,建立了泡沫金属填充薄壁圆管侧向压入的理论分析模型,给出了压头载荷的解析表达式。通过实验比较表明,理论预测值合理地吻合于实验结果。另外,对加载过程中变形区域的演化、结构各组成部分的能量耗散特点进行了分析。更多还原

【Abstract】 Thin-walled structures filled with metallic foam are more and more widely applied in engineering structures.Indentation is an important deformation mode for the structures in application,but no theoretical models have been addressed.Based on the theoretical model of lateral indentation of hollow pipe presented by Wierzbicki et al.,an analytical model of lateral indentation of pipes filled with foam is established in this paper,and load-bearing expression of indenter is presented.The theoretical results agree with those from the experiment.Finally,variation of the length of deforming zone and energy dissipation ratios of components of the foam-filled pipes in the loading process are also analyzed.更多还原