泡沫金属填充圆管横向线载荷作用下的压入分析  

INDENTATION ANALYSIS OF METALLIC FOAM-FILLED CYLINDRICAL PIPE UNDER TRANSVERSELY LINEAR LOADING

作　　者：谢中友[1,2] 虞吉林[1] 郑志军[1] 

机构地区：[1]中国科学技术大学中科院材料力学行为和设计重点实验室,合肥230027 [2]铜陵学院土木建筑系,铜陵244000

出　　处：《工程力学》2011年第8期248-251,256,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(90916026;11002140;10672156);铜陵学院院级科研项目(2010tlxy02)

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。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 Wiet＇zbieki 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.

关 键 词：复合结构 泡沫金属 虚功率原理 圆管 压入 

分 类 号：O341[理学—固体力学]