Abstract

The main purpose of this work is to investigate the yield criterion and dynamic response of fully clamped slender rectangular sandwich tubes with metal foam core struck by a low-velocity heavy mass. A plastic yield criterion is proposed for the rectangular sandwich tubes with metal foam core. Using the yield criterion, analytical solutions are derived for the dynamic response of fully clamped slender rectangular sandwich tubes with metal foam core struck by a low-velocity heavy mass, in which the foam core strength effect and the interaction of bending and stretching are considered. Numerical calculations are carried out to predict the dynamic response of the rectangular sandwich tubes under low-velocity impact. The analytical model captures the numerical results reasonably. The effects of foam core strength and wall thickness of tube on the dynamic response are discussed in detail. It is shown that the present analytical model can reasonably predict the dynamic response of the rectangular sandwich tube with metal foam core under the low-velocity impact.

摘要

这项工作的主要目的是研究具有金属泡沫芯的全夹紧细长矩形夹层管被低速重物撞击的屈服准则和动态响应。提出了金属泡沫芯矩形夹层管的塑性屈服准则。使用屈服准则，推导出全夹紧细长矩形夹层管被低速重质量撞击的泡沫金属芯的动态响应的解析解，其中考虑了泡沫芯强度效应和弯曲和拉伸的相互作用。数值计算用于预测矩形夹层管在低速冲击下的动态响应。解析模型合理地捕捉了数值结果。详细讨论了泡沫芯强度和管壁厚度对动态响应的影响。结果表明，该分析模型可以合理地预测泡沫金属芯矩形夹层管在低速冲击下的动态响应。