Herein, several approaches with the aim of improving the crashworthiness performance of expanded metal tubes were assessed experimentally and numerically. In this regard, various expanded metal tubes were produced out of expanded metal sheets including expanded metal tubes, stiffened expanded metal tubes, foam-filled expanded metal tubes and multi-layered expanded metal tubes. Their crashworthiness performance was evaluated under quasi-static axial compressive loading. The effect of cross-sectional type (square and circular) and cell size (large and small) were also evaluated. Results showed the significant effect of cell size on the crashworthiness performance of expanded metal tubes, while the cross-sectional type had negligible effect. Moreover, the energy absorption properties of expanded metal tubes improved through welding expanded metal sheets in the core (stiffened expanded metal tubes), embedding expanded metal tube in foam, and placing several expanded metal tubes concentrically. Among the studied approaches, the foam-filled expanded metal tubes exhibited the most stable compressive load-displacement response, which is desirable for energy dissipation. Furthermore, the load-displacement responses of prepared expanded metal tubes were also predicted acceptably by the proposed finite element modeling. Finally, the effects of expanded metal tube parameters on the crashworthiness performance of tubes were investigated numerically.

在此，通过实验和数值评估了几种旨在改善金属网管的耐撞性能的方法。在这方面，由膨胀金属板制成各种膨胀金属管，包括膨胀金属管，加强的膨胀金属管，泡沫填充的膨胀金属管和多层膨胀金属管。在准静态轴向压缩载荷下评估了它们的耐撞性能。还评估了横截面类型（正方形和圆形）和像元大小（大和小的）的影响。结果表明，孔尺寸对金属网管的耐撞性能具有显着影响，而截面型的影响可忽略不计。此外，膨胀金属管的能量吸收性能通过将膨胀金属板焊接在芯中（刚性膨胀金属管），将膨胀金属管嵌入泡沫中以及同心放置多个膨胀金属管而得到改善。在研究的方法中，泡沫填充的膨胀金属管表现出最稳定的压缩载荷-位移响应，这对于能量耗散是合乎需要的。此外，所提出的有限元模型还可以预测所制备的膨胀金属管的载荷-位移响应。最后，数值研究了膨胀金属管参数对管的耐撞性能的影响。在研究的方法中，泡沫填充的膨胀金属管表现出最稳定的压缩载荷-位移响应，这对于能量耗散是合乎需要的。此外，所提出的有限元模型还可以预测所制备的膨胀金属管的载荷-位移响应。最后，数值研究了膨胀金属管参数对管的耐撞性能的影响。在研究的方法中，泡沫填充的膨胀金属管表现出最稳定的压缩载荷-位移响应，这对于能量耗散是合乎需要的。此外，所提出的有限元模型还可以预测所制备的膨胀金属管的载荷-位移响应。最后，数值研究了膨胀金属管参数对管的耐撞性能的影响。