泡沫铝填充钢铝复合管的静态压缩和吸能特性研究

摘要

A new aluminum foam-filled steel/Al clad tube (Al-FFCT for short) is presented in this paper.The compress and impact process are simulated on platform of ABAQUS with Crushable-foam constitutive model for porous foam material.From the simulation results,the influence of cladding structure on the compression capability and energy absorption of Al-FFCT is discussed.It shows that the Al-FFCT not only has the advantage of utility,buffer and lightweight structure of aluminum foam-filled aluminum tube,but also has the good quality of aluminum foam-filled steel tube that is the smaller displacement of maximum compression and the higher impact energy absorption.And the flexible customization and enhancing performance of compression performance and energy absorption properties can be realized by changing the thickness ratio of steel/Al clad tube.Compression test is carried out and the experimental results are coincident with numerical simulation results.It provides a new approach to design the buffer structure such as vehicle bumper.%提出一种以泡沫铝为填充材料、钢铝复合管为外侧覆层的泡沫铝填充钢铝复合管,并采用多孔泡沫材料Crushable-foam本构模型,在ABAQUS平台上模拟分析了钢铝复合管覆层结构对其压缩变形行为和能量吸收性能的影响规律.结果表明,泡沫铝填充钢铝复合管兼具有泡沫铝填充铝管的效用性、缓冲性、结构轻量化优势,以及泡沫铝填充钢管最大压缩位移小和能承受更高的冲击能量等方面的优势,且通过改变钢铝复合管的层厚比可实现压缩与吸能性能的柔性定制和性能强化,数值模拟结果与实验结果吻合良好,为汽车保险杠等缓冲结构设计提供了新的途径.