金属/复合材料混杂结构压溃变形吸能机制OA

This study investigates the deformation behavior and energy absorption mechanisms of single-component tubes(aluminum alloy,carbon fiber reinforced polymer(CFRP),and aluminum foam)and their hybrid configurations under quasi-static axial loading.Experimental results reveal that the energy absorbed by the hollow aluminum/CFRP hybrid tube and the foam-filled aluminum/CFRP hybrid tube exceeds the sum of their individual components by 2.7%and 31.3%,respectively.To further explore the underlying mechanisms,a user-defined material subroutine(VUMAT)for CFRP was developed,and finite element models for both the single and hybrid tubes were established in ABAQUS.Numerical simulations indicate that,compared to their single-component counterparts,the internal energy of the outer aluminum tube in the hollow hybrid structure increased by 82.2%,while the inner aluminum tube and the middle CFRP tube exhibited changes of+16.8%and-39.4%,respectively.This resulted in a modest overall energy absorption improvement of just 2.7%.Conversely,in the foam-filled hybrid tube,the internal energy of the outer aluminum tube,inner aluminum tube,middle CFRP tube,and aluminum foam filler increased by 92.5%,38.8%,11.3%,and 57.6%,respectively.This led to a substantial overall energy absorption improvement of 31.3%.These findings can provide theoretical guidance and modeling support for the future design optimization of metal/composite hybrid vehicle body structures.