基于表面纳米化新型吸能结构的设计方法

A new design method of energy absorption structures aid surface self-nanocrystallization

根据局部表面纳米化诱导薄壁管结构的屈曲模态和后屈曲路径方法,提出一种新的吸能结构设计方法。通过优化局部表面纳米化的区域的形状、尺寸和孪晶间距等,实现控制屈曲模式的发展,提高结构的能量吸收和降低最大冲击载荷的目标。结果表明,经优化的局部表面纳米化,不仅可诱导和控制薄壁管稳定渐进紧凑的屈曲模态,而且可以大幅提高薄壁管的吸能效果以及保持原结构的外形。同时也为类似的问题提供一条研究思路。

A new design method of energy absorption structure is presented based on the method of local surfaceself-nanocrystallization inducing buckling modes and postbuckling paths of thin-walled tube structures in this paper. By optimizing the shape , size and twin spacing of the local surface nanocrystallization,the buckling mode of thestructure is controlled in the development process , the energy absorption is improved and the maximum impact loadis reduced. The results show that the method of optimized local surface self-nanocrystallization not only can induceand control steady progressive buckling modes of thin-walled tubes,but also can improve greatly the energy-absorb¬ing properties and keep the shapes of the original structures. At the same time,the method provides a research ideafor similar problems.