Jianguang Fang

TL;DR: A comprehensive review of the important studies on design optimization for structural crashworthiness and energy absorption is provided in this article, where the authors provide some conclusions and recommendations to enable academia and industry to become more aware of the available capabilities and recent developments in design optimization.

TL;DR: In this paper, a group of multi-cell tubes with different cell numbers were comprehensively investigated under both axial and oblique loads, and the results showed that different loading angles have different requirements on cell allocation and optimizations of multiple load cases can yield better solutions in a weighted average fashion, whereas the optimization for separate single load cases (SLC) could result in inferior performance under other load cases.

TL;DR: In this article, the effects of multi-cell configurations and oblique loads on the crashworthiness performance have been under studied and it is found that for the same cell number, the number of corners plays a significant role in enhancing energy absorption.

TL;DR: In this paper, a functionally graded thickness (FGT) was introduced to multi-cell tubes under dynamic impact, which can be fabricated by an extrusion process and a numerical model was established using the nonlinear finite element analysis code LS-DYNA and validated with experimental data.

TL;DR: In this article, the authors incorporated the concept of hierarchy into honeycomb structures for enhancing their crashworthiness performance by replacing every vertex of a regular hexagonal network with a smaller hexagon topology and repeating this process for constructing fractal-appearing honeycombs with higher order of structural hierarchy.