Bi-tubular corrugated composite conical–cylindrical tube for energy absorption in axial and oblique loading: Analysis and optimization

Abstract

<jats:p> In this paper, a new bi-tubular corrugated composite tube, consisting of inner and outer cylindrical and conical tubes is proposed. Different models with various geometrical parameters including the radius of curvatures and their numbers are considered and studied numerically in axial and oblique crushing in order to achieve favorable crashworthiness parameters. Moreover, quasi-static compression tests have been conducted to obtain results in order to validate the finite element model. There has been a sensible agreement between the numerical results and experimental data. Finite element models are also validated using the analytical solutions for both straight and corrugated composite tubes. Regardless of the number and radius of curvatures, as the crashworthiness of bi-tubular corrugated structures both in axial and oblique crushing is investigated and compared with their single-wall and bi-tubular straight peers, a considerable improvement is achieved in all crashworthiness parameters, including desirable increase in specific energy absorption, favorable reduction in peak force, and consequently a beneficial rise in crushing force efficiency. In addition, an optimization study using a suitable multi-objective function is done to choose the best model among the existing models, in addition to finding an optimum model via genetic algorithm. In the next step, a parametric study is conducted on the best model to inspect how well it undergoes oblique crushing at different angles. Finally, this best model and two other candidates have been chosen to investigate the effect of using foams and then the energy absorption capability of the empty and foam-filled tubes has been compared. </jats:p>

A novel corrugated carbon-fiber composite tube with circular corrugations on the lateral surface for crashworthiness: Manufacturing method, experimental and numerical analysis

“…The material model 'MAT54_ENHANCED_COMPOSITE_DAMAGE', is utilized to model the composite tubes in this study, with the properties of unidirectional T300/PC105 as displayed in Table 2. 34…”

“…[26][27][28][29][30][31][32] In one of the studies, corrugated cylinders were numerically investigated by Mahbod and Asgari, showing better crashworthiness than straight tubes. 33 Sadighi et al 34 researched into the energy absorption capacity of foam-filled bitubular conical-cylindrical tubes, which displayed much higher energy absorption capacity than their bi-tubular straight tubes. Alkhatib et al 35 looked into the crushing response of CFPR and KFRP composite tubes, which were filament-wound on ABS wedge-like corrugated mandrels and failure modes were investigated.…”

Multi-objective optimization of tensile properties of the corrugated composite sheet

“…Also, they created a three-dimensional finite element model based on continuum damage mechanics to estimate the ultimate loadbearing capacity and failure mechanism. Sadighi et al 18 suggested a novel bi-tubular corrugated composite tube composed of inner and outer cylindrical and conical tubes. Several models with varying geometrical dimensions were explored and evaluated numerically in axial and oblique crushing to obtain acceptable crash worthiness parameters.…”

A basic design for automotive crash boxes using an efficient corrugated conical tube

“…17 Also, a new bi-tubular corrugated composite tube, consisting of inner and outer cylindrical and conical tubes is considered and studied numerically in axial and oblique crushing in order to achieve favorable crashworthiness parameters. 18 The crushing behavior of hybrid metal-composite conical tube under dynamic loading is studied by Shiravand and Asgari 19 and a theoretical solution for laminated composite conical tubes is developed.…”