On axial crushing behavior of double hat-shaped CFRP and GFRP structures

Chen, Dongdong; Sun, Xiaoyu; Xiao, Shoune; Yang, Guangwu; Yang, Bing; Zhu, Tao; Wang, Mingmeng

doi:10.1016/j.compstruct.2023.117117

Cited by 5 publications

(2 citation statements)

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“…1 Yet, this type of damage behaviour remains of interest to academia and industry. [2][3][4][5][6][7] This is due to the high specific energy absorption (SEA) capacities and the complex interaction of mechanisms taking place during this kind of composite failure. [8][9][10] The influencing factors include trigger shape, specimen geometry, stacking sequence, and material properties.…”

Section: Introductionmentioning

confidence: 99%

Dynamic crushing of composite coupons: An experimental and numerical study

Pohl,

Liu,

Thomson

et al. 2023

Journal of Composite Materials

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Dynamic crushing of composites is studied proposing an optimised experimental design: flat, millimetre-scale specimens reduce geometrical influences and facilitate detailed numerical studies. Crushing behaviour is investigated on a universal testing machine and a drop-tower at varying loading rates using two different force measurement techniques. The results show a decrease in the maximum stress and absorbed energy at elevated rates due to a higher extent of delamination, caused by strain-rate-induced increase of intralaminar damage property values. The experiments are simulated in an explicit finite element solver with different through-thickness discretisation, showing that a stacked-laminate model is incapable of reproducing the crushing response at high velocities. However, a discrete-ply model is capable of describing the main failure mechanisms and energy absorption for all loading rates. Further improvement of the model’s predictive capability could be achieved by adding a plasticity formulation in the ply material model.

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Section: Introductionmentioning

confidence: 99%

Dynamic crushing of composite coupons: An experimental and numerical study

Pohl,

Liu,

Thomson

et al. 2023

Journal of Composite Materials

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“…Large-capacity, sacrificial energy absorbers that collapse along their axes, commonly referred to as front and rear rails or crash boxes, are integrated within the frames of all modern vehicles, representing the first line of defense during accidents, collisions and derailments. A multitude of innovations to this technology have been proposed to address the ever-growing challenge of improved occupant safety, including structural discontinuities [ 4 , 5 , 6 ], multi-celled profiles [ 7 , 8 ], origami-type initiators [ 9 , 10 , 11 ], the advent of composite materials [ 12 , 13 , 14 , 15 , 16 , 17 ] and bio-inspired solutions [ 18 , 19 , 20 ], among many others. Accelerating demand for electric road vehicles and high-speed rail systems composed of lightweight materials, with the overarching goals of sustainable manufacturing and consumption practices, has posed many new engineering challenges.…”

Section: Introductionmentioning

confidence: 99%

Influence of Extruded Tubing and Foam-Filler Material Pairing on the Energy Absorption of Composite AA6061/PVC Structures

Magliaro,

Mohammadkhani,

Rahimidehgolan

et al. 2023

Materials

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There is accelerating demand for energy-absorbing structures fabricated from lightweight materials with idealized, near-constant force responses to simultaneously resolve the engineering challenges of vehicle mass reduction and improved occupant safety. A novel compounded energy dissipation system composed of AA6061-T6 and AA6061-T4 tubing subjected to hybrid cutting/clamping and H130, H200 and H250 PVC foam compression was investigated utilizing quasi-static experiments, finite element simulations and theoretical modeling. Identical structures were also subjected to axial crushing to compare with the current state of the art. The novel cutting/foam crushing system exhibited highly stable collapse mechanisms that were uniquely insensitive to the tube/foam material configuration, despite the disparate material properties, and exceeded the energy-absorbing capacity and compressive force efficiency of the axial crushing mode by 14% and 44%, respectively. The simulated deformation profiles and force responses were consistent with the experiments and were predicted with an average error of 12.4%. The validated analytical models identified numerous geometric/material configurations with superior performance for the compounded AA6061/PVC foam cutting/foam crushing system compared to axial crushing. An Ashby plot comparing the newly obtained results to several findings from the open literature highlighted the potential for the compounded cutting/foam crushing system to significantly outperform several alternative lightweight safety systems.

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