A novel equivalent method for crashworthiness analysis of composite tubes

Song, Zhibo; Ming, Shizhao; Du, Kaifan; Feng, Shaojun; Zhou, Chuanli; Hao, Peng; Xu, Shengli; Wang, Bo

doi:10.1016/j.compositesa.2021.106761

Cited by 11 publications

(5 citation statements)

References 54 publications

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“…3 There have been numerous studies related to CFRP thin-walled tubes, among which three widely reported thinwalled failure modes are progressive bending mode, progressive splaying mode, and buckling failure. [4][5][6][7] It is worth noting that extensive research has demonstrated that the failure mode of thin-walled structures can be guided using special trigger mechanisms. [8][9][10][11][12] Fiber fracture is the most significant characteristic of composite material failure mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…They have been favored by many automotive manufacturers for lightweight vehicle designs 3 . There have been numerous studies related to CFRP thin‐walled tubes, among which three widely reported thin‐walled failure modes are progressive bending mode, progressive splaying mode, and buckling failure 4–7 . It is worth noting that extensive research has demonstrated that the failure mode of thin‐walled structures can be guided using special trigger mechanisms 8–12 …”

Section: Introductionmentioning

confidence: 99%

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Effect of geometric structure and fiber orientation on crashworthiness of honeycomb‐inspired composite thin‐walled tubes

Feng,

Wei,

et al. 2024

Polymer Composites

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This study investigates the crashworthiness of biomimetic composite thin‐walled tubes under quasi‐static axial crushing, focusing on the effects of geometric structure and fiber orientation. The thin‐walled tubes, inspired by honeycomb structures, were manufactured using carbon fiber composites through multi‐cavity preform mold method. Quasi‐static crushing tests and CT scanning observation were conducted to characterize the mechanical response, crashworthiness mechanisms and energy absorption capacity of the thin‐walled tubes. Results demonstrated excellent energy absorption capacities across all configurations, with the C‐0/45 configuration achieving the highest specific energy absorption at 115.03 kJ/kg. The optimal crushing energy absorption process for thin‐walled tubes involves achieving high peak loads and maintaining high load levels. Sustaining high loads requires progressive and stable damage without the formation of extensive intermediate cracks between different plies (indicative of strong interlaminar shear strength). The structural integrity of the uncrushed sections must remain intact without significant damage during the crushing process. Fiber orientation parallel to the loading direction enhances peak load levels and interlaminar shear strength between plies, but may compromise circumferential stiffness and structural stability. The influence of geometric configuration is primarily manifested in the progressive and stable crushing phase, where the tube requires sufficient space to accumulate its own debris without causing damage to the uncrushed thin‐walled structure.Highlights Structures and fiber orientation boost crashworthiness in biomimetic composite tubes. Biomimetic structures were produced using a multi‐cavity preform mold method. CT scans were conducted to characterize the energy absorption mechanisms. Composite tubes demonstrated excellent energy absorption capacity of 115 kJ/kg.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of geometric structure and fiber orientation on crashworthiness of honeycomb‐inspired composite thin‐walled tubes

Feng,

Wei,

et al. 2024

Polymer Composites

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“…[1][2][3][4][5][6][7][8] The crashworthiness of the aircraft is closely related to the design of the composite energy-absorbing structure, which directly affects the safety of the occupants. [9][10][11][12] In collision accidents, the composite structure can dissipate a large amount of impact kinetic energy through complex failure modes such as fiber matrix damage, buckling failure, delamination, and folding. 13,14 To improve the crashworthiness of composite structures, researchers have conducted extensive research on the energy absorption mechanism of composite structures.…”

Section: Introductionmentioning

confidence: 99%

Influence of the bevel and steeple triggers on crashworthiness of carbon fiber-reinforced composite channel section structure

Ren

2023

Journal of Composite Materials

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To induce the progressive crushing of composite channel section structure (CCSS), the bevel and steeple trigger are proposed and designed. A nonlinear damage model considering both damage initiation and evolution of intra-ply and inter-ply is developed. The damage initiation and stiffness degradation processes of intra-ply are predicted by the maximum stress criterion and an exponential evolution law, respectively. The adhesion behavior between adjacent plies is modeled following the surface-based cohesive contact method, and the delamination failure behaviors of inter-ply are predicted using the traction-separation model. The effects of different configurations of bevel and steeple trigger on the energy absorption characteristics of CCSSs subjected to quasi-static axial loading are compared and analyzed. The results show the initial peak load of CCSS using the bevel and steeple trigger has a negative correlation function with the bevel angle. The steeple trigger can induce progressive crushing of the structure and significantly enhance the specific energy absorption (SEA).

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“…However, the computational cost of the stacked-shell models increased significantly after the structural dimensions were enlarged. Recently, Song et al [47] introduced a novel equivalent method for simulating the crashworthiness of CFRP structures. Results show that the computational efficiency can be improved by 62-86% compared to the traditional stacked-shell models.…”

Section: Introductionmentioning

confidence: 99%

On Crashworthiness and Energy-Absorbing Mechanisms of Thick CFRP Structures for Railway Vehicles

Chen

Sun

Li³

et al. 2022

Polymers

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This study aims to provide important guidelines for the crashworthiness design of composite energy-absorbing structures, especially railway vehicles. An experimental and numerical investigation was carried out to explore the crushing response of circular composite tubes reinforced with plain woven carbon fiber-reinforced polymers (CFRP). Quasi-static and dynamic axial crushing tests were performed on CFRP tubes with an inner diameter of 100 mm and a nominal wall thickness of 12 mm. Experimental results showed that increasing loading velocity led to a 21.8% reduction in specific energy absorption (from 99.7 kJ/kg to 78.7 kJ/kg) but had negligible influence on failure modes. Finite element models were also established and validated against the experimental results using ABAQUS/Explicit software. The effects of several different parameters such as the number of shell layers, friction coefficient, and interface properties on the simulated results, were also investigated and analyzed. A small variation in these parameters could change the total energy absorption of CFRP tubes. The comparisons between the predicted and experimental results indicated that a finite element model with 10 shell layers could effectively replicate the crushing response. In addition, the simulated results indicated that the damage of tubal wall materials dominated the major energy-absorbing mechanisms of CFRP tubes under quasi-static loads, which was 69.1% of the total energy. The energy dissipated by friction effects between the loading platen and the crushed fronds was 24.1% of the total energy. The increase in the loading velocity led to a decrease in the composite damage energy except for friction energy, resulting in a decrease in the total energy absorption.

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A novel equivalent method for crashworthiness analysis of composite tubes

Cited by 11 publications

References 54 publications

Effect of geometric structure and fiber orientation on crashworthiness of honeycomb‐inspired composite thin‐walled tubes

Effect of geometric structure and fiber orientation on crashworthiness of honeycomb‐inspired composite thin‐walled tubes

Influence of the bevel and steeple triggers on crashworthiness of carbon fiber-reinforced composite channel section structure

On Crashworthiness and Energy-Absorbing Mechanisms of Thick CFRP Structures for Railway Vehicles

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