Quasi-static axial crushing experiment study of foam-filled CFRP and aluminum alloy thin-walled structures

Gan, Nianfei; Feng, Yanan; Yin, Hanfeng; Wen, Guilin; Wang, Duohua; Huang, Xiucheng

doi:10.1016/j.compstruct.2016.08.043

Cited by 63 publications

(12 citation statements)

References 51 publications

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“…Specific energy absorption has an increase about 20-22%. These increase in load efficiency and specific energy absorption due to foam-filling structures were reported by some researchers [39,40,46,56,57]. Furthermore, the value of performance function for foam filled crash box is much higher than empty one that shows better performance of foam filled than empty ones.…”

Section: Resultssupporting

confidence: 61%

“…ρ is density, E11 and E22 are moduli of elasticity along fibre direction and perpendicular to the fibre direction, G12 and According to Figure 2, the sample is located between two rigid plates. The bottom plate is tied to the sample and completely fixed and the other one impacts the sample with velocity of 0.5 mm/min [40] in the axial direction. It is tried to implement the real boundary conditions in the simulation as it occurs in the experimental fixtures.…”

Section: Finite Element Modeling Validation Geometry Materials and Smentioning

confidence: 99%

“…They proved its superiority with respect to the uniform honeycomb filled box structures. Gan et al [40] investigated the collapse behaviour and energy absorption of cylindrical, hexagonal and square hollow thin-walled structures of CFRP composite and aluminium. They also investigated Aluminium and polyurethane foam-filled structures under axial quasi-static compressive load and indicated that cylindrical composite structure filled with polyurethane foam had higher energy absorption capability than, hexagonal and square sections.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Geometry, Triggering and Foam-Filling on Crashworthiness Behaviour of a Cylindrical Composite Crash Box

Jahani¹,

Beheshti²,

Heidari-Rarani³

2019

IJAME

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Crash boxes play an important role in different industries as energy absorbers to reduce damage of accidents. An ideal crash box has lower maximum force and higher energy absorption. The aim of this study is to investigate the effect of various parameters such as geometry (diameter and thickness), triggering and filling with polymeric foam on axial crash behaviour of a composite cylindrical cash box. To this end, a composite crash box is modelled in a commercial finite element software, Abaqus, utilising the Hashin failure criterion to predict damage initiation. Linking damage initiation with material degradation rules provides the capability for damage evolution prediction on the basis of fracture energy of different failure modes. A new parameter (β) is defined to study the performance of a crash box with different geometries, triggers and foam-filling. The results show that three different triggering geometries (chamfer, fillet, and tulip) decrease the maximum load about 7-33%, and improved energy absorption about 40-86% compared to the crash box without trigger. Filling a triggered crash box with polymeric foam also improves energy absorption about 20%. Applying both triggering and foam-filling simultaneously on a crash box has a complementary role to receive a better performance.

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Section: Resultssupporting

confidence: 61%

Section: Finite Element Modeling Validation Geometry Materials and Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Geometry, Triggering and Foam-Filling on Crashworthiness Behaviour of a Cylindrical Composite Crash Box

Jahani¹,

Beheshti²,

Heidari-Rarani³

2019

IJAME

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“…Among composite materials, carbon-reinforced composite tubes are considered as substantially efficient energy-absorbing components that have widely applied in the automotive and aerospace industry. Their crashworthiness behavior has been the subject of several studies in recent years [12][13][14]. A large number of experimental and numerical studies have been conducted to gain a better understanding of the failure mechanism of composite tubes [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A Study of Multi-Objective Crashworthiness Optimization of the Thin-Walled Composite Tube under Axial Load

Seyedi

Khalkhali

2020

Vehicles

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In recent decades, thin-walled composite components have been widely used in the automotive industry due to their high specific energy absorption. A large number of experimental and numerical studies have been conducted to characterize the energy absorption mechanism and failure criteria for different composite tubes. Their results indicate that the energy absorption characteristics depend highly on the failure modes that occur during the impact. And failure mechanism is dependent on fiber material, matrix material, fiber angle, the layout of the fibers, as well as the geometry of structure and load condition. In this paper, first, the finite element (FE) model of the CFRP tube was developed using the Tsai-Wu failure criterion to model the crush characteristics. The FE results were validated using the published experimental. Then, a series of FE simulations were conducted considering different fiber directions and the number of layers to generate enough data for constructing the GMDH-type neural network. The polynomial expression of the three outputs (energy absorption, maximum force, and critical buckling force) was extracted using the GMDH algorithm and was used to perform the Pareto-based multi-objective optimizations. Finally, the failure mechanism of the optimum design point was simulated in LS-DYNA. The main contribution of this study was to successfully model the CFRP tube and damage mechanism using appropriate material constitutive model’s parameters and present the multi-objective method to find the optimum crashworthy design of the CFRP tube.

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“…Although using materials with high plasticity and deformation (e.g. honeycomb grids and metal) could absorb greater energy, they could not be recycled [8,9].…”

Section: Introductionmentioning

confidence: 99%

Spacer fabric/flexible polyurethane foam composite sandwiches: Structural design and quasi-static compressive, bursting and dynamic impact performances

Wang

et al. 2019

Jnl of Sandwich Structures & Materials

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Nylon fabrics are used as the reinforcing upper layer. A warp-knitted spacer fabric that is saturated with flexible polyurethane foam is used as the lower layer. They are combined in order to form innovative impact energy absorbent composite sandwiches employing a two-step foam process. The quasi-static compressive strength, bursting strength, and dynamic shock cushioning characteristic of the composite sandwiches are evaluated, the latter of which is tested using a drop weight impact tester in order to simulate the impact resistance corresponding to complex environments. The experimental results suggest that a combination of warp-knitted spacer fabric increases the compressive strength and bursting strength of composite sandwiches by 107% and 60%, respectively. The shapes of impactors determine the contact force and dynamic impact time. The greater contact area results in the smaller contact force, indicating that the composite sandwiches have greater cushioning efficacy. Designed with a gradient combination, the flexible polyurethane foam strongly bonds the upper polyamide nonwoven fabric and the lower warp-knitted spacer fabric. The optimal compression resistance, a bursting strength of 1677 N, and a maximum energy absorption of 90% at a 15 J impact energy are presented. The innovative composite sandwiches have a promising perspective in packaging and individual impact protection in the future.

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Quasi-static axial crushing experiment study of foam-filled CFRP and aluminum alloy thin-walled structures

Cited by 63 publications

References 51 publications

Effects of Geometry, Triggering and Foam-Filling on Crashworthiness Behaviour of a Cylindrical Composite Crash Box

Effects of Geometry, Triggering and Foam-Filling on Crashworthiness Behaviour of a Cylindrical Composite Crash Box

A Study of Multi-Objective Crashworthiness Optimization of the Thin-Walled Composite Tube under Axial Load

Spacer fabric/flexible polyurethane foam composite sandwiches: Structural design and quasi-static compressive, bursting and dynamic impact performances

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