A numerical study on the axial crushing response of hybrid pultruded and ±45° braided tubes

Han, Haipeng; Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬, Farid; Pegg, Neil; You, Lijun

doi:10.1016/j.compstruct.2006.05.012

Cited by 77 publications

(39 citation statements)

References 21 publications

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“…The 45-degree chamfer is modeled as a single row of reduced thickness 0.25 mm elements at the crush front of the specimen. The card * PART_COMPOSITE is used to define the 16 layers of composite sinusoidal specimen, and the finite element model is adopted the material model of MAT 54_Enhanced_Composite_Damage, which used the Chang-Chang failure criterion in the LS-DYNA theoretical manual (Han, 2007;LSTC, 2012). The material card of MAT 54 contains input parameters for both material physical properties of T700/3234 (Table 1) and other code-specific parameters (Table 2) ( Paolo, 2011;LSTC, 2012).…”

Section: Finite Element Modelmentioning

confidence: 99%

Crashworthiness Analysis and Evaluation of Fuselage Section with Sub-floor Composite Sinusoidal Specimens

Mou

Zou

Feng

et al. 2016

Lat. Am. j. solids struct.

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Crashworthiness is one of the main concerns in civil aviation safety particularly with regard to the increasing ratio of carbon fiber reinforced plastic (CFRP) in aircraft primary structures. In order to generate dates for model validations, the mechanical properties of T700/3234 were obtained by material performance tests, and energy-absorbing results were gained by quasi-static crushing tests of composite sinusoidal specimens. The correctness of composite material model and single-layer finite element model of composite sinusoidal specimens were verified based on the simulation results and test results that were in good agreement. A typical civil aircraft fuselage section with composite sinusoidal specimens under cargo floor was suggested. The crashworthiness of finite element model of fuselage section was assessed by simulating the vertical drop test subjected to 7 m/s impact velocity, and the influences of different thickness of sub-floor composite sinusoidal specimens on crashworthiness of fuselage section were also analyzed. The simulation results show that the established finite element model can accurately simulate the crushing process of composite sinusoidal specimens; the failure process of fuselage section is more stable, and the safety of occupants can be effectively improved because of the smaller peak accelerations that was limited to human tolerance, a critical thickness of sub-floor composite sinusoidal specimens can restrict the magnitude of acceleration peaks, which has certain reference values for enhancing crashworthiness capabilities of fuselage section and improving the survivability of passengers.

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Section: Finite Element Modelmentioning

confidence: 99%

Crashworthiness Analysis and Evaluation of Fuselage Section with Sub-floor Composite Sinusoidal Specimens

Mou

Zou

Feng

et al. 2016

Lat. Am. j. solids struct.

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“…Hence, it was decided to continue with the shell elements. Normally the triggering type 1 is modelled with shell elements with gradually reduced thickness [10,21] as shown in Figure 3 geometry of the composite tube; rather it would yield a double chamfering triggering geometry. To study the effect of triggering modelling, in addition to the Model A, one more possible modelling (Model B) was adopted where the shell elements are located as shown in Figure 3(b).…”

Section: Modellingmentioning

confidence: 99%

“…Very few quasi-static and impact numerical simulations [10,31] have been conducted for the triggering type 1 using shell elements. To get the initial peak crushing force the accurate numerical modelling of triggering is very important.…”

Section: Modellingmentioning

confidence: 99%

“…The static and dynamic axial collapse of CFRP tubes was well studied numerically in [9]. The numerical energy assessment of hybrid tubes made of pultruded tube overwrapped by braiding was studied by Han and his co-workers [10]. The peak load and the corresponding energy absorption characteristics of a square sandwich composite vehicle hollow body shell were discussed in ref [11].…”

Section: Introductionmentioning

confidence: 99%

“…However, there have been several studies proving that the well established and existing models available in commercial *Corresponding author: Sivakumar Palanivelu, Tel: +32-(0)9-264.33.15, Fax: +32-(0)9-264.35.87 Email: Sivakumar.Palanivelu@UGent.be finite element codes can be adopted to predict the energy absorption behaviour of a composite tube. Han et al [10] and Zarei et al [21] used Material model 54 of LS-DYNA to predict the failure patterns and the energy absorption of the circular and square crosssectional tubes respectively. Material model 54 [22] has the option of using either the TsaiWu failure or the Chang-Chang failure criteria for the individual lamina.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parametric study of crushing parameters and failure patterns of pultruded composite tubes using cohesive elements and seam, Part I: Central delamination and triggering modelling

et al. 2010

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Typically, most of the brittle composite tubes exhibit circumferential delamination, lamina bending, axial cracking and brittle fracturing when subjected to static and dynamic loading conditions. In this work, a new innovative approach was adopted to model the above said failure modes using cohesive elements under an axial impact loading case. The circular and square cross sectional pultruded profiles made of glass-polyester were considered for the study. A numerical parametric study has been conducted to study the effect of the delamination on the failure patterns and the corresponding energy absorption using a single layer and two layers of shell elements. To predict the peak crushing load and the energy absorption, the importance of the adequate numerical modelling of triggering is discussed. All numerical simulations were carried out using the commercially available finite element code ABAQUS V6.7-3 Explicit. Finally, the results of this comprehensive numerical investigation are compared with previously published experimental results [1]. Part II of this paper deals with the influence of multiple delaminations and modelling of axial cracks on the deformation patterns and the effect of initial geometric imperfections on the energy absorption.

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Structure design and multiobjective optimization of CFRP/aluminum hybrid crash box

Zha

Dong

et al. 2020

Polymer Composites

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To improve the crashworthiness and reduce vehicle weight, a crash box made of carbon fiber reinforced plastics (CFRP)/aluminum (Al) hybrid materials was introduced in the paper. Quasistatic axial compression tests and numerical simulations were conducted for pure Al tubes and CFRP/Al hybrid tubes. The simulation models were validated and were further employed to investigate the effects of geometry, aluminum tube thickness, fiber wrapping angle and CFRP layers on the crashworthiness of the hybrid crash box under axial loading and 30 oblique collision. The multiobjectives were taken to obtain the optimal geometrical dimensions, aluminum tube thickness, wrapping angle, and the number of layers. The crashworthiness of the optimal CFRP/Al hybrid crash box was compared with that of original aluminum crash box. It was found that the mass of the crash box was reduced by 35.21%, while the specific energy absorption (SEA) and mean crushing force (F mean) were increased by more than 18% and 46%, respectively. The paper was aimed to provide some references for the design and optimization of composite crash box.

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A numerical study on the axial crushing response of hybrid pultruded and ±45° braided tubes

Cited by 77 publications

References 21 publications

Crashworthiness Analysis and Evaluation of Fuselage Section with Sub-floor Composite Sinusoidal Specimens

Crashworthiness Analysis and Evaluation of Fuselage Section with Sub-floor Composite Sinusoidal Specimens

Parametric study of crushing parameters and failure patterns of pultruded composite tubes using cohesive elements and seam, Part I: Central delamination and triggering modelling

Structure design and multiobjective optimization of CFRP/aluminum hybrid crash box

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