A numerical-experimental assessment on a composite fuselage barrel vertical drop test: Induced damage onset and evolution

Riccio, Aniello; Saputo, Salvatore; Sellitto, Andrea; Caprio, Francesco Di; Palma, Luigi Di

doi:10.1016/j.compstruct.2020.112519

Cited by 38 publications

(21 citation statements)

References 41 publications

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“…60 Regarding the above, it is necessary to employ interdisciplinary research methods enabling the description of failure of the composite materials. [61][62][63][64][65] Additionally, the numerical investigations presented in work constitutes a complex issue, through globally occurring cohesive zones between all layers in thin-walled composite structure.…”

Section: Introductionmentioning

confidence: 99%

Stability and failure of compressed thin‐walled composite columns using experimental tests and advanced numerical damage models

Różyło

2021

Numerical Meth Engineering

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The current study investigates the stability and failure analysis of thin-walled composite columns with a top-hat and channel cross section, subjected to axial compression. The analyzed structures were made of composite material (carbon fiber reinforced polymer) by autoclave technique. The study included experimental tests on actual specimens and numerical simulations on numerical models using finite element method (in ABAQUS® program).Experimental-numerical analysis was conducted over the full range of loading (until failure phenomenon). Regarding the experimental tests, postbuckling equilibrium paths as well as acoustic emission signals were registered, which directly allowed for comprehensive analysis of failure phenomenon of composite material. In case of numerical simulations, two independent numerical damage models were used. The first one constitutes the progressive failure analysis, considering the damage initiation criteria using Hashin's theory and damage evolution based on the energy criterion. The second one constitutes the cohesive zone model, which was used to simulate failure of composite material caused by delamination phenomenon. Both experimental and numerical results show high agreement. Furthermore, the obtained results reveal an interesting relationship between buckling, postbuckling, and failure phenomenon of the analyzed structures.

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Section: Introductionmentioning

confidence: 99%

Stability and failure of compressed thin‐walled composite columns using experimental tests and advanced numerical damage models

Różyło

2021

Numerical Meth Engineering

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“…As a result, the experiments and their numerical simulations to describe the failure of the composite structure was compared for load, displacements, and deformations and found a good agreement. [21] Nanoreinforcements may provide desired impact responses in the case of LVI. The addition of nanoparticles to the epoxy matrix to improve the fiber/ matrix interface strength for composite pipe under LVI is reported by Kara et al and Tas ¸yürek et al [22,23] In addition, the investigation of impact damages that may occur due to LVI on composite pipes and CPVs under internal pressure has been extensively discussed in the literature as a research topic.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the effect of graphene nanoplatelets on the low‐velocity impact response of prestressed filament wound basalt‐based composite pressure vessels

Sepetcioglu

2021

Polymer Composites

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The purpose of this study is to investigate the impact behavior of composite pressure vessel (CPV) in-service case. Additionally, graphene nanoplatelets (GnPs) were introduced to epoxy resin. [±55 ] 4 basalt/epoxy specimens were manufactured using the filament-winding method, and the low-velocity impact (LVI) response was investigated. The LVI tests of CPVs were performed at energy levels of 2.5, 5, 7.5, 10, 15, 20, and 25 J under 50 bar internal pressure. The prestress value considering the internal pressure used under service conditions was taken as 1:5 of the burst pressure of the basalt/epoxy CPVs. After the LVI tests, the contact force-time and force-displacement curves were acquired. Also, absorbed energy values by CPVs were calculated over the obtained curves. The effects of GnPs on damage formations on basalt/epoxy CPVs under LVI loads were evaluated based on microscopic analysis. According to evaluations, damage formations such as matrix cracks on outer and inner surfaces of CPV, transverse cracks, and delamination were detected. Test liquid was detected on the impact surface at 25 J LVI test. The leakage observed due to the 25 J impact energy proves that damages can result in a leakage path. Consequently, the areas of damage formed in the cross sections perpendicular to the axis of basalt/epoxy CPVs decrease with the addition of GnPs, and the CPVs are more resistant to LVI effects.

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“…Moreover, the delamination phenomenon was modeled as globally occurring cohesive surfaces between all composite layers. Regarding the above, it is important to apply independent experimental and numerical testing methods in the evaluation of the failure mechanism [ 59 , 60 , 61 , 62 , 63 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Failure for Thin-Walled Composite Columns

Różyło

2021

Materials

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The novelty of this paper, in relation to other thematically similar research papers, is the comparison of the failure phenomenon on two composite profiles with different cross-sections, using known experimental techniques and advanced numerical models of composite material failure. This paper presents an analysis of the failure of thin-walled structures made of composite materials with top-hat and channel cross-sections. Both experimental investigations and numerical simulations using the finite element method (FEM) are applied in this paper. Tests were conducted on thin-walled short columns manufactured of carbon fiber reinforced polymer (CFRP) material. The experimental specimens were made using the autoclave technique and thus showed very good strength properties, low porosity and high surface smoothness. Tests were carried out in axial compression of composite profiles over the full range of loading—up to total failure. During the experimental study, the post-buckling equilibrium paths were registered, with the simultaneous use of a Zwick Z100 universal testing machine (UTM) and equipment for measuring acoustic emission signals. Numerical simulations used composite material damage models such as progressive failure analysis (PFA) and cohesive zone model (CZM). The analysis of the behavior of thin-walled structures subjected to axial compression allowed the evaluation of stability with an in-depth assessment of the failure of the composite material. A significant effect of the research was, among others, determination of the phenomenon of damage initiation, delamination and loss of load-carrying capacity. The obtained results show the high qualitative and quantitative agreement of the failure phenomenon. The dominant form of failure occurred at the end sections of the composite columns. The delamination phenomenon was observed mainly on the outer flanges of the structure.

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A numerical-experimental assessment on a composite fuselage barrel vertical drop test: Induced damage onset and evolution

Cited by 38 publications

References 41 publications

Stability and failure of compressed thin‐walled composite columns using experimental tests and advanced numerical damage models

Stability and failure of compressed thin‐walled composite columns using experimental tests and advanced numerical damage models

Experimental study on the effect of graphene nanoplatelets on the low‐velocity impact response of prestressed filament wound basalt‐based composite pressure vessels

Comparison of Failure for Thin-Walled Composite Columns

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