A comparative study on energy absorption of flat sides and corner elements in CFRP square tube under axial compression

Fu, Jie; Liu, Qiang; Ma, Yitao; Zhang, Zengbo

doi:10.1016/j.tws.2021.108080

Cited by 25 publications

(15 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This failure criterion is a modification of Hashin's failure criterion for assessing lamina failure. The hourglass was set at 10% [3][4][5][6][7]43,53].…”

Section: Gfrp (Tencate E772)mentioning

confidence: 99%

“…Due to the high cost of conducting experimental studies, there is a need for reliable computational models capable of predicting the crushing response of composite structures. There have been various attempts to develop explicit finite element models (FEMs), with different degrees of precision, for circular tubes [2][3][4][5][6], square tubes [4][5][6][7][8][9][10][11][12][13], angle-stiffeners [8], C-channels [8] and hat-stiffeners [14]. The classification of structural FEM can be divided into two groups.…”

Section: Introductionmentioning

confidence: 99%

“…In recent studies, the single-layer configuration model has been used to simulate the behaviour of various composite structures in the case of, for instance, thin-walled square sections. This method is capable of accurately capturing the local buckling and unstable collapse; however, due to the complex failure mechanism of composite structures, this method was ineffective in depicting the progressive failure process [4]. Providing precise input of key material properties and numerical parameters in the material model (e.g., eleven parameters in MAT 54), and defining the contact definition between the test specimen and the impactor and applying an all degrees of freedom constraint on the end of the test specimen, the single-layer model was able to yield good correlation with the experimental load-displacement graph for cross-sections studied in [8].…”

Section: Introductionmentioning

confidence: 99%

“…The multi-layer modelling technique can be utilised for better capturing the failure process of the tubes undergoing progressive crushing [3][4][5][6][7]. However, in the multi-layer model, the correlation with the experimental load-displacement was not always satisfactory.…”

Section: Introductionmentioning

confidence: 99%

“…A finite element model was developed by [4]. This model was able to accurately predict the peak load of thin-walled square CFRP tube, although the specific energy absorption was underestimated by 33%.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Finite Element Modelling Approach for Progressive Crushing of Composite Tubular Absorbers in LS-DYNA: Review and Findings

Rabiee

Ghasemnejad

2021

J. Compos. Sci.

View full text Add to dashboard Cite

Robust finite element models are utilised for their ability to predict simple to complex mechanical behaviour under certain conditions at a very low cost compared to experimental studies, as this reduces the need for physical prototypes while allowing for the optimisation of components. In this paper, various parameters in finite element techniques were reviewed to simulate the crushing behaviour of glass/epoxy tubes with different material models, mesh sizes, failure trigger mechanisms, element formulation, contact definitions, single and various numbers of shells and delamination modelling. Six different modelling approaches, namely, a single-layer approach and a multi-layer approach, were employed with 2, 3, 4, 6, and 12 shells. In experimental studies, 12 plies were used to fabricate a 3 mm wall thickness GFRP specimen, and the numerical results were compared with experimental data. This was achieved by carefully calibrating the values of certain parameters used in defining the above parameters to predict the behaviour and energy absorption response of the finite element model against initial failure peak load (stiffness) and the mean crushing force. In each case, the results were compared with each other, including experimental and computational costs. The decision was made from an engineering point of view, which means compromising accuracy for computational efficiency. The aim is to develop an FEM that can predict energy absorption capability with a higher level of accuracy, around 5% error, than the experimental studies.

show abstract

“…This failure criterion is a modification of Hashin's failure criterion for assessing lamina failure. The hourglass was set at 10% [3][4][5][6][7]43,53].…”

Section: Gfrp (Tencate E772)mentioning

confidence: 99%