Residual crashworthiness of CFRP structures with pre-impact damage – An experimental and numerical study

Chen, Dongdong; Sun, Guangyong; Meng, Maozhou; Li, Guangyao; Li, Qing

doi:10.1016/j.ijmecsci.2018.08.030

Cited by 58 publications

(12 citation statements)

References 38 publications

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“…For the convenience in this study, each laminate was designated a code. Vacuum assisted resin infusion molding (VARIM) was adopted here to produce all the composite panels, which was considered as low-cost manufacturing process while obtaining high quality of composites [36,43] previous work [44]. The crosshead/weight was 7.131 kg and a hemisphere shaped impactor with a diameter of 12.7 mm was kept as a constant value for all the tests.…”

Section: Experimental Procedures 21 Materials and Specimen Preparationmentioning

confidence: 99%

Low velocity impact behavior of interlayer hybrid composite laminates with carbon/glass/basalt fibres

Chen

Luo

Meng

et al. 2019

Composites Part B: Engineering

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153

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This work investigates the effects of carbon/glass/basalt hybridization and fabric structure on the low velocity impact resistance of fibre reinforced plastic composites. Interply hybrid specimens used in the study were fabricated in a sandwich-like stacking sequence using a vacuum assisted resin infusion molding technique. Low velocity impact tests were carried out to study effects of hybridization and fabric structure on the impact resistance of composite laminates. A continuum damage mechanical model was developed and validated for nonhybrid woven fabric laminates at different impact energy levels. Residual damage characteristics in the crosssectional view were identified using a 3D surface scanning system and an X-ray computed tomography (CT) method. On the basis of experimental results, numerical simulation was conducted to analyse the damage mechanisms of the hybrid laminates. Experimental results showed that: (a) hybrid laminates with carbon fibre as the core exhibited superior impact resistance for sandwich-like stacking sequence; (b) similar impact behaviors appeared for carbon laminates hybrid with either basalt or glass fibre; (c) for basalt fibre, weave fabric composite laminates exhibited better energy absorption capability and deformation resistance than cross-ply laminates reinforced by unidirectional fabrics.

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Section: Experimental Procedures 21 Materials and Specimen Preparationmentioning

confidence: 99%

Low velocity impact behavior of interlayer hybrid composite laminates with carbon/glass/basalt fibres

Chen

Luo

Meng

et al. 2019

Composites Part B: Engineering

Self Cite

153

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“…Among the typical damage modes for composites, delamination is regarded as the most significant mode because it may propagate undetectably and result in the unforeseen collapse of the structures [35]. The cohesive zone model (CZM) has been widely used in many previous works [36,37,38,39,40,41]. The mixed mode cohesive laws have to reduce to the corresponding normal and tangential tractionseparation laws under pure mode loading.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the repeated low-velocity impact behavior of composite laminates

Zhou

Wen

Wang

2020

Composites Part B: Engineering

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The dynamic mechanical responses and damage development of cross-ply composite laminates under repeated low-velocity impact are investigated through finite element simulations with ABAQUS/Explicit. A progressive damage model for laminates, consisting of the continuum damage model, the 3D Hashin failure criterion and the damage evolution model based on equivalent displacement, is integrated with the bilinear traction-separation relationship cohesive model to simulate the damage initiation, evolution and propagation behavior of different damage modes in composite laminates. Compared with the experimental results, the established finite element model was validated through the global mechanical response and damage distribution contous. Besides, a mesh refinement study was performed by using three different element sizes. The validated model was adopted to investigate the repeated impact behaviors of composite laminates under three different energies. The qualitative conclusions about the effects of repeated impact on global mechanical response were summarized by the changes of impact force, displacement, contact time and energy absorption. Moreover, the effects of repeated impact on the damage characteristics and expansions of matrix and delamination were discussed in detail.

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“…Considerable experimental and computational work has been reported on the topic of predicting LVI damage of composite laminates. [8][9][10][11][12][13] Analytical solutions based on a number of simplifying assumptions have been used by researchers to predict the impact event. [14][15][16][17] Since the complex failure mechanism, the analytical solutions are limited to a rough prediction of contact force and delamination.…”

Section: Introductionmentioning

confidence: 99%

Bridging the low-velocity impact energy versus impact damage and residual compression strength for composite laminates

Zhang

Xiulin

Zhou

et al. 2020

Journal of Reinforced Plastics and Composites

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A finite element (FE) model based on fiber kinking and a transversal fracture angle damage model with cohesive elements are proposed to simulate the low-velocity impact (LVI) and compression after impact (CAI), and build a relationship between LVI energy and CAI strength of composites. The proposed FE model is validated by a comprehensive experimental work conducted using a high strength carbon fiber/epoxy material system i.e. CCF300/BA9916II and underwent LVI and CAI experimentation. The relative errors between numerical and experimental results of LVI damage area, maximum impact force, impact time, as well as CAI strength are less than 5%. The FE analysis results of LVI show that the dominant damage mode is delamination, and the CAI results demonstrate a brittle behavior with almost no loss of stiffness before failure. It is further deduced that the relationship of LVI energy and damage induced is directly proportional initially; however, after a threshold level of impact energy, the curve turns horizontal so that the increase in further impact energy does not increase the damage area substantially. A similar relationship is developed between impact energy and CAI strength.

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Residual crashworthiness of CFRP structures with pre-impact damage – An experimental and numerical study

Cited by 58 publications

References 38 publications

Low velocity impact behavior of interlayer hybrid composite laminates with carbon/glass/basalt fibres

Low velocity impact behavior of interlayer hybrid composite laminates with carbon/glass/basalt fibres

Numerical investigation on the repeated low-velocity impact behavior of composite laminates

Bridging the low-velocity impact energy versus impact damage and residual compression strength for composite laminates

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