Study on the low-velocity impact response and CAI behavior of foam-filled sandwich panels with hybrid facesheet

Yang, Bin; Wang, Zhenqing; Zhou, Limin; Zhang, Jifeng; Tong, Lili

doi:10.1016/j.compstruct.2015.07.058

Cited by 109 publications

(46 citation statements)

References 26 publications

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“…P c and δ c are the load and displacement when the crack propagates to a specific length Δa, while b and l are the width and length of the specimens, respectively. Δ S is the area covered by P c and δ c , as indicated in Figure 2 h. The minor deviations of experimental results in Table 3 , Table 4 and Table 5 may be caused by uncertainty factors in the manufacturing process of the anisotropic composite materials [ 28 , 29 ]. Specially, in Table 5 , the maximum loads in the three tests are 112.5 N, 1628.4 N, and 512.3 N, with corresponding failure displacements of 5.45 mm, 8.78 mm, and 10.67 mm, respectively.…”

Section: Methodsmentioning

confidence: 99%

Lamb Wave-Based Structural Health Monitoring on Composite Bolted Joints under Tensile Load

et al. 2017

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Online and offline monitoring of composite bolted joints under tensile load were investigated using piezoelectric transducers. The relationships between Lamb wave signals, pre-tightening force, the applied tensile load, as well as the failure modes were investigated. Results indicated that S0/A0 wave amplitudes decrease with the increasing of load. Relationships between damage features and S0/A0 mode were built based on the finite element (FE) simulation and experimental results. The possibility of application of Lamb wave-based structure health monitoring in bolted joint-like composite structures was thus achieved.

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Section: Methodsmentioning

confidence: 99%

Lamb Wave-Based Structural Health Monitoring on Composite Bolted Joints under Tensile Load

et al. 2017

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“…The use of the surface treatment and fiber conditions of the banana pseudo-stem fiber in order to increase the surface bonding between the fiber and matrix was still insufficient and failed to offer high resistance to CAI strength compared to synthetic fibers. With respect to CAI behavior in the sandwich structures experiments, core breaking and skin buckling were identified as the major failure modes of the sandwich structures [48]. Castanié et al [49] mentioned that matrix cracking and delamination between the face sheet and the core were found to be the most common damage mechanisms of the sandwich structure under residual compression strength.…”

Section: Compression After Impact (Cai) Of Structure Propertiesmentioning

confidence: 99%

Impact Damage Resistance and Post-Impact Tolerance of Optimum Banana-Pseudo-Stem-Fiber-Reinforced Epoxy Sandwich Structures

Hassan¹,

Sapuan²,

Rasid³

et al. 2020

Applied Sciences

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Banana fiber has a high potential for use in fiber composite structures due to its promise as a polymer reinforcement. However, it has poor bonding characteristics with the matrixes due to hydrophobic–hydrophilic incompatibility, inconsistency in blending weight ratio, and fiber length instability. In this study, the optimal conditions for a banana/epoxy composite as determined previously were used to fabricate a sandwich structure where carbon/Kevlar twill plies acted as the skins. The structure was evaluated based on two experimental tests: low-velocity impact and compression after impact (CAI) tests. Here, the synthetic fiber including Kevlar, carbon, and glass sandwich structures were also tested for comparison purposes. In general, the results showed a low peak load and larger damage area in the optimal banana/epoxy structures. The impact damage area, as characterized by the dye penetration, increased with increasing impact energy. The optimal banana composite and synthetic fiber systems were proven to offer a similar residual strength and normalized strength when higher impact energies were applied. Delamination and fracture behavior were dominant in the optimal banana structures subjected to CAI testing. Finally, optimization of the compounding parameters of the optimal banana fibers improved the impact and CAI properties of the structure, making them comparable to those of synthetic sandwich composites.

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“…The test results of Schubel et al [8] showed that the sandwich panels containing delamination in the impacted facesheets had edgewise compressive strength which is less than the half of the original strength. The reduction of residual compressive strength of sandwich panels with CFRP skins (60.8%) is far greater than that of panels with GFRP skins (14.3%) [12]. Castanie [13] proposed a core crush criterion to analyze the nonlinear impact response and predicted the residual strength of sandwich composite structures with impact damage.…”

Section: Introductionmentioning

confidence: 99%

Low-velocity impact responses and CAI properties of synthetic foam sandwiches

Wang

GangaRao

et al. 2019

Composite Structures

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This paper presents experimental and analytical studies on impact and compression after impact (CAI) responses of synthetic foam sandwiches with glass fiber reinforced polymer (GFRP) skins and synthetic foam cores under low-velocity impacting. The impact test results showed that the penetration depth of GFRP panels with synthetic foam is much smaller than that of bare synthetic foam panels. The edgewise compression test results indicated the facesheet debonding dominates the failure mode of the sandwich panels without lattice webs, while the failure mode of the sandwich panels with lattice webs is predominated by the wrinkling and delamination of the facesheets and the crushing of foam core. The influences of applied impact energy, GFRP lay-up, synthetic foam density and the existence of webs on the impact and post impact behavior of sandwich panels are discussed herein. Analytical models are proposed to predict the residual ultimate edgewise compressive load capacity of sandwich panels with lattice webs after impacts, using energy principles and variational methods in applied mechanics. The influences from impact damage, the local buckling of the facesheets and the confined strength of the foam core are measured and compared well with proposed analytical models.

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Study on the low-velocity impact response and CAI behavior of foam-filled sandwich panels with hybrid facesheet

Cited by 109 publications

References 26 publications

Lamb Wave-Based Structural Health Monitoring on Composite Bolted Joints under Tensile Load

Lamb Wave-Based Structural Health Monitoring on Composite Bolted Joints under Tensile Load

Impact Damage Resistance and Post-Impact Tolerance of Optimum Banana-Pseudo-Stem-Fiber-Reinforced Epoxy Sandwich Structures

Low-velocity impact responses and CAI properties of synthetic foam sandwiches

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