Using laminate hybridisation (CFRP-GFRP) and shaped CFRP plies to increase plate post-buckling strain to failure under shear loading

Damghani, Mahdi; Wallis, Christopher J.; Bakunowicz, Jerzy; Murphy, Adrian

doi:10.1016/j.tws.2021.107543

Cited by 18 publications

(4 citation statements)

References 39 publications

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“…Stacking sequence is essential in maintaining the expected properties of fiberhybrid composites. 14,16 Various stacking sequences can be implemented according to the loading types the composite structures would bear, [17][18][19][20][21][22][23][24] giving a fruitful palette to a wind turbine designer. However, wind turbines are exposed to dynamic ones like impact, which can be introduced to the structure by raindrops, hail, bird strikes during operation, or tool impacts during maintenance.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of fiber hybridization and matrix modification on mechanical properties of polymer composites

Demir

Yar

Eskizeybek

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Glass/carbon fiber reinforced hybrid composites are great candidates for wind turbine blade manufacturers to make larger blades. Variation of stacking sequences ensures design freedom to the composite engineers to optimize the composite structure's mechanical performance. On the other hand, matrix modification of polymer composites with nanoparticles is also of interest to introduce multifunctional properties. This research aims to scrutinize the influence of simultaneous fiber hybridization and matrix modification on polymer composites’ tensile, flexural, and low-velocity impact properties. Hybrid glass/carbon epoxy composites and hybrid glass/carbon/multi-walled carbon nanotube (MWCNT) multiscale polymer composites of stacking sequences [GCGCGC]S, [CGCGCG]S, and [G6C6] were manufactured. Fiber hybridization dramatically improved tensile strength between 51% and 76% compared to glass fiber composite. Depending on the stacking sequence, the flexural strength of the hybrid composites was improved between 10% and 16% concerning carbon fiber composite. With the introduction of MWCNTs, a slight increase in the tensile strength for unsymmetrical hybrid composites by around 5% and decreases by 7% for symmetrical ones were observed. Similar behavior was seen for bending characteristics. Additionally, low-velocity impact tests showed that it is achievable to bring greater impact peak forces up to 70% for hybrid composites than carbon fiber epoxy composites. MWCNTs modification of the matrix restrained the impact damage propagation, as proved by C-scan analysis.

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Section: Introductionmentioning

confidence: 99%

Combined effect of fiber hybridization and matrix modification on mechanical properties of polymer composites

Demir

Yar

Eskizeybek

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Nevertheless, researchers have optimized the structural strength of composites, enabling them to approach optimal bearing capacity in postbuckling. [ 6–10 ]…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, researchers have optimized the structural strength of composites, enabling them to approach optimal bearing capacity in postbuckling. [6][7][8][9][10] In recent years, the design technology has advanced significantly, with breakthroughs being made in stealth coatings. However, the layout of the civil aircraft, including skin, flange, beams, and rib, remains unchanged.…”

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confidence: 99%

Postbuckling behavior and failure prediction of large‐size composite C‐beam under bending‐shear coupling load

et al. 2023

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In this article, a novel experimental device that combines bending and shearing was proposed to investigate the load‐bearing performance of large‐size C‐beam structures against bending‐shear buckling, allowing for the adjustment of bending‐shearing ratio. Three different bending‐shear coupling conditions were performed for test loading, and the strain gauges were carried out to detect the strain distribution for postbuckling performance of the large‐size C‐beam. The finite element models were established by ABAQUS/Explicit to explore the stress distribution and damage evolution during postbuckling failure. Thereafter, the LaRC05 and Hashin criterion was used for failure prediction of the large‐size C‐beam in numerical simulations. The experiment results show that the large‐size C‐beam has excellent postbuckling bearing capacity regardless of bending or shear resistance. Based on the results, the failure numerical model considering the stress distribution in postbuckling and the finite element calculation were in good agreement with experiments. This study can offer a practical reference for the postbuckling performance of large‐size C‐beam structures after bending‐shear coupling.

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“…Lateral load resistance of the FRP plates by itself can be analogical to the steel plate shear walls (SPSWs) where the slender plate buckles before the full shear resistance, and the tension field actions develops at the post buckling phase of the lateral loadings [20,21]. The studies show that SPSWs can achieve reliable seismic performance with cyclic hysteretic behavior during the post buckling phase [22][23][24][25][26][27]. The stiffness of the surrounding frame of SPSWs plays an important role in development of the tension field action [28].…”

Section: Introductionmentioning

confidence: 99%

Tension Field Performance of GFRP Plate Shear Walls

Ulger

2021

Celal Bayar Üniversitesi Fen Bilimleri Dergisi

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Fiber Reinforced Polymer (FRP) composites are alternative to the conventional materials for many civil applications because of their prominent properties. The advanced production technology allows standardized quality structural FRP sections, which plays an important role in progress of structural engineering. Different fiber types can be rowed in these sections to improve the structural performance of these members. One of the most widely used FRP type is Glass Fiber Reinforced Polymers (GFRP) in the market for structural applications. The plate performance of GFRP plates as a lateral load resisting member within the moment frames was investigated in this study similar to the steel plate shear walls or timber shear walls. The post buckling performance of the GFRP plates including the experimental fracture values and different fiber orientations are studied. The tension field action is considered for the GFRP plates after the post buckling, and it was found that the gain for initial stiffness and story drifts is gradually reduces from flexible to rigid moment frames. The least lateral load capacity gain was about 16% when the fiber main direction is oriented 0o angle within the most rigid moment frame. As the fiber orientation aligned with the tension field angle, the load capacity and the initial stiffness increases. Finally, an analytical load capacity calculations are carried to verify the numerical results for the FRP plate shear walls employing the equivalent truss member approach, then plate thickness and panel aspect ratio effects are studied.

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Using laminate hybridisation (CFRP-GFRP) and shaped CFRP plies to increase plate post-buckling strain to failure under shear loading

Cited by 18 publications

References 39 publications

Combined effect of fiber hybridization and matrix modification on mechanical properties of polymer composites

Combined effect of fiber hybridization and matrix modification on mechanical properties of polymer composites

Postbuckling behavior and failure prediction of large‐size composite C‐beam under bending‐shear coupling load

Tension Field Performance of GFRP Plate Shear Walls

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