Investigation of free and forced vibration of GFRP corrugated bio-inspired sandwich beam with HSDT: Numerical and experimental study

Gunasegeran, Muthukumaran; Sudhagar, P. Edwin

doi:10.1080/15376494.2022.2081750

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…The concept of sandwich structures has been widely adopted in various industries due to their exceptional mechanical properties, such as high strength, stiffness, and energy absorption capabilities while maintaining a relatively low weight. These materials find applications in diverse fields, including aerospace, automotive, marine, and civil engineering, where lightweight and high-performance materials are of utmost importance [7].…”

Section: Introductionmentioning

confidence: 99%

Biomimetics Design of Sandwich-Structured Composites

Kunzmann,

Aliakbarpour,

Ramezani

2023

J. Compos. Sci.

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In the context of energy efficiency and resource scarcity, lightweight construction has gained significant importance. Composite materials, particularly sandwich structures, have emerged as a key area within this field, finding numerous applications in various industries. The exceptional strength-to-weight ratio and the stiffness-to-weight ratio of sandwich structures allow the reduction in mass in components and structures without compromising strength. Among the widely used core designs, the honeycomb pattern, inspired by bee nests, has been extensively employed in the aviation and aerospace industry due to its lightweight and high resistance. The hexagonal cells of the honeycomb structure provide a dense arrangement, enhancing stiffness while reducing weight. However, nature offers a multitude of other structures that have evolved over time and hold great potential for lightweight construction. This paper focuses on the development, modeling, simulation, and testing of lightweight sandwich composites inspired by biological models, following the principles of biomimetics. Initially, natural and resilient design templates are researched and abstracted to create finished core structures. Numerical analysis is then employed to evaluate the structural and mechanical performance of these structures. The most promising designs are subsequently fabricated using 3D printing technology and subjected to three-point bending tests. Carbon-fiber-reinforced nylon filament was used for printing the face sheets, while polylactic acid (PLA+) was used as the core material. A honeycomb-core composite is also simulated and tested for comparative purposes, as it represents an established design in the market. Key properties such as stiffness, load-bearing capacity, and flexibility are assessed to determine the potential of the new core geometries. Several designs demonstrated improved characteristics compared to the honeycomb design, with the developed structures exhibiting a 38% increase in stiffness and an 18% enhancement in maximum load-bearing capacity.

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Section: Introductionmentioning

confidence: 99%

Biomimetics Design of Sandwich-Structured Composites

Kunzmann,

Aliakbarpour,

Ramezani

2023

J. Compos. Sci.

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“…Numerous core designs have been used in sandwich structures, including honeycomb, 2 soft cores, 3 elastomers, 4 and bio‐inspired cores . 5 In composite sandwich structures, the core layer transfers the shear stress throughout the structure, boosting the composite's damping property and high bending stiffness. Generally, it has high stiffness in out‐of‐plane direction and the greatest shear strength in longitudinal conditions 6…”

Section: Introductionmentioning

confidence: 99%

Free and forced vibration response of a laminated composite sandwich beam with dual honeycomb core: Numerical and experimental study

Thanikasalam,

Ramamoorthy

2023

Polymer Composites

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Free and forced vibration characteristics of composite sandwich beams with single‐core (SC) and dual‐core (DC) are investigated in this study. The wet hand‐layup technique is followed to make the composite face sheet, and honeycomb cores are 3D printed using the fused filament fabrication method. The natural frequencies of SC and DC sandwich beams were measured using experimental modal tests and validated through a three‐dimensional finite‐element model. Also, parametric studies on the geometry of composite structures are performed to scrutinize the effect of DC sandwich beams with different ply orientations, length‐to‐breadth ratios, core thickness, and core cell wall thickness. In addition, the transverse vibration responses of SC and DC sandwich beams are examined under harmonic force excitations at different end conditions. The study result shows that the sandwich beam's vibration behavior is enhanced by the inclusion of a core.

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“…The tapered sandwich plates loss factors and stiffness are improved by the hybrid honeycomb core patterns. Gunasegeran and Sudhagar 40,41 designed a honeycomb structure with an enhanced out-of-plane shear modulus inspired by bamboo. The sandwich beams eigenfrequencies, and loss factors are increased due to the shear modulus.…”

Section: Introductionmentioning

confidence: 99%

Vibrational behavior of a 3D printed biomimetic dual‐core composite sandwich beam: An experimental and numerical study

Thanikasalam,

Ramamoorthy

2023

Polymer Composites

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Composite sandwich structures have been used in various applications like aerospace, automotive, and maritime sectors. The process of identifying the core design and the selection of a prominent core is crucially important in sandwich structures. In this study, biomimetic core development and vibration responses of composite sandwich beams with a dual biomimetic honeycomb core are investigated. The composite face layers are fabricated by the hand lay‐up method, and the fused deposition modeling is used to 3D print the PLA honeycomb cores. Based on ASTM‐E1876 and the alternative dynamic approach, the face layer elastic properties and rigidity modulus of the cores are evaluated, respectively. The numerical simulation is used to predict the sandwich panels' natural frequencies and mode shapes and verified with experimental results. There was an excellent agreement between the calculated and experimental natural frequencies. Due to the presence of the core and enhanced rigidity modulus, the dual lamellar honeycomb core sandwich beam produces the highest natural frequencies among all‐composite sandwich beams, followed by the dual regular honeycomb, single lamellar honeycomb, and single regular honeycomb cores. The geometric parametric studies, including core thickness, length‐to‐breadth ratio, lamination schemes, support conditions, and transverse vibration responses were also analyzed for different sandwich patterns. As a result of this work, thick composite sandwich panels in aeronautical and marine structures can be replaced with dual biomimetic core structures. The study highlights the fact that the dual‐core sandwich beam provided greater modal frequency than the single‐core beam with the same weight proportions.Highlights Pistachio nut shell‐based biomimetic honeycomb core has been developed. Alternative dynamic approach is used to find sandwich‐core shear properties. Lamellar‐infused biomimetic model yields higher shear modulus and stiffness. Dual‐core beam having high flexural stiffness enhances the natural frequency. Various parametric studies were analyzed for different sandwich patterns.

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Investigation of free and forced vibration of GFRP corrugated bio-inspired sandwich beam with HSDT: Numerical and experimental study

Cited by 14 publications

References 39 publications

Biomimetics Design of Sandwich-Structured Composites

Biomimetics Design of Sandwich-Structured Composites

Free and forced vibration response of a laminated composite sandwich beam with dual honeycomb core: Numerical and experimental study

Vibrational behavior of a 3D printed biomimetic dual‐core composite sandwich beam: An experimental and numerical study

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