Numerical simulation and theoretical analysis of the crashworthiness of a tree-like hierarchical multicellular bi-tube

Mechanics of Advanced Materials and Structures, Год журнала: 2024, Номер unknown, С. 1 - 22

Опубликована: Май 22, 2024

Drawing inspiration from the branching structure of trees, a novel Tree-like Hierarchical Multi-cellular Bi-tube (THMBT) has been devised. This design merges hierarchical distribution traits tree branches with superior crashworthiness double square tube structures. Utilizing validated finite element model, this study investigates THMBT, examining impacts wall thickness, bifurcation angle, and length on its performance. The Simplified Super Folding Element theory is employed for theoretical analysis, facilitating calculation mean crushing force THMBT. Findings reveal that thickness exerts most pronounced influence crashworthiness. As increases, THMBT-3 demonstrates substantial 88.07% enhancement in specific energy absorption, accompanied by notable increase peak force. Particularly noteworthy exceptional angle (θ) 60°. For instance, efficiency 0.5 mm reaches 92.08%. Furthermore, when considering different lengths under same coefficients (c) set to 1/3, both THMBT-2 exhibit impact resistance within their respective marks significant advancement integrating biomimetic tubes, resulting improvement structural findings offer valuable insights further development tubes.

Язык: Английский

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Mechanical Characteristics of Sandwich Structures with 3D-Printed Bio-Inspired Gyroid Structure Core and Carbon Fiber-Reinforced Polymer Laminate Face-Sheet

Polymers, Год журнала: 2024, Номер 16(12), С. 1698 - 1698

Опубликована: Июнь 14, 2024

The gyroid structure is a bio-inspired that was discovered in butterfly wings. geometric design of the wings offers unique combination strength and flexibility. This study investigated sandwich panels consisting 3D-printed core carbon fiber-reinforced polymer (CFRP) facing skin. A filament fused fabrication 3D printer machine used to print cores with three different relative densities, namely 10%, 15%, 20%. Polylactic acid (PLA) as printing material for gyroid. then sandwiched joined by an epoxy resin between CFRP laminates. Polyurethane foam (PUF) filled into fill cavity on another set samples. Flexural compression tests were performed samples investigate mechanical behavior sandwiches. Moreover, two-parameter Weibull distribution evaluate results statistically. As result, sandwich-specific stress shear from three-point bending test composites increased increase density. Core density controls flexural characteristics sandwich. Adding PUF improves deflection at maximum sustained load after fracture Compression strength, modulus, energy absorbed sandwiches their specific properties are higher than PUF-filled equal

Язык: Английский

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Crashworthiness analysis of okra biomimetic corrugated multi-cellular structure

International Journal of Mechanical Sciences, Год журнала: 2024, Номер 280, С. 109459 - 109459

Опубликована: Июнь 27, 2024

Язык: Английский

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Enhanced damage tolerance and fracture toughness of lightweight carbon-Kevlar fiber hybrid laminate

Journal of Composite Materials, Год журнала: 2024, Номер 58(9), С. 1109 - 1121

Опубликована: Фев. 17, 2024

Low damage tolerance and residual strength are the main drawbacks of carbon fiber composite laminates that limit their application in many lightweight structures. This study demonstrates exceptional high fracture toughness carbon-Kevlar hybrid laminate, where Kevlar plies placed between two face sheets. Flexural after mode I translaminar were evaluated using three-point bending single-edge notched tests, respectively. The mechanisms three configurations investigated micro-computed tomography correlated with mechanical responses. results showed laminate could sustain 70% occurs can same for large strains, unlike laminates, they both lose integrity breakage. Moreover, this 200% 170% larger specific absorbed energy than improvement be justified by propagation breakage at different positions core delamination interface allowed dissipation during fracture. Additionally, it 21% 42.7% absolute toughness, respectively, laminate.

Язык: Английский

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Bio-inspired vertex-offset lattice metamaterials with enhanced stress stability and energy absorption

Thin-Walled Structures, Год журнала: 2025, Номер 210, С. 113060 - 113060

Опубликована: Фев. 7, 2025

Язык: Английский

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Design and study of the crashworthiness of two-way gradient topology star-shaped honeycombs

Mechanics of Advanced Materials and Structures, Год журнала: 2025, Номер unknown, С. 1 - 14

Опубликована: Март 28, 2025

Язык: Английский

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Nonlinear thermo-mechanical static stability analysis of FG-TPMS shallow spherical shells

Thin-Walled Structures, Год журнала: 2024, Номер 205, С. 112343 - 112343

Опубликована: Авг. 14, 2024

Язык: Английский

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Novel conformal sandwich lattice structures: Design concept, fabrication and mechanical properties

Thin-Walled Structures, Год журнала: 2024, Номер 199, С. 111806 - 111806

Опубликована: Март 18, 2024

Язык: Английский

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Buckling behaviour for advance cylindrical shells (COPV) subjected to extreme pressure conditions: A comprehensive review

Polymer Composites, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Abstract Hemispherical end caps cover cylindrical pressure vessels mid‐surfaces for oil and gas, subsea vacuum enclosures, automobile, aerospace hydrogen carriers globally. This review discusses the importance of composite overwrapped vessel design characteristics like external pressures. The analysis material properties their resistive behavior on section is used to ensure accurate, safe, effective operation at high Composite materials are popular lightweight end‐use performance in diverse applications. Current fibers include carbon, glass, carbon/glass hybrid that employ less heavy material. (COPV) need accurate lamina sequence, laminate thickness, fiber winding angles. Mandrel (liner) material, also examined suggested metallic high‐pressure (MC‐HPVs) including metal liners or circular rings circumferentially decrease buckling reinforce (Type‐III) COPV shells. focus designing components prevent space rockets automobiles under conditions, using stiffeners holes various stress scenarios. Genetic algorithm (GA) optimizes worst defects cylinder shape buckling, cutting shell optimum stacking sequence lamination over liner, snap‐through reactions support against factors pressure. autofrettage vibration was analyzed. Liner‐less (Type‐V) represent future high‐performance vessels, yet (Type IV) cylinders with plastic light strong have numerous uses. Highlights Buckling shells mandrel transition.

Язык: Английский

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Experimental and numerical investigation of an additively manufactured sandwich composite bridge deck utilizing gyroid building blocks

Composite Structures, Год журнала: 2024, Номер 343, С. 118304 - 118304

Опубликована: Июнь 16, 2024

Язык: Английский

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