Axial crushing response of novel toothed gear bio-inspired 3D printed energy absorbing structures.

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 110033 - 110033

Published: Feb. 1, 2025

Language: Английский

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Mechanical Properties Analysis of the New Bionic Honeycomb Structure Under Out-of-Plane Crushing

Published: Jan. 1, 2025

Honeycomb is a kind of material with excellent performance, such as being lightweight and high-strength, widely used in aerospace, automotive, construction, other fields. Inspired by the natural turtle shell, novel bionic honeycomb structure devised adding inner tubes sinusoidal ribs to traditional hexagonal honeycomb. The crashworthiness this innovative was meticulously assessed using numerical simulations theoretical analysis methods. results revealed that new surpasses under same thickness. It noted performance more fully utilized when amplitude rib closer quarter period (T/4). Additionally, an increase structure's thickness correspondingly elevates its crashworthiness. In summary, based on simplified super folding element theory, we introduced predictive model for crushing force structure. prediction shows consistency results.

Language: Английский

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Low-velocity impact response of sandwich panels with hierarchical honeycomb and graded hierarchical honeycomb cores: A numerical approach

Journal of Sandwich Structures & Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

This study applied hierarchical honeycomb and graded cores to sandwich structures for creating two new types of lightweight high impact-resistant panels. The finite element model validated by the experiment was established investigate impact responses panels under low-velocity energies. Theoretical formulas based on energy-balance were predict total energy absorption, maximum force residual lower facesheet deflection both conventional (Type 1 structure) 2 structures. A polynomial used establish regression equations structural stiffness, upper indentation depth, with double-layer 3 structure). improved Non-dominated Sorting Genetic (NSGA-II) algorithm employed perform a multi-objective optimization design Type results showed that can improve stiffness resistance when density same. However, an 100J, applying core structure increased facesheet. Compared structure, optimized exhibited highest smallest depth improvements 39%, 15%, 33%, respectively. Moreover, influenced organization parameter gradient rate. promising present may be expected provide some insights more efficient crashworthy

Language: Английский

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Design of a New Energy Absorption Box with Honeycomb Structure for Vehicles and Research on Vehicle Crashworthiness

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

The energy absorbing box plays the role of buffering absorption in process frontal collision automobiles, but current structure is single, and effect limited. In this study, honeycomb was filled into a thin-walled square tube to design new type automotive box. Firstly, finite element model established with vehicle as research object, crashworthiness defects under condition are pointed out. Next, two filling forms boxes were designed, compared through impact simulation, followed by multi-objective optimization further enhance their performance. Finally, original replaced honeycomb-filled design. A simplified used compare before after replacement. results showed that, replacement, vehicle's acceleration decreased 11.49%, occupant compartment intrusion reduced 17.48%, ratio increased 12.51%. Crashworthiness safety have been improved.

Language: Английский

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Out-of-Plane Mechanical Behavior of 3D-Printed Polymeric Circular-Vertex-Based Hierarchical Hexagonal Honeycombs

Polymers, Journal Year: 2025, Volume and Issue: 17(7), P. 862 - 862

Published: March 24, 2025

Many studies show that hierarchical honeycombs have a superior performance compared to regular honeycombs. However, relevant experimental are limited due the fabrication challenges of featuring complex geometries. In this study, circular-vertex-based hexagonal (CHHHs) with different parameters were fabricated using polymeric 3D-printing technique, and their quasi-static out-of-plane mechanical behavior was investigated. The CHHHs constructed by replacing each solid vertex honeycomb (RHH) circular vertex. Quasi-static compression tests conducted on CHHHs, effect parameter deformation modes, properties, energy absorption characteristics results revealed both CHHH RHH specimens experienced cell wall fractures during compression, while exhibited enhanced damage resistance, compressive strength, specific (SEA) RHH. This study contributes understanding hierarchy

Language: Английский

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Shape Memory Alloy-Based Reconfigurable Wave Spring Vibration Isolator

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 110272 - 110272

Published: April 1, 2025

Language: Английский

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