Theoretical and Experimental Study of the Vibration Dynamics of a 3D-Printed Sandwich Beam With an Hourglass Lattice Truss Core

Guo, Zhenkun; Hu, Guobiao; Jiang, Jianjun; Yu, Liuding; Li, Xin; Liang, Junrui

doi:10.3389/fmech.2021.651998

Cited by 11 publications

(6 citation statements)

References 43 publications

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“…Outcomes coincide perfectly with an octahedron core's natural frequencies by adjusting its cell [26]. Guo et al (2021) investigated vibration analyses and passive control of sandwiched beams by 3D printed lattice. Theoretical results confirmed empirically, literature findings and simulation showed how 3D printing could create complex lattice cores [27].…”

Section: Introductionmentioning

confidence: 87%

Sandwiched Plate Vibration Analysis with Open and Closed Lattice Cell Core

Raad

Njim

Jweeg³

et al. 2023

Phys. Chem. Solid St.

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This work attempts to replace the sandwich core's traditional shape and material with a cellular pattern, where the cells have a regular shape, distribution, and size. The contribution of this paper is to design two structures, one open-celled and the other closed, and to evaluate the performance of sandwich plates with lattice cell core as it is used for many industrial applications, particularly in automobile engineering. The new theoretical formulations are constructed for two structures to find the free vibration characteristics. The results of the new design are compared with the traditional shape. Derivation of equations to predict mechanical properties based on relative density with the chosen shapes, specific vibration equation of three-layer sandwich plate, and substitution by equation using excel sheet. Results are promising, and the effectiveness of cellular pattern theoretical analysis estimation. Limitations and error rates for the mechanical properties come through the empirical equations, and their ratio to the relative density values are higher depending on the behavior of the core material. Findings reveal, with open cell decrease in modulus of elasticity by (PLA: -90.4%) and (TPU: -90.4%), increases natural frequency by (PLA: 44.5%) and (TPU: 46.4%), as for closed-cell decreases in the modulus of elasticity by (PLA: -66.9%) and (TPU: -64.4%), increases natural frequency by (PLA: 36%) and (TPU: 37.7%). Converting a solid substance or replacing a foam form with a cellular pattern is one way to better performance and save weight through the selected cell pattern in absorbing the energy of the vibration wave.

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Section: Introductionmentioning

confidence: 87%

Sandwiched Plate Vibration Analysis with Open and Closed Lattice Cell Core

Raad

Njim

Jweeg³

et al. 2023

Phys. Chem. Solid St.

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“…While embedding architecture into materials is not new, recent advancements in additive manufacturing technologies have revolutionized the creation of cellular materials with increasingly complex and tailored designs. These technologies allow for precise control over the internal structure and properties of the materials, offering unprecedented possibilities for material engineers (Guo et al, 2021;Kladovasilakis et al, 2022;Yang et al, 2023b).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, researchers have begun to explore the use of cellular cores with band gap properties. Guo et al (2021)conduct a comprehensive investigation into the dynamics of a 3D-printed sandwich beam with an hourglass lattice truss core. It presents a theoretical model validated through finite element analysis and experimental tests.…”

Section: Introductionmentioning

confidence: 99%

Efficient design of sandwich panels with cellular truss cores and large phononic band gaps using surrogate modeling and global optimization

Meruane,

Puiggros,

Fernandez

et al. 2024

Front. Mech. Eng.

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Recent advancements in additive manufacturing technologies and topology optimization techniques have catalyzed a transformative shift in the design of architected materials, enabling increasingly complex and customized configurations. This study delves into the realm of engineered cellular materials, spotlighting their capacity to modulate the propagation of mechanical waves through the strategic creation of phononic band gaps. Focusing on the design of sandwich panels with cellular truss cores, we aim to harness these band gaps to achieve pronounced wave suppression within specific frequency ranges. Our methodology combines surrogate modeling with a comprehensive global optimization strategy, employing three machine learning algorithms—k-Nearest Neighbors (kNN), Random Forest Regression (RFR), and Artificial Neural Networks (ANN)—to construct predictive models from parameterized finite element (FE) analyses. These models, once trained, are integrated with Particle Swarm Optimization (PSO) to refine the panel designs. This approach not only facilitates the discovery of optimal truss core configurations for targeted phononic band gaps but also showcases a marked increase in computational efficiency over traditional optimization methods, particularly in the context of designing for diverse target frequencies.

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“…In recent years, some studies have been conducted on the modal properties of structures made in 3D printing technology. The authors determine natural frequencies and modes of vibrations of simple structures, such as a cantilever beam [ 11 ] or a complex innovative metastructure [ 12 ] in theoretical, numerical, and experimental ways.…”

Section: Introductionmentioning

confidence: 99%

On the Possibility of Using 3D Printed Polymer Models for Modal Tests on Shaking Tables: Linking Material Properties Investigations, Field Experiments, Shaking Table Tests, and FEM Modeling

et al. 2023

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In this article, the possibility and the pertinence of using 3D printed polymeric materials for models in modal tests on shaking tables were recognized. Four stages of the research have been linked: The material properties investigation, the field experiment on the modal properties of the reinforced concrete chimney (a prototype), the shaking table tests on the modal properties of the 3D printed polymer model of the chimney, scaled according to the similarity criteria, and the numerical calculations of the FE model of the 3D printed mockup. First, the investigation of the properties of 3D printed polymer materials revealed that the direction of lamination had no significant effect on the modulus of elasticity of the material. This is a great benefit, especially when printing models of tall structures, such as chimneys, which for technical reasons could only be printed in a spiral manner with the horizontal direction of lamination. The investigation also proved that the yield strength depended on the direction of the lamination of the specimens. Next, the natural frequencies of the chimney, assessed through the field experiment and the shaking table tests were compared and showed good compatibility. This is a substantial argument demonstrating the pertinence of using 3D printed polymer materials to create models for shaking table tests. Finally, the finite element model of the 3D printed polymer mockup was completed. Modal properties obtained numerically and obtained from the shaking table test also indicated good agreement. The presented study may be supportive in answering the question of whether traditional models (made of the same material as prototypes) used in shaking table tests are still the best solution, or whether innovative 3D printed polymer models can be a better choice, in regard to the assessment of the modal properties and the dynamic performance of structures.

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Theoretical and Experimental Study of the Vibration Dynamics of a 3D-Printed Sandwich Beam With an Hourglass Lattice Truss Core

Cited by 11 publications

References 43 publications

Sandwiched Plate Vibration Analysis with Open and Closed Lattice Cell Core

Sandwiched Plate Vibration Analysis with Open and Closed Lattice Cell Core

Efficient design of sandwich panels with cellular truss cores and large phononic band gaps using surrogate modeling and global optimization

On the Possibility of Using 3D Printed Polymer Models for Modal Tests on Shaking Tables: Linking Material Properties Investigations, Field Experiments, Shaking Table Tests, and FEM Modeling

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