Flexural properties and failure mechanism of 3D-printed grid beetle elytron plates

Chen, Jinxiang; Hao, Ning; Zhao, Tidong; Song, Yiheng

doi:10.1016/j.ijmecsci.2021.106737

Cited by 17 publications

(4 citation statements)

References 56 publications

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“…In this study, we have referenced the existing literature and designed four honeycomb structures for use as fillers in automobile crash boxes. As shown in Figure 14 , we designed Triangular, Hexagonal, Kagome, and Re-entrant as the minimum lattice unit shapes [ 44 ]. Using the parameterization method in SolidWorks, we ensured that these four different honeycomb structures had the same density (

0.126 g/cm 3 ).…”

Section: Resultsmentioning

confidence: 99%

Fused-Deposition Modeling 3D Printing of Short-Cut Carbon-Fiber-Reinforced PA6 Composites for Strengthening, Toughening, and Light Weighting

Sun,

Mubarak,

Zhang

et al. 2023

Polymers

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Additive manufacturing of carbon-fiber-reinforced polymer (CFRP) has been widely used in many fields. However, issues such as inconsistent fiber orientation distribution and void formation during the layer stacking process have hindered the further optimization of the composite material’s performance. This study aimed to address these challenges by conducting a comprehensive investigation into the influence of carbon fiber content and printing parameters on the micro-morphology, thermal properties, and mechanical properties of PA6-CF composites. Additionally, a heat treatment process was proposed to enhance the interlayer bonding and tensile properties of the printed composites in the printing direction. The experimental results demonstrate that the PA6-CF25 composite achieved the highest tensile strength of 163 MPa under optimal heat treatment conditions: 120 °C for 7.5 h. This corresponds to a significant tensile strength enhancement of 406% compared to the unreinforced composites, which represents the highest reported improvement in the current field of CFRP-fused deposition 3D printing. Additionally, we have innovatively developed a single-layer monofilament CF-OD model to quantitatively analyze the influence of fiber orientation distribution on the properties of the composite material. Under specific heat treatment conditions, the sample exhibits an average orientation angle μ of 0.43 and an orientation angle variance of 8.02. The peak frequency of fiber orientation closely aligns with 0°, which corresponds to the printing direction. Finally, the study explored the lightweight applications of the composite material, showcasing the impressive specific energy absorption (SEA) value of 17,800 J/kg when implementing 3D-printed PA6-CF composites as fillers in automobile crash boxes.

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0.126 g/cm 3 ).…”

Section: Resultsmentioning

confidence: 99%

Fused-Deposition Modeling 3D Printing of Short-Cut Carbon-Fiber-Reinforced PA6 Composites for Strengthening, Toughening, and Light Weighting

Sun,

Mubarak,

Zhang

et al. 2023

Polymers

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“…This highlights the direction for the development of loadbearing BEPsc members with outstanding thermal insulation properties. 3) Recently, various biomimetic models have emerged, with dozens of biomimetic models for the three-dimensional structure of beetle forewings alone in this highly specialized field (Jiang et al, 2019;Zhang et al, 2018Zhang et al, , 2020bChen et al, 2021b). Furthermore, there is a trend of accelerating emergence of new models.…”

Section: Comprehensive Analysis Of the Four Modelsmentioning

confidence: 99%

Structural Parameters and Comparative Analysis of the Performance of Four Beetle Elytron Plate Walls

Li,

Hu,

Chen

et al. 2024

Journal of Civil Engineering and Management

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This article presents the characteristics of four straw-filled beetle elytron plate (BEPsc) nonload-bearing walls, with their thermal and mechanical properties ascertained by the finite element method, focusing on structural parameters reported in previous studies and further optimized in this paper. The results are as follows: 1) The sequence of the four models’ mechanical and thermal insulation properties with the reported structural parameters is given. The mechanical properties are mainly affected by the core layer’s out-of-plane bending moment of inertia Ix. The insulation capability is mainly governed by the minimum cross section of the core concrete. Based on this result, a BEP with nonuniform cross-sectional honeycomb walls is proposed. 2) Further optimization is conducted on the two models with the weakest mechanical and thermal properties. The I-beam beetle elytron plate (IBEPsc) is proven most suitable for nonload-bearing walls. The potential for end-trabecular beetle elytron plate (EBEPsc) in hollow floors is expected. 3) As biomimetic models emerge constantly, it is of great significance to conduct parallel comparisons between new and old models to determine their performance levels and advantages. This paper provides an example for selecting suitable BEPs for applications and an inspiration for more work on screening outstanding biomimetic models.

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“…The bending stiffness is calculated as the ratio of the bending load and its corresponding displacement. The energy absorption performance is measured by the deformation energy calculated from the work done at the loading point according to Chen et al 28 After the variable-density topology optimization of the quasi-honeycomb core, when f = 40%, the deflection and strain are basically unchanged for the loads less than 69 and 51 N, respectively. They and their increments in the unit load decrease for the loads greater than 69 and 51 N. When f = 50%, the deflection slightly increases and obviously decreases for the loads less and greater than 108 N, respectively.…”

Section: Bending Behavior Analysismentioning

confidence: 99%

Section: Test Analysis On Bending Behaviors Of Quasi-honeycomb Sandwi...mentioning

confidence: 99%

Variable-density topology optimization and bending test of quasi-honeycomb sandwich structures

Zhang

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The topology optimization is considered to enhance the strength, stiffness, and specific energy absorption of a quasi-honeycomb sandwich structure since it can achieve the optimal distribution of materials. However, the existing material interpolation models do not make the topology structure have good clarity and stability. In the present study, a novel variable-density topology optimization based on an improved interpolation model is developed for the design of a quasi-honeycomb core. The combined cells are circularly spreading outward from the geometric center of the design domain, and the wall thickness function of the equivalent cell (i.e. a simplified model of the combined cell) is established on the basis of relative density. The SR material interpolation model is modified by adding the minimum elastic modulus term, fitting the weighting and penalty factors, and adopting the volume constraint of Bi-directional Evolutionary Structural Optimization (BESO). The optimization is conducted to minimize the compliance of the quasi-honeycomb core, in which the relative densities of equivalent cells are chosen as the design variables due to the mapping between topology elements and equivalent cells. The three-dimensional (3D) geometric models of original and optimized quasi-honeycomb cores, upper face sheets, and lower face sheets are built using SolidWorks and printed on a 3D printer. The deflection, strain, bending stiffness, and energy absorption under different material retention rates, restraint positions, and face sheet thicknesses are investigated by three-point bending tests. It is found that the improved SR material interpolation model is efficient for suppressing the grid dependence and checkerboard, and the mechanical properties of optimized quasi-honeycomb sandwich structures are significantly enhanced in comparison with original structures, confirming that the developed method provides important guidance for designing and optimizing the quasi-honeycomb sandwich structure.

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Flexural properties and failure mechanism of 3D-printed grid beetle elytron plates

Cited by 17 publications

References 56 publications

Fused-Deposition Modeling 3D Printing of Short-Cut Carbon-Fiber-Reinforced PA6 Composites for Strengthening, Toughening, and Light Weighting

Fused-Deposition Modeling 3D Printing of Short-Cut Carbon-Fiber-Reinforced PA6 Composites for Strengthening, Toughening, and Light Weighting

Structural Parameters and Comparative Analysis of the Performance of Four Beetle Elytron Plate Walls

Variable-density topology optimization and bending test of quasi-honeycomb sandwich structures

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