Flexural properties of porcupine quill-inspired sandwich panels

Tee, Yun Lu; Nguyen‐Xuan, H.; Tran, Phuong

doi:10.1088/1748-3190/acd096

Cited by 4 publications

(2 citation statements)

References 56 publications

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“…In addition to designing cores composed of honeycomb structures [5][6][7][8], auxetic structures [9][10][11], and lattice structures [2,4,12], learning from biological structure such as Cybister beetles [13], glass sponges [14], and dactyl's club [15] is another effective tool to develop novel infilling patterns of the beam design. Among these bio-inspiration resources, porcupine quill, which is composed of a stiff shell and foamy infillings, is regarded as an outstanding candidate for beam design due to its superior strength and buckling resistance [16,17].…”

Section: Introductionmentioning

confidence: 99%

Porous structures inspired by porcupine quill: multiscale design optimization approach

Lan,

Fox,

Tran

2024

Bioinspir. Biomim.

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This paper presents a novel approach for designing a fail-safe bending-resistant structure from the combination of explicit discrete component-based topology optimization and the porcupine quill-inspired features. To achieve fail-safe functionalities under classical topology optimization formulations, the method involves constructing discrete components at various scales to imitate the quill's foam-like characteristics. The components are iteratively updated, and the optimization process allows for the grading of quill-inspired features while achieving optimal structural compliance under bending loads. The proposed approach is demonstrated to be effective through the resolution of Messershmitt-Bolkow-Blohm (MBB) beam designs, parameterized studies of geometric parameters, and numerical validation of long-span and short-span quill-inspired beam designs. By examining the von Mises stress distribution, the study highlights the mitigation of material yielding brought by the geometric features of porcupine quills, leading to the potential theory support for the fail-safe capability. The optimized MBB beams are manufactured using the material extrusion (MEX) technique, and three-point bending tests are conducted to explore the failure mitigation capability of the quill-inspired beam under large deformation. Consequently, the study concludes that the proposed quill-inspired component-based topology optimization approach can design a fail-safe structure according to the improved energy absorption as well as increased deformation after reaching 75% peak load.

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Section: Introductionmentioning

confidence: 99%

Porous structures inspired by porcupine quill: multiscale design optimization approach

Lan,

Fox,

Tran

2024

Bioinspir. Biomim.

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“…Their conical design provides additional stability and support, particularly important when walking or climbing. Moreover, the quills exhibit high impact resistance due to their internal fiber structure arranged in concentric circles and interlaced in different directions, forming a very strong mesh structure that can effectively absorb and disperse external impact forces, thus ensuring the porcupine's safety and health when attacked or falling [30]. Furthermore, the conical design of porcupine quills also serves as a defense mechanism.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Characterization and Biomimetic Design of Porcupine Quills for Enhanced Mechanical Performance

Liu,

Wang,

Zhao

et al. 2024

Materials

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The mechanical properties of porcupine quills have attracted the interest of researchers due to their unique structure and composition. However, there is still a knowledge gap in understanding how these properties can be utilized to design biomimetic structures with enhanced performance. This study delves into the nanomechanical and macro-mechanical properties of porcupine quills, unveiling varied elastic moduli across different regions and cross sections. The results indicated that the elastic moduli of the upper and lower epidermis were higher at 8.13 ± 0.05 GPa and 7.71 ± 0.14 GPa, respectively, compared to other regions. In contrast, the elastic modulus of the mid-dermis of the quill mid-section was measured to be 7.16 ± 0.10 GPa. Based on the micro- and macro-structural analysis of porcupine quills, which revealed distinct variations in elastic moduli across different regions and cross sections, various biomimetic porous structures (BPSs) were designed. These BPSs were inspired by the unique properties of the quills and aimed to replicate and enhance their mechanical characteristics in engineering applications. Compression, torsion, and impact tests illustrated the efficacy of structures with filled hexagons and circles in improving performance. This study showed enhancements in maximum torsional load and crashworthiness with an increase in filled structures. Particularly noteworthy was the biomimetic porous circular structure 3 (BPCS_3), which displayed exceptional achievements in average energy absorption (28.37 J) and specific energy absorption (919.82 J/kg). Finally, a response surface-based optimization method is proposed to enhance the design of the structure under combined compression-torsion loads, with the goal of reducing mass and deformation. This research contributes to the field of biomimetics by exploring the potential applications of porcupine quill-inspired structures in fields such as robotics, drive shafts, and aerospace engineering.

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Enhancing auxetic gradient structures for hip joint implants to optimize stress shielding reduction

Mohammadi Ghalehney,

Sadeghi,

Barati

et al. 2024

Phys. Scr.

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This study explores the design and optimization of a porous hip implant to reduce stress shielding. The initial section of the research focused on determining the elastic modulus of a three-dimensional auxetic structure, mainly in the y-direction. Various methods, including numerical, analytical, and experimental approaches, were employed to evaluate the elastic properties of this structure. Samples were manufactured using additive manufacturing, and their elastic properties were measured through compression testing. Impressively, the results showed a strong agreement between the elastic modulus obtained from simulations and experimental tests in the y direction. To enhance the implant's performance and reduce stress shielding at the-implant-bone interface, a gradient structure was introduced. This gradient structure was designed to gradually increase the elastic modulus away from the bone contact surfaces while closely matching the bone's modulus at the interface. The elastic modulus of this gradient structure was calculated using Abaqus software and the analytical method using MATLAB, with a small 4.8% disparity between the two methods, indicating a high level of agreement. As a result, the genetic algorithm successfully generated a porous hip implant designed to reduce stress shielding throughout its structure. This innovative approach, combining numerical, analytical, and experimental techniques, and gradient structures, promises to improve the performance of hip implants and enhance patient outcomes by reducing the risk of stress-shielding complications.shielding complications.

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Flexural properties of porcupine quill-inspired sandwich panels

Cited by 4 publications

References 56 publications

Porous structures inspired by porcupine quill: multiscale design optimization approach

Porous structures inspired by porcupine quill: multiscale design optimization approach

Multiscale Characterization and Biomimetic Design of Porcupine Quills for Enhanced Mechanical Performance

Enhancing auxetic gradient structures for hip joint implants to optimize stress shielding reduction

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