In this study, radial pore continuous gradient porous bone scaffolds were designed and optimized based on the Gyroid single-cell structure to meet the demand for high-performance bone implants in bone tissue engineeri...
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In this study, radial pore continuous gradient porous bone scaffolds were designed and optimized based on the Gyroid single-cell structure to meet the demand for high-performance bone implants in bone tissue engineering. Ti-6Al-4V alloy scaffolds with varying single-cell sizes and porosities were fabricated using laser powder bed fusion (PBF-LB) technology for comparative analysis. The findings revealed that the radial pore continuous gradient porous structure exhibited superior mechanical properties and permeability, coupled with a large specific surface area and a helical trajectory for fluid permeation. These features significantly enhanced cell attachment and promoted bone regeneration. The mechanical properties of the scaffolds were further refined, and their toughness was improved through heat treatment of the Ti-6Al-4V alloy. Among the tested designs, the G3-60 scaffold demonstrated the most balanced performance, achieving an elastic modulus of 8.23 GPa, a yield strength of 300.09 MPa, a maximum specific surface area of 3559.362 mm2, and a permeability of 2.984 x 10-3m2 at a flow velocity of 0.1 mm/s. This scaffold not only provides exceptional mechanical load-bearing capacity and permeability but also offers a substantial surface area to support osteoblast attachment and proliferation. These results provide critical theoretical insights and technical guidance for the future design and clinical application of advanced bone implants.
Using an electron microscope to observe the microstructure of a porcupine quills cross-section and a bionic method,a new bionicstructure was *** performance of the structure in terms of energy absorption,maximum impa...
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Using an electron microscope to observe the microstructure of a porcupine quills cross-section and a bionic method,a new bionicstructure was *** performance of the structure in terms of energy absorption,maximum impact force withstood,and impact force efficiency was evaluated using Ansys finite element simulation software to simulate the structure's *** examine the impact of ribs on the structural performance of the bionic porcupine quills,a control structure was *** to the results of the finite element simulation,the presence of ribs in the bionic porcupine quills structure can transfer stress uniformly to the overall structure and share stress for some of the rupture-prone *** reduce stress concentration in specific areas and increase the impact force efficiency of the *** SEA and IFE values of bionic porcupine quills were 30.01 kJ/kg and 84.22%,*** structure is then optimized for parameter design in order to find the optimal structure by response surface in order to improve the structure's SEA and decrease its *** order to evaluate the precision of the response surface,the optimal structure predicted is validated using finite element simulation.
Inspired by impact-resistant hedgehog spine and beetle's forewing, the thin-walled structures of simple hedgehog spine and multilevel hedgehog spine were designed. Numerical simulations of rigid flat plate impacti...
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Inspired by impact-resistant hedgehog spine and beetle's forewing, the thin-walled structures of simple hedgehog spine and multilevel hedgehog spine were designed. Numerical simulations of rigid flat plate impacting on thin-walled structures showed that the deformation coordination ability and stress distribution of the structure are improved effectively by the hedgehog spine section design. This makes the specific energy absorption of the simple hedgehog spine thin-walled structure just before failure increase to 9.6 times and 5.7 times those of the single-walled cylinder and simple spider web thin-walled structures, respectively. Furthermore, the sub-circle multilevel design was introduced to further increase the range of high strain energy density, and the specific energy absorption of the multilevel hedgehog spine thin-walled structure was 2.1 times that of the simple hedgehog spine thin-walled structure. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).
According to the fact that there need the model to simulate the biological structure and principle in the modern bionicdesign, the thought combining the reverse engineering(RE) with the bionic structure design was pu...
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ISBN:
(纸本)9783037853757
According to the fact that there need the model to simulate the biological structure and principle in the modern bionicdesign, the thought combining the reverse engineering(RE) with the bionic structure design was put forward. Taking the crab model as an example, the establishing scan model, gathering data, disposal of data, reconstructing CAD model have been explained in detail. The results indicated that reverse engineering is a very useful tool for revealing the biologically geometrical shapes and morphologies quantitatively. This work laid a basis for the RE technology applied to the bionic structure design.
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