Design and performance evaluation of additively manufactured composite lattice structures of commercially pure Ti (CP–Ti)

Xu, Wei; Yu, Aihua; Lu, Xin; Tamaddon, Maryam; Wang, Mengdi; Zhang, Jiazhen; Zhang, Jianliang; Qu, Xuanhui; Liu, Chaozong; Su, Bo

doi:10.1016/j.bioactmat.2020.10.005

Cited by 25 publications

(12 citation statements)

References 47 publications

(36 reference statements)

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“…Their results demonstrated that the optimized honeycomb structures had much lower stress and deformation. Xu et al (2021) investigated six composite lattice structures with different support radii consisting of simple cubic, body-centered cubic (BCC), and edge-centered cubic cells. Luxner et al (2007) and Han et al (2017) also suggested that BCC structures can have relatively higher porosity controllability and better mechanical properties than other structures.…”

Section: Introductionmentioning

confidence: 99%

Parametric Design of Hip Implant With Gradient Porous Structure

Gao

Zhao

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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Patients who has been implanted with hip implant usually undergo revision surgery. The reason is that high stiff implants would cause non-physiological distribution loadings, which is also known as stress shielding, and finally lead to bone loss and aseptic loosening. Titanium implants are widely used in human bone tissues; however, the subsequent elastic modulus mismatch problem has become increasingly serious, and can lead to stress-shielding effects. This study aimed to develop a parametric design methodology of porous titanium alloy hip implant with gradient elastic modulus, and mitigate the stress-shielding effect. Four independent adjustable dimensions of the porous structure were parametrically designed, and the Kriging algorithm was used to establish the mapping relationship between the four adjustable dimensions and the porosity, surface-to-volume ratio, and elastic modulus. Moreover, the equivalent stress on the surface of the femur was optimized by response surface methodology, and the optimal gradient elastic modulus of the implant was obtained. Finally, through the Kriging approximation model and optimization results of the finite element method, the dimensions of each segment of the porous structure that could effectively mitigate the stress-shielding effect were determined. Experimental results demonstrated that the parameterized design method of the porous implant with gradient elastic modulus proposed in this study increased the strain value on the femoral surface by 17.1% on average. Consequently, the stress-shielding effect of the femoral tissue induced by the titanium alloy implant was effectively mitigated.

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Section: Introductionmentioning

confidence: 99%

Parametric Design of Hip Implant With Gradient Porous Structure

Gao

Zhao

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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“…FEA is commonly used for simulating the experimental process and validating testing results. Researchers usually conducted FEA for performance evaluation [50][51][52], structure design [53], investigating configurational effects [54], and studying the failure mechanism [55,56]. Digital image correlation (DIC) is a 3D, full-field, non-contact optical technique to measure contour, deformation, vibration, and strain on almost any material.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Compressive and Tensile Behavior of Stainless Steel/Dissolvable Aluminum Bimetallic Composites by Finite Element Modeling and Digital Image Correlation

Ghasri-Khouzani

Bogno

et al. 2021

Materials

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This study reports fabrication, mechanical characterization, and finite element modeling of a novel lattice structure based bimetallic composite comprising 316L stainless steel and a functional dissolvable aluminum alloy. A net-shaped 316L stainless steel lattice structure composed of diamond unit cells was fabricated by selective laser melting (SLM). The cavities in the lattice structure were then filled through vacuum-assisted melt infiltration to form the bimetallic composite. The bulk aluminum sample was also cast using the same casting parameters for comparison. The compressive and tensile behavior of 316L stainless steel lattice, bulk dissolvable aluminum, and 316L stainless steel/dissolvable aluminum bimetallic composite is studied. Comparison between experimental, finite element analysis (FEA), and digital image correlation (DIC) results are also investigated in this study. There is no notable difference in the tensile behavior of the lattice and bimetallic composite because of the weak bonding in the interface between the two constituents of the bimetallic composite, limiting load transfer from the 316L stainless steel lattice to the dissolvable aluminum matrix. However, the aluminum matrix is vital in the compressive behavior of the bimetallic composite. The dissolvable aluminum showed higher Young’s modulus, yield stress, and ultimate stress than the lattice and composite in both tension and compression tests, but much less elongation. Moreover, FEA and DIC have been demonstrated to be effective and efficient methods to simulate, analyze, and verify the experimental results through juxtaposing curves on the plots and comparing strains of critical points by checking contour plots.

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“…The relative density of the samples was determined in accordance with the ASTM B962‐14 standard. [ 17,18 ] The characterization process involved the following steps: first, the sample was put in a closed container and vacuum for about 30 min to reach a certain degree of vacuum. Then, inject water into the closed container and continue to vacuum for another 30 min.…”

Section: Methodsmentioning

confidence: 99%

Manufacture and Mechanical Properties of Batwing‐Type Al Cellular Metamaterials by Selective Laser Melting

Yuan

Zhu

et al. 2023

Adv Eng Mater

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Designing metallic cellular structures with triply periodic minimal surfaces (TPMS) is a novel approach for preparing multifunctional and lightweight metamaterials. TPMS‐structured Batwing Al cellular metamaterials are fabricated using selective laser melting. The mechanical performance, failure/deformation modes, and energy absorption capacity of the metamaterials are investigated. It is demonstrated in experimental results that the unit cell structure has a significant influence on the mechanical properties of the metamaterials, and that the sample with large wall thickness exhibits excellent mechanical properties and energy absorption capacity. Furthermore, the Gibson–Ashby equation is developed to estimate the mechanical properties of the Batwing‐type Al cellular metamaterials. Herein, a theoretical foundation is provided in these findings for the engineering application of phase‐pure Al, which is typically unsuitable as a structural material due to its low yield strength.

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Design and performance evaluation of additively manufactured composite lattice structures of commercially pure Ti (CP–Ti)

Cited by 25 publications

References 47 publications

Parametric Design of Hip Implant With Gradient Porous Structure

Parametric Design of Hip Implant With Gradient Porous Structure

Investigation of Compressive and Tensile Behavior of Stainless Steel/Dissolvable Aluminum Bimetallic Composites by Finite Element Modeling and Digital Image Correlation

Manufacture and Mechanical Properties of Batwing‐Type Al Cellular Metamaterials by Selective Laser Melting

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