Compressive performance and fracture mechanism of bio-inspired heterogeneous glass sponge lattice structures manufactured by selective laser melting

He, Meng; Li, Yan; Yin, Junhui; Sun, Qinglei; Xiong, Wei; Li, Simeng; Yang, Lei; Liu, Hao

doi:10.1016/j.matdes.2022.110396

Cited by 47 publications

(19 citation statements)

References 48 publications

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“…The simulation is carried out in static general module, base material parameters for Ti-6Al-4V materials are used from reference. 48 Elastic modulus = 107 GPa, yield strength = 1019 MPa, Poisson's ratio = 0.34, and density = 4.43 g/cm 3 are considered in this study. To reduce the computational time, simulation is carried out only at amplitude = 1.5 mm, and number of cycles for fatigue testing is considered as 10 3 .…”

Section: Resultsmentioning

confidence: 99%

“…Two thin tubes with similar overall dimensional parameters and strut thickness, except different number of unit cells along the loading direction are used to visualize the effect of number of unit cells on the stress distribution. The simulation is carried out in static general module, base material parameters for Ti‐6Al‐4V materials are used from reference 48 . Elastic modulus = 107 GPa, yield strength = 1019 MPa, Poisson's ratio = 0.34, and density = 4.43 g/cm 3 are considered in this study.…”

Section: Resultsmentioning

confidence: 99%

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Effect of heat treatment on the variable amplitude fatigue life and microstructure of the novel bioinspired Ti‐6Al‐4V thin tubes fabricated using Selective Laser Melting process

Sharma

Hiremath

Kenchappa

2022

Fatigue Fract Eng Mat Struct

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In this study, thin tubes are mimicked based on the architecture of Euplectella aspergillum and studied for fatigue performance under variable amplitude loading. The thin tubes are fabricated with Ti-6Al-4V material using the selective laser melting (SLM) process. SLM printed components are always subjected to residual stresses, which can reduce fatigue performance of the components. Heat treatment effect on the fatigue performance, microstructure, and residual stress is studied. Complex geometry and sharp corners in the bioinspired tubes result in stress concentration, which further reduces the fatigue performance. The value of residual stresses at the sharp corners is dependent on the height of the tube, thickness of struts, and intersection of different struts. Heat treatment significantly reduces the residual stresses and increases the fatigue life of the thin tubes; however, strength decreases after heat treatment. Heat-treated thin tubes showed a higher concentration of (α + β) phase, which results in decreased residual stress and improved ductility of the thin tubes. Advanced bionic thin tubes can be used for lightweight crash boxes, sandwich panels, bio-implants, grid stiffened structures, etc.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effect of heat treatment on the variable amplitude fatigue life and microstructure of the novel bioinspired Ti‐6Al‐4V thin tubes fabricated using Selective Laser Melting process

Sharma

Hiremath

Kenchappa

2022

Fatigue Fract Eng Mat Struct

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“…[27,28] More recently, bioinspired cellular materials have been fabricated using additive techniques with desirable energy absorption characteristics. [29][30][31] While these other types of cellular materials are not investigated in detail here, the framework developed in this work is generally applicable to analyze any lattice stress-strain relationship, including the oscillation models and methods to extract material properties. As an example, the LEO model is fit to a gyroid structure [32] formed from a triply periodic minimal surface rather than truss elements and the results are shown in Figure S5, Supporting Information.…”

Section: Post-yield Stress Collapsementioning

confidence: 99%

A Semiempirical Model for Post‐Yield Stress Instability in the Stress–Strain Response of 3D Lattice Structures under Compressive Loads

2023

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Mechanical behavior of lattice structures is important for a range of engineering applications. Herein, a new semiempirical model is proposed that describes the entire range of stress–strain response of lattice structures, including the stress‐instability region which is modeled as an oscillator. The model can be fit to individual stress–strain curves to extract elastic modulus, yield stress, collapse stress, post‐yield collapse ratio, densification strain, and the energy absorbed per unit volume. The model is fit to 119 unique experimental stress–strain curves from 13 research papers in literature covering four different lattice designs, namely, octet truss, body‐centered cubic with vertical members, body‐centered cubic, and hexagonal. Manufacturing methods (additive and conventional) and materials (metals and polymers) were also included in the analysis. The fitted model yields several new insights into the compression behavior of previously tested lattice structures and can be applied to additional lattice designs. Among other results, analysis of variance (ANOVA) reveals that the octet truss lattice demonstrates the highest post‐yield collapse ratio and the smallest normalized energy absorption per unit volume amongst the lattice structures investigated. The proposed model is a powerful tool for designers to quantitatively compare and select 3D lattice structures with the desired mechanical characteristics.

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“…Manufacturing compatibility of 3D printing with a vast range of materials like thermoplastic polymers, metals, composites, ceramics and biomaterials allows the use of TO for different medical traits such as orthotics, organ transplant, dentistry, prosthetics, medicine and rehabilitation (Gibson et al, 2021;Haghdadi et al, 2021;Mohammed et al, 2017Mohammed et al, , 2021. The bio-inspired glass sponge structures can aid orthotic appliances with flexural resistivity, biomimetic anatomical functionality and strengthening characteristics, which can be solved with TO physics enabling the splints to be more realistic and performance-oriented (He et al, 2022;Li and Sun, 2022). Fernandes et al (2021) exercised an interdisciplinary mechanical testing and simulation-based approach to explore the buckling resistance of reinforced sponge structures using the efficacy of hybrid optimization algorithms on 3D-printed test specimens.…”

Section: Introductionmentioning

confidence: 99%

Multidisciplinary topology and material optimization approach for developing patient-specific limb orthosis using 3D printing

Kumar

Chhabra

2023

RPJ

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Purpose This study aims to explore the potential benefits favoring the adaptation of structural optimization techniques in the additive manufacturing (AM) of medical utilities to meet the repetitive demand for functionally precise customized orthoses. Irregularities encountered during the conventional treatment of tendon injuries can be eschewed using advanced structural simulation in design and innovative splint fabrication using 3D printing. Design/methodology/approach A customized mallet finger splint designed from 3D scans was subjected to ANSYS topological simulation comprising multi-level weight reduction to retain optimal mass (100%, 90%, 80%, 70% and 60%). A batch of the four typical 3D printing materials was chosen to conduct a comparative mechanical and thermal stress analysis, facilitating the selection of the optimal one for fabricating functionally adaptive splints. Assurance of structural safety was accomplished through the experimental validation of simulation results against the testing data set of ASTM D695 and ASTM D638 Type-1 specimens over a universal testing machine (UTM). Fused deposition modeling (FDM) 3D printing processed the optimized splint fabrication to assist evaluation of weight reduction percentage, fitting aesthetics, appearance, comfort, practicality and ventilation ease at the user end. Findings AM efficacy can efficiently execute the design complexity involved in the topology optimization (TO) results and introduces rehabilitation practicality into the application. Topologically optimized splint provided with favorable comfort, stiffness and strengthening features, offers ventilation ease and structural stability for customized appliances, with 30.52% lighter weight and 121.37% faster heat dissipation than unoptimized one. Originality/value The state of art multidisciplinary optimization featured with structural and material optimization attributes can deliberately meet medical necessity for performance-oriented orthotic devices.

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Compressive performance and fracture mechanism of bio-inspired heterogeneous glass sponge lattice structures manufactured by selective laser melting

Cited by 47 publications

References 48 publications

Effect of heat treatment on the variable amplitude fatigue life and microstructure of the novel bioinspired Ti‐6Al‐4V thin tubes fabricated using Selective Laser Melting process

Effect of heat treatment on the variable amplitude fatigue life and microstructure of the novel bioinspired Ti‐6Al‐4V thin tubes fabricated using Selective Laser Melting process

A Semiempirical Model for Post‐Yield Stress Instability in the Stress–Strain Response of 3D Lattice Structures under Compressive Loads

Multidisciplinary topology and material optimization approach for developing patient-specific limb orthosis using 3D printing

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