CAE analysis on the mechanical properties of a 3D-printed lattice structure from Ti-6Al-4V for biomedical applications

PMMA, PC, and PEEK are thermoplastic polymers that possess favorable properties for biomedical applications. These polymers have been used in fields of maxillo-facial, orthopedic, intraocular surgery, and bio-implant, due to their excellent mechanical properties, osteoinductive potential, and antimicrobial capabilities. In this study, the effect of heat treatment on the mechanical properties of 3D printed polymers was characterized. By modifying printing temperature and post heat treatment process, the mechanical properties were specifically tailored for different applications, correlating with the properties of the implants that are commonly made using molding processes.

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DLP 3D Printing Meets Lignocellulosic Biopolymers: Carboxymethyl Cellulose Inks for 3D Biocompatible Hydrogels

Polymers ◽

10.3390/polym12081655 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1655 ◽

Cited By ~ 4

Author(s):

Giuseppe Melilli ◽

Irene Carmagnola ◽

Chiara Tonda-Turo ◽

Fabrizio Pirri ◽

Gianluca Ciardelli ◽

...

Keyword(s):

Mechanical Properties ◽

Additive Manufacturing ◽

3D Printing ◽

Carboxymethyl Cellulose ◽

Biomedical Applications ◽

Digital Light Processing ◽

Chemically Modified ◽

Significant Step ◽

3D Printed ◽

Biomedical Field

The development of new bio-based inks is a stringent request for the expansion of additive manufacturing towards the development of 3D-printed biocompatible hydrogels. Herein, methacrylated carboxymethyl cellulose (M-CMC) is investigated as a bio-based photocurable ink for digital light processing (DLP) 3D printing. CMC is chemically modified using methacrylic anhydride. Successful methacrylation is confirmed by 1H NMR and FTIR spectroscopy. Aqueous formulations based on M-CMC/lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) photoinitiator and M-CMC/Dulbecco’s Modified Eagle Medium (DMEM)/LAP show high photoreactivity upon UV irradiation as confirmed by photorheology and FTIR. The same formulations can be easily 3D-printed through a DLP apparatus to produce 3D shaped hydrogels with excellent swelling ability and mechanical properties. Envisaging the application of the hydrogels in the biomedical field, cytotoxicity is also evaluated. The light-induced printing of cellulose-based hydrogels represents a significant step forward in the production of new DLP inks suitable for biomedical applications.

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Effect of environment on mechanical properties of 3D printed polylactide for biomedical applications

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2019.103510 ◽

2020 ◽

Vol 102 ◽

pp. 103510 ◽

Cited By ~ 8

Author(s):

Amirpasha Moetazedian ◽

Andrew Gleadall ◽

Xiaoxiao Han ◽

Vadim V. Silberschmidt

Keyword(s):

Mechanical Properties ◽

Biomedical Applications ◽

3D Printed

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Mechanical Properties of Flexible TPU-Based 3D Printed Lattice Structures: Role of Lattice Cut Direction and Architecture

Polymers ◽

10.3390/polym13172986 ◽

2021 ◽

Vol 13 (17) ◽

pp. 2986

Author(s):

Victor Beloshenko ◽

Yan Beygelzimer ◽

Vyacheslav Chishko ◽

Bogdan Savchenko ◽

Nadiya Sova ◽

...

Keyword(s):

Mechanical Properties ◽

Lattice Structure ◽

Pore Space ◽

Thermoplastic Polyurethane ◽

Bending Tests ◽

Three Point Bending ◽

Lattice Materials ◽

3D Printed ◽

Anisotropy Of Mechanical Properties

This study addresses the mechanical behavior of lattice materials based on flexible thermoplastic polyurethane (TPU) with honeycomb and gyroid architecture fabricated by 3D printing. Tensile, compression, and three-point bending tests were chosen as mechanical testing methods. The honeycomb architecture was found to provide higher values of rigidity (by 30%), strength (by 25%), plasticity (by 18%), and energy absorption (by 42%) of the flexible TPU lattice compared to the gyroid architecture. The strain recovery is better in the case of gyroid architecture (residual strain of 46% vs. 31%). TPUs with honeycomb architecture are characterized by anisotropy of mechanical properties in tensile and three-point bending tests. The obtained results are explained by the peculiarities of the lattice structure at meso- and macroscopic level and by the role of the pore space.

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Mechanical properties of an improved 3D-printed rhombic dodecahedron stainless steel lattice structure of variable cross section

International Journal of Mechanical Sciences ◽

10.1016/j.ijmecsci.2018.07.006 ◽

2018 ◽

Vol 145 ◽

pp. 53-63 ◽

Cited By ~ 36

Author(s):

Xiaofei Cao ◽

Shengyu Duan ◽

Jun Liang ◽

Weibin Wen ◽

Daining Fang

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Cross Section ◽

Lattice Structure ◽

Variable Cross Section ◽

Variable Cross ◽

Rhombic Dodecahedron ◽

3D Printed

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Effect of Infill Pattern and Lattice Structure on the Mechanical Properties of 3D Printed Metal Polylactide Filament

Journal of Physics Conference Series ◽

10.1088/1742-6596/2120/1/012019 ◽

2021 ◽

Vol 2120 (1) ◽

pp. 012019

Author(s):

Rishitena Umapathi ◽

Joon Hoong Lim

Keyword(s):

Mechanical Properties ◽

Material Properties ◽

Lattice Structure ◽

Test Method ◽

Stress And Strain ◽

Copper Metal ◽

Grid Pattern ◽

Strain Data ◽

3D Printed ◽

Printing Speed

Abstract The purpose of this given research is to study the mechanical properties of the printed metal polylactide filament due to the recent growth of 3D printing technology. It had been widely used in many industries, but some consequences influence the material properties of printed parts and cause anisotropy. The consequences mentioned are based on parameters that have been involved in causing changes in the mechanical properties of the printed specimen such as the infill pattern, infill density, printing temperature, surrounding temperature, printing orientation, and printing speed. This paper will emphasize more on the infill patterns and choosing the better infill pattern for a printed material using copper metal polylactide (PLA) filament in terms of better strength. The strength of the printed material can be analysed using the tensile test method according to ASTM D68-10 standards. so that Young’s Modulus can be evaluated based on stress and strain data collected from each specimen that has been tested. This experiment is conducted twice using PLA and copper metal PLA whereby the PLA is used as a comparison towards copper metal PLA. Based on previous studies shows honeycomb has the strongest infill pattern but after running through the certain test it is found out that grid pattern has the qualities for FDM processes which will be discussed further.

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Cellulose Nanofibrils-based Hydrogels for Biomedical Applications: Progresses and Challenges

Current Medicinal Chemistry ◽

10.2174/0929867327666200303102859 ◽

2020 ◽

Vol 27 (28) ◽

pp. 4622-4646 ◽

Cited By ~ 1

Author(s):

Huayu Liu ◽

Kun Liu ◽

Xiao Han ◽

Hongxiang Xie ◽

Chuanling Si ◽

...

Keyword(s):

Mechanical Properties ◽

Metal Ion ◽

Biomedical Applications ◽

Biomedical Application ◽

Cellulose Nanofibrils ◽

Wound Dressings ◽

Preparation Methods ◽

Tissue Scaffold ◽

Surface Areas ◽

Mechanical Methods

Background: Cellulose Nanofibrils (CNFs) are natural nanomaterials with nanometer dimensions. Compared with ordinary cellulose, CNFs own good mechanical properties, large specific surface areas, high Young's modulus, strong hydrophilicity and other distinguishing characteristics, which make them widely used in many fields. This review aims to introduce the preparation of CNFs-based hydrogels and their recent biomedical application advances. Methods: By searching the recent literatures, we have summarized the preparation methods of CNFs, including mechanical methods and chemical mechanical methods, and also introduced the fabrication methods of CNFs-based hydrogels, including CNFs cross-linked with metal ion and with polymers. In addition, we have summarized the biomedical applications of CNFs-based hydrogels, including scaffold materials and wound dressings. Results: CNFs-based hydrogels are new types of materials that are non-toxic and display a certain mechanical strength. In the tissue scaffold application, they can provide a micro-environment for the damaged tissue to repair and regenerate it. In wound dressing applications, it can fit the wound surface and protect the wound from the external environment, thereby effectively promoting the healing of skin tissue. Conclusion: By summarizing the preparation and application of CNFs-based hydrogels, we have analyzed and forecasted their development trends. At present, the research of CNFs-based hydrogels is still in the laboratory stage. It needs further exploration to be applied in practice. The development of medical hydrogels with high mechanical properties and biocompatibility still poses significant challenges.

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