Article
Engineering, Biomedical
N. Jayanth, K. Jaswanthraj, S. Sandeep, N. Harish Mallaya, S. Raghul Siddharth
Summary: Heat treating 3D printed parts can significantly improve their mechanical properties, especially tensile strength. Heat treatment also reduces internal stresses developed during printing and enhances the formation of bonds between filaments.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Engineering, Environmental
Meng Xiao, Yuan Yao, Chuanchuan Fan, Ziyang Xu, Yang Liu, Bo Liu, Jia Li, Xiaoping Zhang, Xin Jin, Jumin Yang, Jianhai Yang, Wenguang Liu
Summary: Mallet finger is a common athletic injury, and the current treatment involves fixing the injured finger by a splint or orthosis. This study introduces a new material and 3D printing technology for customizing patient-specific finger orthosis with high stiffness and toughness. The material can be 3D printed and attached with a wireless pulse oximeter for monitoring vital physiological signals on the injured finger.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Honglei Zhen, Bin Zhao, Long Quan, Junyu Fu
Summary: In this study, the effects of adjusting the extrusion rate, filling angle and printing orientation on the mechanical properties of 3D-printed PEEK parts were investigated. Various heat treatment conditions were also applied to adjust the crystallinity and strength. The results showed that the best mechanical performance was achieved at an extrusion rate of 1.0 times, cross-fillings with +/- 10 degrees intervals, and vertical printing. Horizontal printing reduced warpage. Additionally, both crystallinity and mechanical properties significantly improved after heat treatment, with the best state achieved after holding at 300 degrees C for 2 hours. The resulting tensile strength was close to 80% of the strength of injection-molded PEEK parts.
Article
Engineering, Manufacturing
Fernando Rivera-Lopez, Maria Hernandez-Molina, Alejandro del Medico Bravo, Maria Milagros Laz Pavon
Summary: The aim of this study was to investigate the influence of printing parameters and postprocessing on the mechanical properties of polylactic acid samples manufactured by a 3D printer. The results showed that both print orientation and annealing have significant effects on the ultimate strength, modulus of elasticity, and elongation at break of the samples.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Seyyed Mohammad Dehghan Tezerjani, Milad Sadegh Yazdi, Mohammad Hadi Hosseinzadeh
Summary: This study establishes a model using response surface methodology to control the amount of deformation in FDM printing of polylactic acid (PLA) material, achieving controllability in the 4D printing process. By predicting high-order models and calculating process control conditions, different shapes were successfully created.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Agricultural Engineering
Zechun Ren, Xinyuan Zhou, Kejiao Ding, Tong Ji, Hao Sun, Xiang Chi, Yunzhao Wei, Min Xu
Summary: This study prepared a thermal/magnetic/light-triggered multi-stimuli responsive shape memory polymer composite with excellent properties by adding magnetic nanoparticles into a polyurethane composite. The composite showed high shape recovery rate, fast response behavior, and suitability for 3D printing. Controllable external stimuli allowed for dynamic, remote, and precise control of 4D transformations. This work is significant for the design of smart materials and devices.
INDUSTRIAL CROPS AND PRODUCTS
(2024)
Article
Mechanics
Mario Bragaglia, Federico Cecchini, Lorenzo Paleari, Miriam Ferrara, Marianna Rinaldi, Francesca Nanni
Summary: In this study, the fracture mechanics of 3D-printed PLA samples were simulated using different numerical approaches, and the influence of printing parameters on mechanical properties was analyzed. The results showed that the printing direction and parameters greatly affected the mechanical response, with a tensile strength ranging from 52 MPa to 4 MPa. The performed finite element analysis accurately predicted the fracture behavior, with an error below 7%. The investigated model provides a useful analysis approach for the broader use of 3D printing in engineering applications.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Paper & Wood
Chen Wang, Zhi-yi Zhou
Summary: This study investigated the optical properties of PLA 3D printing materials and their influencing factors for personalized 3D printing PLA lampshade manufacturing. Rectangular PLA 3D printing specimens were designed and analyzed their light transmittance and haze with respect to color, layer height, and wall thickness using a UV spectrophotometer. Three lampshades were designed and fabricated using the preferred molding parameters. The results showed that milky white specimens had better light scattering and luminous uniformity, making them more suitable for 3D printing lampshade manufacturing. The effect of layer height on optical properties was insignificant, while the effect of wall thickness was significant.
Article
Chemistry, Physical
Leszek Czechowski, Slawomir Kedziora, Elvin Museyibov, Markus Schlienz, Piotr Szatkowski, Martyna Szatkowska, Jacek Gralewski
Summary: This paper analyzes the properties of printed polylactic acid (PLA) samples with different weight ratios of graphene nanopowder (GNP). Through testing the chemical-physical properties, stiffness, and strength parameters of pure PLA and admixed PLA, it was found that 1% graphene can improve the mechanical parameters of the printed composite, while increasing the graphene content reduces the measured parameter values.
Article
Materials Science, Biomaterials
Weitong Chen, Luke Nichols, Frank Brinkley, Kelson Bohna, Wenmeng Tian, Matthew W. Priddy, Lauren B. Priddy
Summary: This study conducted a series of experiments on PLA/6hAT/nHA scaffolds, and found properties beneficial for cancellous bone regeneration. The 6-hour alkali treatment improved nHA coating and hydrophilicity, reducing strut width and stiffness.
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2021)
Article
Chemistry, Physical
Zhongsen Zhang, Bingyan Cao, Ning Jiang
Summary: This study investigated the degradation behavior and mechanical properties of cellulose nanofiber (CNF)/polylactic acid (PLA) composites. The results showed that the addition of CNF accelerated the degradation rate of PLA, but also resulted in the decrease of composite strength. Furthermore, the study found that the degradation process caused notable deformation in the samples.
Article
Polymer Science
Roderik Plavec, Vojtech Horvath, Slavka Hlavacikova, Leona Omanikova, Martina Repiska, Elena Medlenova, Jozef Feranc, Jan Kruzelak, Radek Prikryl, Silvestr Figalla, Sona Kontarova, Andrej Baco, Lucia Danisova, Zuzana Vanovcanova, Pavol Alexy
Summary: This study focused on the material recycling of a biodegradable blend based on PLA and PHB. The effects of blending and multiple processing on the thermomechanical stability, molecular characteristics, and thermophysical and mechanical properties were investigated. The results showed that the material degraded during blending and multiple processing, but there was no significant change in its thermophysical properties or strength characteristics. Therefore, the biodegradable polymer blend based on PLA and PHB is a suitable candidate for material recycling in industrial processing conditions.
Article
Construction & Building Technology
Yang Zhao, Yin Chen, Zhen Wang, Jun Ye, Weijian Zhao
Summary: Wire and arc additive manufacturing (WAAM) technology is efficient for constructing large-scale components in the construction industry. However, there are uncertainties regarding the characteristics of WAAM materials and their relationship with metallographic structure, printing paths, and heat treatment. In this study, tensile tests were conducted to evaluate the mechanical properties of WAAM stainless steel, which showed good strength but slightly lower ductility compared to conventional stainless steel. Anisotropy was observed in some printing paths, and the grain size of the material was influenced by the printing path.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Zechun Ren, Xinyuan Zhou, Kejiao Ding, Tong Ji, Hao Sun, Xiang Chi, Yunzhao Wei, Min Xu, Liping Cai, Changlei Xia
Summary: This study reports the development of a sustainable polymer system with 50% lignin content. By incorporating a plasticizer, the composite material exhibits excellent flexibility and 3D printing adaptability. The biocomposites show significant improvements in elongation and toughness, with good printability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Materials Science, Composites
Junli Gao, Yan Yang, Haibing Zhang, Zhongfa Xie
Summary: In this study, PLA geogrid was prepared using 3D printing technology, and indoor tensile tests were conducted to analyze the effects of material filling ratios, material filling forms, geogrid geometries, and tensile rates on the mechanical properties of geogrids. The results showed that PLA can be used as an environmentally friendly material for making geogrids and can reflect the mechanical properties of different geogrids.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
