Innovation pathways in additive manufacturing: Methods for tracing emerging and branching paths from rapid prototyping to alternative applications

Nitinol (NiTi) is categorized as a smart material which is highly recognized material for medical and other engineering applications. The behaviour of NiTi can be modified by altering the composition, modifying the porosity and applying external thermal and mechanical treatment. Due to high composition sensitivity, there are several impediments in fabrication of NiTi with conventional techniques which impel the use of additive manufacturing methods. But due to very high cost of equipments, these processes have not been commercialized till now. This paper presents a review on applications, manufacturing NiTi alloy and its various production routes from conventional to rapid prototyping, porous NiTi, effect of additives on properties of the alloy and its challenges.

Download Full-text

Rapid fabrication of MOF-based mixed matrix membranes through digital light processing

Materials Advances ◽

10.1039/d1ma00023c ◽

2021 ◽

Author(s):

Alexey Pustovarenko ◽

Beatriz Seoane ◽

Edy Abou-Hamad ◽

Helen E King ◽

Bert Weckhuysen ◽

...

Keyword(s):

Additive Manufacturing ◽

3D Printing ◽

Processing Speed ◽

Mixed Matrix Membranes ◽

Scientific Interest ◽

Mixed Matrix ◽

Digital Light Processing ◽

Additive Manufacturing Technology ◽

Rapid Fabrication ◽

Manufacturing Methods

3D printing, also known as additive manufacturing technology, has greatly expanded across multiple sectors of technology replacing classical manufacturing methods by combining processing speed and high precision. The scientific interest...

Download Full-text

The technology of continuous fibre-reinforced polymers: a review on extrusion additive manufacturing methods

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-021-06837-6 ◽

2021 ◽

Author(s):

Chrysoula Pandelidi ◽

Stuart Bateman ◽

Sebastian Piegert ◽

Rene Hoehner ◽

Ingomar Kelbassa ◽

...

Keyword(s):

Additive Manufacturing ◽

Reinforced Polymers ◽

Continuous Fibre ◽

Manufacturing Methods

Download Full-text

Evaluation of Parts Produced by a Novel Additive Manufacturing Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.315.63 ◽

2013 ◽

Vol 315 ◽

pp. 63-67 ◽

Cited By ~ 1

Author(s):

Muhammad Fahad ◽

Neil Hopkinson

Keyword(s):

Additive Manufacturing ◽

Rapid Prototyping ◽

Manufacturing Process ◽

High Speed ◽

Three Dimensional ◽

Coordinate Measuring Machine ◽

Layer By Layer ◽

Nylon 12 ◽

Measuring Machine ◽

End Use

Rapid prototyping refers to building three dimensional parts in a tool-less, layer by layer manner using the CAD geometry of the part. Additive Manufacturing (AM) is the name given to the application of rapid prototyping technologies to produce functional, end use items. Since AM is relatively new area of manufacturing processes, various processes are being developed and analyzed for their performance (mainly speed and accuracy). This paper deals with the design of a new benchmark part to analyze the flatness of parts produced on High Speed Sintering (HSS) which is a novel Additive Manufacturing process and is currently being developed at Loughborough University. The designed benchmark part comprised of various features such as cubes, holes, cylinders, spheres and cones on a flat base and the build material used for these parts was nylon 12 powder. Flatness and curvature of the base of these parts were measured using a coordinate measuring machine (CMM) and the results are discussed in relation to the operating parameters of the process.The result show changes in the flatness of part with the depth of part in the bed which is attributed to the thermal gradient within the build envelope during build.

Download Full-text

Additive Manufacturing: The Next Generation of Scapholunate Ligament Reconstruction

Journal of Wrist Surgery ◽

10.1055/s-0041-1729993 ◽

2021 ◽

Author(s):

Matthew N. Rush ◽

Christina Salas ◽

Lorraine Mottishaw ◽

Damian Fountain ◽

Deana Mercer

Keyword(s):

Additive Manufacturing ◽

Ligament Reconstruction ◽

Three Dimensional ◽

Biological Properties ◽

Bone Interface ◽

Significant Strength ◽

Efficient Integration ◽

Manufacturing Methods ◽

Manufacturing Techniques ◽

Manufacturing Technologies

Abstract Background Ligament reconstruction, as a surgical method used to stabilize joints, requires significant strength and tissue anchoring to restore function. Historically, reconstructive materials have been fraught with problems from an inability to withstand normal physiological loads to difficulties in fabricating the complex organization structure of native tissue at the ligament-to-bone interface. In combination, these factors have prevented the successful realization of nonautograft reconstruction. Methods A review of recent improvements in additive manufacturing techniques and biomaterials highlight possible options for ligament replacement. Description of Technique In combination, three dimensional-printing and electrospinning have begun to provide for nonautograft options that can meet the physiological load and architectures of native tissues; however, a combination of manufacturing methods is needed to allow for bone-ligament enthesis. Hybrid biofabrication of bone-ligament tissue scaffolds, through the simultaneous deposition of disparate materials, offer significant advantages over fused manufacturing methods which lack efficient integration between bone and ligament materials. Results In this review, we discuss the important chemical and biological properties of ligament enthesis and describe recent advancements in additive manufacturing to meet mechanical and biological requirements for a successful bone–ligament–bone interface. Conclusions With continued advancement of additive manufacturing technologies and improved biomaterial properties, tissue engineered bone-ligament scaffolds may soon enter the clinical realm.

Download Full-text

Study Regarding the Influence of the Printing Orientation Angle on the Mechanical Behavior of Parts Manufactured by Material Jetting

Materiale Plastice ◽

10.37358/mp.21.3.5517 ◽

2021 ◽

Vol 58 (3) ◽

pp. 198-209

Author(s):

Vasile Cojocaru ◽

Doina Frunzaverde ◽

Dorian Nedelcu ◽

Calin-Octavian Miclosina ◽

Gabriela Marginean

Keyword(s):

Additive Manufacturing ◽

Rapid Prototyping ◽

Tensile Test ◽

Mechanical Behavior ◽

Process Parameters ◽

Orientation Angle ◽

Tensile Tests ◽

Anisotropic Behavior ◽

Optimization Of Process Parameters ◽

Printed Materials

Initially developed as a rapid prototyping tool for project visualization and validation, the recent development of additive manufacturing (AM) technologies has led to the transition from rapid prototyping to rapid manufacturing. As a consequence, increased attention has to be paid to the mechanical, chemical and physical properties of the printed materials. In mechanical engineering, the widespread use of AM technologies requires the optimization of process parameters and material properties in order to obtain components with high, repeatable and time-stable mechanical properties. One of the main problems in this regard is the anisotropic behavior of components made by additive manufacturing, determined by the type of material, the 3D printing technology, the process parameters and the position of the components in the printing space. In this paper the influence of the printing orientation angle on the tensile behavior of specimens made by material jetting is investigated. The aim was to determine if the positioning of components at different angles relative to the X-axis of the printer (and implicitly in relation to the multijet printing head) contributes to anisotropic behavior. The material used was a photopolymer with a mechanical strength between 40 MPa and 55 MPa, according to the producer. Four sets of tensile test specimens were manufactured, using flat build orientation and positioned on the printing table at angles of 0˚, 30˚, 60˚ and 90˚ to the X-axis of the printer. Comparative analysis of the mechanical behavior was carried out by tensile tests and microscopic investigations of the tensile test specimens fracture surfaces.

Download Full-text

3D Digitization and Additive Manufacturing Technologies in Medicine

Research Papers Faculty of Materials Science and Technology Slovak University of Technology ◽

10.2478/rput-2018-0020 ◽

2018 ◽

Vol 26 (42) ◽

pp. 165-170

Author(s):

Ivan Molnár ◽

Ladislav Morovič

Keyword(s):

Additive Manufacturing ◽

Manufacturing Processes ◽

Design And Manufacturing ◽

Medical Aids ◽

Manufacturing Methods ◽

Manufacturing Technologies ◽

Design And Manufacture ◽

3D Digitization ◽

The Given

Abstract The paper discusses the use of 3D digitization and additive manufacturing technologies in the field of medicine. In addition, applications of the use of 3D digitization and additive manufacturing methods are described, focusing on the design and manufacture of individual medical aids. Subsequently, the process of designing and manufacturing of orthopedic aids using these technologies is described and the advantages of introducing the given technologies into the design and manufacturing processes in the medicine sector are presented.

Download Full-text