Shape Optimization for Additive Manufacturing of Removable Partial Dentures - A New Paradigm for Prosthetic CAD/CAM

Additive manufacturing erases the distance between design ideas and finished parts. However, designers must use several software tools to use these advantages. Moreover, these tools operate with different representations of geometry. This paper describes the architecture of a new CAD/CAM system that uses only the function representation of the geometry (FRep). It provides all widely used design operations and allows an engineer to employ robust and efficient topology optimization algorithms. The developed CAD/CAM system consists of 3D modeling, simulation, topology optimization, and direct manufacturing modules. We successfully printed designed parts and performed mechanical tests of printed parts. The results of tests show good agreement with simulation data. The system makes it possible to create structures with the desired properties in a fast and flexible way. The proposed approach significantly helps in designing additive manufacturing process and saves time for its users.

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From Sketches and Installations to Bioinspired 5D Printing Models

Advances in Civil and Industrial Engineering - Handbook of Research on Developing Smart Cities Based on Digital Twins ◽

10.4018/978-1-7998-7091-3.ch017 ◽

2021 ◽

pp. 365-387

Author(s):

Silvia Titotto

Keyword(s):

Decision Making ◽

Additive Manufacturing ◽

Future Development ◽

Smart Cities ◽

Virtual Prototyping ◽

Interdisciplinary Approach ◽

Biologically Inspired ◽

Digital Twins ◽

Cad Cam ◽

The Impact

This chapter opens up discussions upon the relevance of interaction of representations and data visualization modes for smart cities design, planning, and development that occur beyond paper and computer drawing. Although many practitioners usually relate smart cities and digital twins design exclusively to CAD/CAM/CAE and BIM methods, processes, and tools, a wider pool of techniques and forms of expression might be the key to a more accurate and comprehensive way of simulating the several kinds of alterations that happen in the planned built environment. The chapter deals with the study of concepts that relate to both physical and virtual prototyping, which underlines an interdisciplinary approach to design and the impact of integrating biologically inspired principles from different backgrounds to the field of smart cities design. In this regard, biomimetics and additive manufacturing may play key roles in smart city's modeling design and the frontier technology of 5D printing reveals real-time decision-making programmable 4D printing process as a potential future development.

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Stereolithographic Additive Manufacturing of Bulky Ceramic Components with Functionally Geometric Micropattern

Additional Conferences (Device Packaging HiTEC HiTEN & CICMT) ◽

10.4071/2016cicmt-ta11 ◽

2016 ◽

Vol 2016 (CICMT) ◽

pp. 000001-000005

Author(s):

Soshu Kirihara

Keyword(s):

Additive Manufacturing ◽

Computer Aided Design ◽

Three Dimensional ◽

Laser Scanner ◽

Porous Electrodes ◽

Beam Diameter ◽

Cross Sectional ◽

Geometric Patterns ◽

Artificial Bones ◽

Cad Cam

Abstract In a stereolithographic additive manufacturing (AM), two dimensional (2D) cross sectional patterns were created through photo polymerization by ultraviolet laser drawing on spread resin paste including ceramic nanoparticles, and three dimensional (3D) composite models were sterically printed by layer lamination through chemical bonding. An automatic collimeter was equipped with the laser scanner to adjust beam diameter. Fine or coarse beams could realize high resolution or wide area drawings, respectively. Metal and ceramic bulky components including dendritic networks were geometrically built by using stereolithographic AM. Geometric patterns with periodic, self-similar, graded and fluctuated arrangements were created by computer aided design, manufacture and evaluation (CAD/CAM/CAE) for effective modulations of energy and material flows through dielectric lattices in photonic crystals, porous electrodes in fuel cells and biological scaffolds in artificial bones.

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CubeSat Fabrication through Additive Manufacturing and Micro-Dispensing

International Symposium on Microelectronics ◽

10.4071/isom-2011-tha4-paper3 ◽

2011 ◽

Vol 2011 (1) ◽

pp. 001021-001027 ◽

Cited By ~ 7

Author(s):

Cassie Gutierrez ◽

Rudy Salas ◽

Gustavo Hernandez ◽

Dan Muse ◽

Richard Olivas ◽

...

Keyword(s):

Additive Manufacturing ◽

Computer Aided Design ◽

Printed Circuit Boards ◽

Fused Deposition Modeling ◽

Integrated Approach ◽

Layer By Layer ◽

New Paradigm ◽

Spatial Gradients ◽

Fused Deposition ◽

On Demand

Fabricating entire systems with both electrical and mechanical content through on-demand 3D printing is the future for high value manufacturing. In this new paradigm, conformal and complex shapes with a diversity of materials in spatial gradients can be built layer-by-layer using hybrid Additive Manufacturing (AM). A design can be conceived in Computer Aided Design (CAD) and printed on-demand. This new integrated approach enables the fabrication of sophisticated electronics in mechanical structures by avoiding the restrictions of traditional fabrication techniques, which result in stiff, two dimensional printed circuit boards (PCB) fabricated using many disparate and wasteful processes. The integration of Additive Manufacturing (AM) combined with Direct Print (DP) micro-dispensing and robotic pick-and-place for component placement can 1) provide the capability to print-on-demand fabrication, 2) enable the use of micron-resolution cavities for press fitting electronic components and 3) integrate conductive traces for electrical interconnect between components. The fabrication freedom introduced by AM techniques such as stereolithography (SL), ultrasonic consolidation (UC), and fused deposition modeling (FDM) have only recently been explored in the context of electronics integration and 3D packaging. This paper describes a process that provides a novel approach for the fabrication of stiff conformal structures with integrated electronics and describes a prototype demonstration: a volumetrically-efficient sensor and microcontroller subsystem scheduled to launch in a CubeSat designed with the CubeFlow methodology.

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Shape optimization of a control arm produced by additive manufacturing with fiber reinforcement

Journal of Physics Conference Series ◽

10.1088/1742-6596/1386/1/012003 ◽

2019 ◽

Vol 1386 ◽

pp. 012003 ◽

Cited By ~ 1

Author(s):

P A Chacón Santamaría ◽

A Sierra ◽

O A González Estrada

Keyword(s):

Additive Manufacturing ◽

Shape Optimization ◽

Fiber Reinforcement

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Design and Additive Manufacturing of Lower Limb Prosthetic Socket

Volume 11: Systems, Design, and Complexity ◽

10.1115/imece2017-71494 ◽

2017 ◽

Cited By ~ 2

Author(s):

Andrea Vitali ◽

Daniele Regazzoni ◽

Caterina Rizzi ◽

Giorgio Colombo

Keyword(s):

Additive Manufacturing ◽

Lower Limb ◽

New Paradigm ◽

Prosthetic Socket ◽

Lower Limb Prosthesis ◽

Virtual Modeling ◽

High Level ◽

Inhomogeneous Properties ◽

Design And Manufacture ◽

Important Design

Additive Manufacturing (AM) is not only an innovative approach of fabrication but it fosters a new paradigm to design products. The possibility to confer inhomogeneous properties to the product provides an important design key. This paper concerns the design and manufacture of medical devices that require a high level of customization. We focus the attention on lower limb prosthesis and in particular on the prosthetic socket. The proposed method is centered on the virtual modeling of patient’s residual limb and the virtual process is highly integrated and the data flow is as fluid as possible. Three main phases can be identified: design, validation and manufacture of the socket. Firstly, the technician uses the Socket Modeling Assistant (SMA) tool to design the socket shape. Then, a numerical simulation is run to check pressure distribution and validate the socket shape. Finally, a multi-material 3D printer is used to build the socket. Preliminary results are presented and conclusions are drawn concerning the challenge of multi-material 3D printing of the socket.

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