A Bespoke Neck Orthosis for Additive Manufacturing with Improved Design Method and Sustainable Material

2021 ◽  
pp. 50-58
Author(s):  
Rita Ambu ◽  
Salvatore Massimo Oliveri ◽  
Michele Calì
Keyword(s):  
Additive Manufacturing ◽  
Design Method ◽  
Sustainable Material ◽  
Improved Design

scholarly journals A Shape Optimization Method for Part Design Derived from the Buildability Restrictions of the Directed Energy Deposition Additive Manufacturing Process

Designs ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 19
Author(s):  
Andreas K. Lianos ◽  
Harry Bikas ◽  
Panagiotis Stavropoulos
Keyword(s):  
Topology Optimization ◽  
Additive Manufacturing ◽  
Energy Deposition ◽  
Design Method ◽  
Current Trend ◽  
Internal Stresses ◽  
Material Distribution ◽  
Load Case ◽  
Design Elements ◽  
Industrial Sectors

The design methodologies and part shape algorithms for additive manufacturing (AM) are rapidly growing fields, proven to be of critical importance for the uptake of additive manufacturing of parts with enhanced performance in all major industrial sectors. The current trend for part design is a computationally driven approach where the parts are algorithmically morphed to meet the functional requirements with optimized performance in terms of material distribution. However, the manufacturability restrictions of AM processes are not considered at the primary design phases but at a later post-morphed stage of the part’s design. This paper proposes an AM design method to ensure: (1) optimized material distribution based on the load case and (2) the part’s manufacturability. The buildability restrictions from the direct energy deposition (DED) AM technology were used as input to the AM shaping algorithm to grant high AM manufacturability. The first step of this work was to define the term of AM manufacturability, its effect on AM production, and to propose a framework to estimate the quantified value of AM manufacturability for the given part design. Moreover, an AM design method is proposed, based on the developed internal stresses of the build volume for the load case. Stress tensors are used for the determination of the build orientation and as input for the part morphing. A top-down mesoscale geometric optimization is used to realize the AM part design. The DED Design for Additive Manufacturing (DfAM) rules are used to delimitate the morphing of the part, representing at the same time the freeform mindset of the AM technology. The morphed shape of the part is optimized in terms of topology and AM manufacturability. The topology optimization and AM manufacturability indicator (TMI) is introduced to screen the percentage of design elements that serve topology optimization and the ones that serve AM manufacturability. In the end, a case study for proof of concept is realized.

ANALYSIS AND SYNTHESIS OF RADIATION PATTERNS FROM CIRCULAR APERTURES

1960 ◽  
Vol 38 (1) ◽  
pp. 78-99 ◽  
Author(s):  
A. Ishimaru ◽  
G. Held
Keyword(s):  
Radiation Pattern ◽  
Traveling Wave ◽  
Design Method ◽  
Source Distribution ◽  
Circular Aperture ◽  
Narrow Beam ◽  
Wave Type ◽  
Numerical Examples ◽  
Analysis And Synthesis ◽  
Improved Design

Part I considers the problem of determining the source distribution over a circular aperture required to produce a prescribed radiation pattern. In particular, the problem of optimizing the narrow broadside pattern from a circular aperture is discussed in detail and an improved design method over Taylor's for line source is devised. Numerical examples are given.Part II deals with the analysis of the radiation pattern from a circular aperture from γ1 to γ2 with the traveling wave type source functions. Expressions suitable to the analysis and the synthesis are obtained and the narrow-beam and shaped-beam synthesis are discussed.

Improved design method for 2-arch tunnel

2007 ◽  
Author(s):  
Seok-Won Lee ◽  
Wan Gi Jeon ◽  
Kyeong-Han Jeong ◽  
Hyun-Ho Ahn ◽  
Ju Hyoung Lee
Keyword(s):  
Design Method ◽  
Improved Design

scholarly journals Modelling, Design and Validation of a Parallel Kinematic Robot for Additive Manufacture Applications

2021 ◽  
pp. 019-029
Author(s):  
Lahoud Marcel ◽  
Melendez Leonardo ◽  
Gil Arturo
Keyword(s):  
Additive Manufacturing ◽  
Open Source Software ◽  
Design Method ◽  
Kinematic Model ◽  
Additive Manufacture ◽  
Parallel Kinematics ◽  
Cartesian Space ◽  
Parallel Kinematic ◽  
Manufacturing Applications ◽  
Design Construction

The additive manufacture is a fabrication process that has taken huge steps in the last decade, even though the first researches and prototypes are around since almost forty years ago. In this article, a design method for a Parallel Kinematics Robot for Additive Manufacturing Applications is proposed. A numerical model is obtained from the kinematics of the robot for which the design, construction and assembly are planned using recycled materials and equipment. The control of the robot is done using open source software, allowing the planning of trajectories in the Cartesian space on a maximum designed cylindrical workspace of 300mm in diameter by 300mm high. At the end of the work the robot was identified, the kinematic model was validated and considerations for future works were given.

Improved design method for continuous-time quadrature bandpass ADCs

2005 ◽  
Vol 41 (8) ◽  
pp. 461 ◽  
Author(s):  
S. Reekmans ◽  
J. De Maeyer ◽  
P. Rombouts ◽  
L. Weyten
Keyword(s):  
Continuous Time ◽  
Design Method ◽  
Improved Design

scholarly journals Improved design of roller linear guide for heavy load based on finite element method and measurement

2018 ◽  
Vol 10 (9) ◽  
pp. 168781401880015
Author(s):  
Xianchun Song ◽  
Hongjian Chen ◽  
Hongkui Jiang ◽  
Xiangrong Xu ◽  
Yanfeng Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Sliding Friction ◽  
Design Method ◽  
Friction Torque ◽  
Experimental Investigations ◽  
Heavy Load ◽  
Linear Guide ◽  
Roller Guide ◽  
Element Simulation ◽  
Improved Design

Roller linear guides are key components in machine tool. The accuracy and efficiency of a machine toll are determined by the stiffness and friction torque of roller guide. This study proposes an improved design method for roller guide. The influences of the rollers profile on stiffness, stress distribution of roller linear guide are analyzed using finite element simulation. In this work, the design of the roller, slider, and the overall structure is modified. Moreover, experimental investigations on noise and sliding friction of roller linear guide are compared to validate the proposed design method. It seems that the proposed design can improve the dynamical performance of the roller linear guide.

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