scholarly journals Design and Experimental Characterization of Hydraulically-actuated Revolute Joint based on Multimaterial Additive Manufacturing

2021 ◽  
pp. 1-10
Author(s):  
Antoine Pfeil ◽  
Marius Siegfarth ◽  
Tim Philipp Pusch ◽  
Laurent Barbé ◽  
François Geiskopf ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Range Of Motion ◽  
Joint Rotation ◽  
Innovative Design ◽  
Revolute Joint ◽  
Hydraulically Actuated ◽  
Compliant Joint ◽  
Fluidic Actuators ◽  
Gear Geometry

Abstract Design of fluidic actuators remain challenging in specific contexts such as the medical field, when solutions have for instance to be compatible with the stringent requirements of magnetic resonance imaging. In this paper, an innovative design of hydraulically-actuated revolute joint is introduced. The design originality is linked to the use of multimaterial additive manufacturing for its production. Hydraulic actuation and polymer manufacturing are selected to have compatibility with the medical context. A design taking advantage of the process capabilities is proposed. The proposed component associates a large stroke compliant revolute joint and miniature pistons. An helical rack-and-pinion mechanism is integrated to the compliant joint to control the joint rotation. A specific gear geometry is elaborated to minimize the joint size. It is experimentally characterized in terms of range of motion, stiffness and available torque, to discuss the suitability of the component as a fluidic actuator. The component offers an interesting compactness, range of motion and the process is shown to be adequate for the design of functional systems.

scholarly journals Characterization of a High Temperature Ceramics Produced via Two-Step Additive Manufacturing

Open Ceramics ◽  
2021 ◽  
pp. 100165
Author(s):  
Sergey N. Golubev ◽  
Olga Yu. Kurapova ◽  
Ivan Yu. Archakov ◽  
Vladimir G. Konakov
Keyword(s):  
High Temperature ◽  
Additive Manufacturing

scholarly journals Fatigue characterization of Titanium Ti-6Al-4V samples produced by Additive Manufacturing

2016 ◽  
Vol 2 ◽  
pp. 3168-3176 ◽  
Author(s):  
Victor Chastand ◽  
Astrid Tezenas ◽  
Yannick Cadoret ◽  
Philippe Quaegebeur ◽  
Wilson Maia ◽  
...  
Keyword(s):  
Additive Manufacturing

scholarly journals Automated Testing and Characterization of Additive Manufacturing (ATCAM)

2021 ◽  
Author(s):  
Arash Alex Mazhari ◽  
Randall Ticknor ◽  
Sean Swei ◽  
Stanley Krzesniak ◽  
Mircea Teodorescu
Keyword(s):  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Cell System ◽  
Automated Testing ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Machine Calibration

AbstractThe sensitivity of additive manufacturing (AM) to the variability of feedstock quality, machine calibration, and accuracy drives the need for frequent characterization of fabricated objects for a robust material process. The constant testing is fiscally and logistically intensive, often requiring coupons that are manufactured and tested in independent facilities. As a step toward integrating testing and characterization into the AM process while reducing cost, we propose the automated testing and characterization of AM (ATCAM). ATCAM is configured for fused deposition modeling (FDM) and introduces the concept of dynamic coupons to generate large quantities of basic AM samples. An in situ actuator is printed on the build surface to deploy coupons through impact, which is sensed by a load cell system utilizing machine learning (ML) to correlate AM data. We test ATCAM’s ability to distinguish the quality of three PLA feedstock at differing price points by generating and comparing 3000 dynamic coupons in 10 repetitions of 100 coupon cycles per material. ATCAM correlated the quality of each feedstock and visualized fatigue of in situ actuators over each testing cycle. Three ML algorithms were then compared, with Gradient Boost regression demonstrating a 71% correlation of dynamic coupons to their parent feedstock and provided confidence for the quality of AM data ATCAM generates.

Design for Additive Manufacturing Inspired by TRIZ

2018 ◽  
Author(s):  
Jared Gross ◽  
Kijung Park ◽  
Gül E. Okudan Kremer
Keyword(s):  
Additive Manufacturing ◽  
Design Decision ◽  
Design For Additive Manufacturing ◽  
Specific Design ◽  
Innovative Design ◽  
Creative Solutions ◽  
Design Solutions ◽  
Manufacturing Techniques ◽  
Effective Design ◽  
Matrix Case

With the rise in popularity of additive manufacturing (AM), relevant design methodologies have become necessary for designers to reap the full benefits from this technology. TRIZ is a problem-solving tool developed to assist with innovative and creative solutions. This paper aims to create a new TRIZ matrix specifically developed for designers using additive manufacturing. The TRIZ matrix offers designers general innovative design solutions to improve specific features of a design while not sacrificing the effectiveness of other features. The proposed matrix can help effective design decision making for additive manufacturing in an early design process as well as a redesign process. Also, a design for additive manufacturing (DfAM) worksheet is provided to enable users to easily find specific design solutions for certain additive manufacturing techniques based on the general solutions derived by the TRIZ matrix. To illustrate the potential of this AM specific TRIZ matrix, case studies are presented.

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