3D Printing Gets a Boost and Opportunities with Polymer Materials

Hofmann, Manfred

doi:10.1021/mz4006556

Cited by 189 publications

(165 citation statements)

References 6 publications

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“…The emergence of such multi-material and composite 3D printing technologies [33][34][35][36][37][38][39] facilitates the design of functionally graded designs at the sub-millimeter scale enabling fabrication of multi-material structures simultaneously exhibiting both strength and toughness, which are often difficult to achieve with homogeneous materials. [40,41] CAD models of SLJs were created using Solidworks (Dassault Systemes, France) and an Object Connex260 Polyjet 3D printer (Statasys Ltd., USA), having eight simultaneously operating print heads, was used for fabrication.…”

Section: Printing and Compliance-tailoring Of The Multimaterials Jointmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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Multilayered multi-material interfaces are encountered in an array of fields. Here, enhanced mechanical performance of such multi-material interfaces is demonstrated, focusing on strength and stiffness, by employing bondlayers with spatially-tuned elastic properties realized via 3D printing. Compliance of the bondlayer is varied along the bondlength with increased compliance at the ends to relieve stress concentrations. Experimental testing to failure of a tri-layered assembly in a single-lap joint configuration, including optical strain mapping, reveals that the stress and strain redistribution of the compliance-tailored bondlayer increases strength by 100% and toughness by 60%, compared to a constant modulus bondlayer, while maintaining the stiffness of the joint with the homogeneous stiff bondlayer. Analyses show that the stress concentrations for both peel and shear stress in the bondlayer have a global minimum when the compliant bond at the lap end comprises %10% of the bondlength, and further that increased multilayer performance also holds for long (relative to critical shear transfer length) bondlengths. Damage and failure resistance of multi-material interfaces can be improved substantially via the compliance-tailoring demonstrated here, with immediate relevance in additive manufacturing joining applications, and shows promise for generalized joining applications including adhesive bonding.

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Section: Printing and Compliance-tailoring Of The Multimaterials Jointmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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“…A marriage of nanomaterials and 3D printing could offer clear advantages and numerous new opportunities [18,19,20]. …”

Section: Introductionmentioning

confidence: 99%

In Situ Thermal Generation of Silver Nanoparticles in 3D Printed Polymeric Structures

et al. 2016

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Polymer nanocomposites have always attracted the interest of researchers and industry because of their potential combination of properties from both the nanofillers and the hosting matrix. Gathering nanomaterials and 3D printing could offer clear advantages and numerous new opportunities in several application fields. Embedding nanofillers in a polymeric matrix could improve the final material properties but usually the printing process gets more difficult. Considering this drawback, in this paper we propose a method to obtain polymer nanocomposites by in situ generation of nanoparticles after the printing process. 3D structures were fabricated through a Digital Light Processing (DLP) system by disolving metal salts in the starting liquid formulation. The 3D fabrication is followed by a thermal treatment in order to induce in situ generation of metal nanoparticles (NPs) in the polymer matrix. Comprehensive studies were systematically performed on the thermo-mechanical characteristics, morphology and electrical properties of the 3D printed nanocomposites.

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“…Thin-panel structures may lead to unwanted warping and distortion [25]. For Stereolithography rapid prototyping technology (SLA), due to the fast reaction, together with the almost unavoidable cure shrinkage and some effects caused by thermal factors, which inducing stress in the manufacturing components built up from layer to layer, will lead to notable warping and curl phenomenon [26].…”

Section: Parts Suit For Cnc Processing Productionmentioning

confidence: 99%

Design of a solar panel deployment and tracking system for Pocketqube pico-satellite

Harkness

Walkinshaw³

2017

2017 IEEE Aerospace Conference

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Abstract-Modularized small satellites will have even greater potential with better energy supply. In this paper, a PocketQube solar panel deployment and tracking system will be presented. The system is designed for a 3P PocketQubes. During the designing phase, trade-off analysis is done to meet the balance of weight, dimension and efficiency. Reliability, manufacturability, and cost are also considered from the beginning, as commercial production and launch are expected. The CAD design, dynamics analysis, motion simulation, and rendering for the project are undertaken by Solidworks, whereas Abaqus CAE is utilized for the finite element analysis of the vibration test of the panels. In the gimbal subsystem, we use two micro stepper motor to drive the panels via a two-axis gearbox, enabling the panels to track the sun omnidirectionally. In the panel subsystem, two types of customized spring hinges are designed. Robust and verified parts, such as burner resistors, are chose for the control and deployment system. After the continuous optimization process throughout the design phase, by comparing different manufacturing processes technologies, materials, and design details, the full scale prototypes of the gimbal subsystem were built and tested. In the end, the most feasible solution, as well as the suggestions for the development, were put forward.

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3D Printing Gets a Boost and Opportunities with Polymer Materials

Cited by 189 publications

References 6 publications

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

In Situ Thermal Generation of Silver Nanoparticles in 3D Printed Polymeric Structures

Design of a solar panel deployment and tracking system for Pocketqube pico-satellite

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