Results 21 to 30 of about 12,905 (249)

On the toughness of thermoplastic polymer nanocomposites as assessed by the essential work of fracture (EWF) approach [PDF]

open access: yes, 2013
The essential work of fracture (EWF) approach is widely used to determine the plane stress fracture toughness of highly ductile polymers and related systems.
A. Pegoretti   +6 more
core   +1 more source

Optimizing 3D printing parameters for PLA and PETG: advancing high-quality skull implant production [PDF]

open access: yesEngineering and Technology Journal
This study investigates the mechanical performance of 3D-printed polylactic acid and polyethylene terephthalate glycol materials by examining the effects of three crucial printing parameters (layer thickness, infill density, and infill pattern).
Reem Khzzal, Marwan Nafaa, Wisam Hamdan
doaj   +1 more source

Performance Evaluation of Carbon Fiber Reinforced with Polyethylene Terephthalate Glycol (PETG) in Additive Manufacturing [PDF]

open access: yesE3S Web of Conferences
This research worked on the mechanical properties of Carbon Fiber Reinforced Polyethylene Terephthalate Glycol (PETG) for applications in 3D printing. Carbon fiber reinforcement was incorporated into PETG and pellets as the base material.
Nerella Mary Jasmin   +6 more
doaj   +1 more source

Mechanical properties and numerical simulation of FDM 3D printed PETG/carbon composite unit structures

open access: yesJournal of Materials Research and Technology, 2023
Carbon fibers (CFs) were used as reinforcement in developing a polyethylene terephthalate glycol (PETG)-based polymer composite using the fused deposition modeling (FDM) 3D printing technique.
Ibrahim M. Alarifi
doaj   +1 more source

Resistance of PETG Materials on Thermocycling and Brushing

open access: yesDentistry Journal, 2023
The aim was to assess the impact of thermocycling and brushing on the surface roughness and mass of PETG material—the most commonly used for orthodontic retainers. A total of 96 specimens were exposed to thermocycling and brushing with three different kinds of toothbrushes depending on the number and thickness of the bristles.
Luka Šimunović   +2 more
openaire   +4 more sources

Use of endospore-forming bacteria as an active oxygen scavenger in plastic packaging materials [PDF]

open access: yes, 2011
In this study the use of heat resistant endospore-forming aerobic microorganisms of the genus Bacillus amyloliquefaciens as an active oxygen scavenger in multilayer PET bottles was evaluated.
Anthierens, Tom   +11 more
core   +2 more sources

3-D Printed Protective Equipment during COVID-19 Pandemic [PDF]

open access: yes, 2020
While the number of coronavirus cases from 2019 continues to grow, hospitals are reporting shortages of personal protective equipment (PPE) for frontline healthcare workers.
Fretwurst, Tobias   +7 more
core   +1 more source

Thin-Shell Deployable Reflectors with Collapsible Stiffeners: Experiments and Simulations [PDF]

open access: yes, 2012
This paper presents an experimental and computational study of four deployable reflectors with collapsible edge stiffeners, to verify the differences in behavior that had been predicted in a previous theoretical study.
Pellegrino, Sergio, Tan, Lin Tze
core   +1 more source

Methods of Parallel Voxel Manipulation for 3D Digital Printing [PDF]

open access: yes, 2007
A novel digital printing concept is explored for desktop fabrication of multimaterial objects with arbitrary 3D geometry. Digital objects are composed of many discrete, self-aligning voxels instead of continuous (analog) deposition techniques.
Hiller, Jonathan, Lipson, Hod
core   +1 more source

Genes Translocated into the Plastid Inverted Repeat Show Decelerated Substitution Rates and Elevated GC Content. [PDF]

open access: yes, 2016
Plant chloroplast genomes (plastomes) are characterized by an inverted repeat (IR) region and two larger single copy (SC) regions. Patterns of molecular evolution in the IR and SC regions differ, most notably by a reduced rate of nucleotide substitution ...
Kuo, Li-Yaung   +3 more
core   +1 more source

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