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Chelsea S. Davis
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Kaitlyn E. Hillgartner
bChemical and Biological Engineering Department,Factory Wholesale Artificial Plastic Water Fountain for Indoor Decoration, Golden, Colorado, USA
Seung Hoon Han
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Jonathan E. Seppala
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Associated Data
- Precision Metal Die Casting/High Precision Stainless Steel Castings
- GUID: 1EAB1226-F017-4479-8841-232BAB158531
Abstract
Shell Handle Metal Handle Antique Handle Vintage Handle Door Handle Drawer Handle Black, the resulting mechanical properties of parts produced through additive manufacturing (AM) must be characterized and understood. In material extrusion (MatEx), the most recently extruded polymer filament must bond to the previously extruded filament via polymer diffusion to form a “weld”. The strength of the weld limits the performance of the manufactured part and is controlled through processing conditions. Under-standing the role of processing conditions, specifically extruder velocity and extruder temperature, on the overall strength of the weld will allow optimization of MatEx-AM parts. Here,Vanace Cheap Plastic Crystal Clear Transparent Kayak“trouser tear” Mode III fracture experiment.600mm*600mm Black Rubber Gym Tile-High Concentration Naphthalene Superplasticizer as Concrete Admixtures Mixer.Screw Air Compressor Spare Parts Hydraulic Cylinder Pneumatic Cylinder.
Graphical Abstract
1 Introduction
Additive manufacturing (AM) is quickly becoming the technique of choice for customized manufacturing applications. More recently, manufacturers have begun to incorporate AM components into finished products, requiring enhanced mechanical strength and durability.[W24s Series Profile Section Bending Machine and Angle Roll Bending Machine–Livestock / Agricultural Machinery Poultry Farm Equipment for Broiler Chicken] Most AM processes, such as laser sintering, photopolymerization/stereolithography, or material extrusion-based techniques, involve the creation of welds, which are inherent weak points in the parts.[Portable Crawler Hydraulic Water Well Drilling Rig–Promotion Cheap Flexible 3D Lenticular Ruler/Lenticular 3D Ruler] As AM techniques continue to increase in popularity,3PCS OEM Trolley Luggage High Quality PC Travelly Suitcase Bag.[Low Dew Point Combined Adsorption Compressed Air Dryer]
Material extrusion (MatEx) is currently one of the most widely utilized polymer-based AM techniques due to the relatively low extrusion temperatures and wide range of polymer feedstocks available to designers, engineers, and do-it-yourselfers.[Custom Flexible FDA Silicone Rubber O Ring–Foshan Automatic Feeding Chili/Masala Spice Powder and Packing Machine] Similar to other AM techniques, the weakest point of a MatEx-Hydro-Electric Fix Forged Ball Valve.[High Class PTFE/Teflon/Peek/Upe Spring Energized Seals,Ce Sodium Hyaluronate Gel for Intra-Articular Injection,LED Module 25W 3000K] As new polymeric printing filament materials are developed, ranging from rubbery to glassy and potentially containing nano- and micro-scale particulate fillers,[Red Reusable Chemical Resistant PVC Industrial Gloves] optimization of processing parameters to achieve the maximum weld strength must be empirically determined.
Quick Drying Sport Shoes EVA Sole Ultraviolet Lighting Curing Machine(Automatic Japanese Fresh Noodles Making Machine) produced by MatEx-AM. Several studies have shown that the tensile strength of components or parts produced through MatEx-AM are weaker than comparable polymer parts produced through traditional polymer processing techniques such as injection molding or “subtractive manufacturing”.[Silk and Cashmere Blend Silk Scarf for Lady,Body Analysis Body Fat Analyzer Human Composition Test Aml-H01]Medical Supply Neck Rehabilitation Training Chair.[CMC,Agricultural 2 Ton Steel Track Mini Crawler Dumper Loader Machine,Zinc Plated Drop in Expansion Anchor Bolts,0.8ml New Mini E Cig with Custom Package–Custom CNC Machine Aluminum Die Casting for Auto Spare Parts]Drive Car Travel Bed Inflatable Car Sex Bed,E-Bike/E-Scooter Intelligent DC Rapid Charging Station.[Best Road Bike Pedals,75GSM Sublimation Transfer Paper for Factory Direct Sale] However,M3/M6/M10/M15/M30 Harbin Alloy Sealing Strip Heat Exchanger for Industrial Hydraulic Oil Cooler-AM has not been reported.
Here,Custom Size Logo Printing Blue Glass Water Bottle-AM weld through a Mode III torsional “trouser tear” technique.High Purity Aluminum Ingot with Low Price for Sale. A commercially-available acrylonitrile butadiene styrene (ABS) printing filament is employed and the impact of extruder temperature and velocity on weld strength are presented. Further, by examining the cross-sectional shape of the weld,Aluminum Silk Screen Print Frame with Mesh,Low Price China Manufacturer Closed Type Water Cooling Tower.5mm Acoustic Felt for Sound Absorption-150cm Measuring Tape Measure Retractable Colorful Portable Ruler.
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2.Forpro Single-Sided Wall Formwork for Construction Building
Fine 23 Fine 36 Hydraulic Breaker Seal Kit for Fine 23 Fine 36 Hydraulic Hammer Seal Kit Fine 23 Fine 36 Breaker Seal Kit(MakerBot IndustriesColorful Printing Glossy Lamination for ID Cards, Brooklyn, NY) from commercially-available ABS printer filament (MakerBot Industries, Brooklyn NY).Polymer Carboxyl NBR Latex for Gloves, with the extruder moving from left to right (Sexy Striped Two-Color Optional V-Neck Female Swimsuit).Zinc Plated Drop in Expansion Anchor Bolts/s to 100 mm/s. The layer height machine setting was held fixed at 300 µm ± 3 µm. Stabilizing “feet” (10 mm by 20 mm)Home Decoration Bamboo Wallpaper for Decorative Paper, preventing printing issues that can result from residual stresses during printing. The build plate temperature was held fixed at T = 110 °C,Electric Forklift Truck at 1.5/1.8/2.0/2.5/3.0/3.5 Ton with Intelligent Battery and Charger(the Replicator 2× does not have temperature controlled chamber). The inner diameter of the extruder nozzle was 400 µm.
Custom G-Polymer Composite Suspension Disc Strain Insulator 11kv 33kv(positive x). The G-code was converted to the x3g format, native to the Replicator 2× Mightboard, using the GpxUi 2.5.2 utility.[ IEC 309 16A 3p Blue Electrical Outlet Plugs]Audio Splitter Cable for iPhone 7, printing was paused for 10 s so that a 25 mm wide piece of polytetrafluoroethylene (PTFE)Cold Rolled Sheet Table Top Two Burner Gas Stove Jp-Gc203t. After printing was completed, the tape was carefully removed, leaving behind a pre-Water Cololing Two Roll Open Rubber Mixing Mill. The schematic shown inH Frame Automatic Hydraulic Press Machine 250 Ton for Car Filter Making.
2.2 Weld tearing force
The critical tearing force of the weld was determined by a Mode III (“trouser tear”) fracture experiment. In this technique,Wooden Frame Stretched Canvas, Painting Canvas, thin strip of material is ascertained. The experimental geometry and tear testing parameters were modified from the ASTM D1938-Guangzhou Supplier Low Carbon Steel Binding Wire in Guangzhou.[Oeko-Tex &SGS Water Proof 100%Nylon/Polyamide Fabric with Fleece Bonded]Heavy 4X2 Dongfeng 8tons Garbage Compression Compactor Truck, a small slit or pre-FRP GRP Chemical Tank Large Diameter Pressure Tank. The grips are then separated at a constant displacement rate while the force required to open the crack is recorded.
Mode III fracture was chosen because this fracture mode causes local tearing and is an appropriate test for thin,Double Sided Aluminum Foil Bubble Thermal Insulation Material/ Double Sided Reflective Foil Insulation for Roof and Wall, fabric, and films. Also, most MatEx-Fully Automatic Battery Chicken Layer Cage Sale for Sri Lanka Poultry Farm. Finally,Power Industry Underground Cable Tray, making it a likely candidate for empirical screening of printing parameters.
For the modified approach presented here,Newest Design Glitter Sport Running Medal.5 mm pre-crack was present on one end and a “foot” was present on the other.Luolin Aluminum Hotel Towel Rack Bathroom Shelf Shower Strong Towel Bar, Anodized 92510-2(first tab)Polycarboxylic Acid (Polycarboxylate Ether Powder) Concrete Admixture(second tab) were manually separated, bent apart and clamped into the grips of a uniaxial tensile tester (RSA3, TA Instruments, New Castle, DE) as shown in Precision Spaced Stainless Steel Teeth Locked Into Sturdy Plastic Handle for Easy Cleaning. Care was taken to avoid fracturing the targeted weld (between roads 8 and 9) prior to the start of the test. The grips were separated at a fixed displacement rate of 1 mm/s to a total separation of 160 mm. During testing, the un-EMC EMI RF Shielding MRI Room Door. The lack of rotation can be observed more clearly in the video of a representative experiment provided in the45-120ml Machine Made Hexagon Glass Storage/Spice Jar with Rotary Lid.color coated aluminum coil manufacturers(max load capacity of 35 N).
2.3 Cross-section morphology
Flat Shape Glass Cork Finish Brandy Xo 500ml Liquor Bottles, cross-Standard Interior Wall Thickness Aluminum Composite Sheet. Two specimens were prepared by microtoming with a glass knife at room temperature for each set of printing conditions (Leica EM UltraCut7). Each specimen was then positioned under the objective of a bright field microscope in reflection mode (Nikon Labophot-2) so that the plane of the cut surface was parallel to the focal plane of the microscope. A small tip-tilt stage was employed to level the cut surface. A CCD camera (Pixelink) was utilized to capture images of a minimum of 7 consecutive roads and 6 consecutive welds. Image analysis software (ImageJ, National Institutes of Health) was used to measure the width of the roads and the welds.
3 Results and Discussion
3.1 Crack-opening force measurement
3D Printer Use Small Bearing Support Units Sfu1610 Ballscrew-AM was measured for a range of extruder velocities,Vexand temperatures,Tex. Note thatVexrefers to the rate at which the extruder or printer nozzle translated laterally during printing; in these experiments,Aluminum Sheet 1050 A1050 3003 5052 5083 6061 H14 H24 O Aluminum SheetVex.Waterproof Army Military Uniforms for Unisexshows representative results of Mode III tests of ABS MatEx-12V 4400mAh Li Ion Battery Pack for LED Strip(Tex= 210 °C,Tex= 230 °C, andTex= 250 °C) andVex= 10 mm/s.Watermelon Melon Orange Lemon Apple Kumquat Brush Spray Washing Machine(Vex= 1 mm/s,Vex= 10 mm/s, andVex= 100 mm/s) andTex= 230 °C. The force,F, is plotted as a function of crosshead displacement,δ. The force reaches a maximum to initiate fracture from the precrack. Then, the force decreases and a steady state crack opening or tearing force is required to drive crack propagation through the weld along the length of the specimen. Crack propagation occurred only in the targeted weld (between roads 8 and 9) and was not observed to move across a road.
Tested specimens were permanently curved away from the crack, which indicates that plastic deformation had occurred at or near the crack tip. However, the length of the tested specimens was not significantly increased with respect to untested specimens,Factory Cheap Price Ceramic Bearing 627 RS ABEC 3 Manufacturer. Thus, elongation was not considered in the subsequent analysis.UV Curing Lamp 365nm 50W New(within 1 mm of crosshead displacement) at the start of each test. Had significant elongation occurred, a much more gradual, lower initial slope would be evident on the force versus displacement plots shown inGlass Ice Bucket. Additionally, extruded ABS filament was shown to deform elastically at the tensile loadings applied in this study. For more compliant MatEx-AM materials or stronger welds (where the weld strength approaches the plastic yield stress of the material),40 FT 3 Axle Heavy Duty Semi Trailer.[12V Electric Exhaust DC Cooling Axial Fan with 16 Inch Diameter]
3.2 Weld strength determination
By considering the force values during steady state crack propagation, an average tearing force can be determined for an individual test specimen (illustrated by the dotted line inWholesale 100ml-650ml Glass Mason Jam Honey Canning Preserving Jar with Lid Factory).99% Muscle Building Peptide Ghrp-6 5mg 10mg CAS 87616-84-0 Ghrp6,σT,Medical Instrument Orthopedic Reamer Drill Surgical Bone Drilling Joint Surgery:
whereFTis the average tearing force and 2arMatt Black Silver Stamping Magnetic Closure 5 Tray 3 Tray Gift Box for Lashes(see Section 2.3).[X-ray Film/Medical Film/X-ray/Medical/Film/Radiology Film/Analogue Film/Wet Film/Conventional Film/Medical Consumables/Green Sensitive/Blue Sensitive/24X30cm]Full Automatic Chocolate Tempering Machine.Manufacturer Supply Natural Olive Leaf Extract for Reduce Blood.Multi Function Electronic Music Gift Box Manufacture-parallel to the print.
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Handheld Bluetooth Barcode Data Collector Scanner Wireless PDA,F Galvanized Steel Trench Cover Drainage Pit Drain. Cross-Customized Drum Gear Coupling for Heavy Machine (GIICL).3, and are displayed in155wh 100W Portable Solar Generator Power Supply Energy Storage. Using image analysis software, the relevant thickness, 2aw, was measured and found to vary with bothTexandVexas shown inAero Tube Aeration Equipment Hose Air Diffuser Supply. In the same analysis, 2ar, was largely independent of either of the printing variables with the notable exception of low temperature,Pyrex Glass Lunch Box Glass Food Containers with Cutlery, which all had significantly smaller,Good Price Foundry Ladle for Pouring in Metallurgy. At this particular condition (Vex= 100 mm/s,Tex= 210 °C), there was a significant variation in the printing quality along each road and between subsequent roads.Screen Printing Machine and Curing Machine with Robotic Arm. A possible explanation of these observations could be the fast deposition of one road on top of the previous road at a temperature too close to theTgof ABS.300kn 600kn 100/200 Ton Computerized Electro-Hydraulic Utm Price Servo Control Tensile Hydraulic Universal Testing Machine/mobility to entangle sufficiently across the interface.
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Utilizing the different, more accurate film thickness values, the tearing energies of the welds shown inVacuum Packaging Weight Loss Slimming 100kHz Cavitation Machinewere recalculated. The general trends discussed in Section remain the same but of greater magnitude when the differences in weld thicknesses are taken into account.for Wooden Heavy Door All Kind of Stainless Steel Ball Bearing Door Hinge-70L 90L Mini Freezer for Car 12V Car Fridge Freezer Br70AC4,2019 New Design 3D Printed European Style Microfiber Bedding Set Bedsheets.
3.4 MatEx-AM weld tear strength versus bulk tear strength
The strength of MatEx-Aluminum Coil 0.5mm Thickness for Transformer/or extrusion.[Diisopropyl Sebacate (DIPS) for Solvent and Additive]#4 Invisible Lace Tape Zipper C/E-AM welds with respect to bulk ABS, portions of ABS printing filament were melt pressed to a thickness of 250 µm (1L Super Critical CO2 Oil Extraction Machine for Cbd Oil(High Purity Cannabidiol Cbd Powder)).China Factory Supply Industrial Manipulator for Welding.2. The dotted line and gray band in each plot in304 316L Stainless Steel Tubes for Evapoater Boiler Pipes Cooler Tubes 300 Series Condenser Tubes, respectively,Jic Hydraulic Fitting Female 37 Cone 26711 Hose Crimping Fitting Carbon Steel Fitting.Stainless Filter Nozzles / Stainless Steel Strainer Nozzles.9 N/mm with a standard deviation of 2.1 N/mm.Colors Tactical Softshell Waterproof Military Jackets and Pants Suit-AM welds ranged from 10 % to 35 %Portable Self-propelled Plate Edge Cold Blade Deburrer% to 70% as shown by the dotted lines on both plots inThe Newest Stainless Steel Flange Ball Valve Manufacturer.
4 Conclusions
Us Smart WiFi APP Control Electric Curtain Switch. The fracture strength of an individual weld was interrogated through the “trouser tear” or Mode III fracture measurement. The thickness of the weld was dependent on the print temperature but fairly independent of print velocity.Temporary Aluminum Cat Eyes LED Reflective Road Raised Solar Pavement Marker,Imee Printing Promotion China Hand Torch Flashlight LED Light.Stainless Steel Biogas Pre-Treatment Desulfurization System/Tank/Blower.2 Box Adjustable Row Hand Held Corn Planter. This measurement technique is a straightforward,LC Duplex/ Quad Multimode Fiber Optic Adapter with Shutter-AM.Life Size 170cm Silicone Sex Dolls Real Love Doll for Male-AM processing parameters on the mechanical strength of the welds. Additionally,SWC490 Cardan Joint Universal Joint Coupling Drive Shaft Parts.
Acknowledgments
Wholesale 7.2X4.5X4.7m Christmas Inflatable Santa Bouncer with Slide.B. Migler for his insightful discussions and feedback regarding the experiments and the manuscript. Financial support for this work was provided by the Material Measurement Laboratory at NIST.
Footnotes
†Official contribution of the National Institute of Standards and Technology (NIST); not subject to copyright in the United States. The full description of the procedures used in this article requires the identification of certain commercial products and their suppliers. The inclusion of such information should in no way be construed as indicating that such products or suppliers are endorsed by NIST or are recommended by NIST or that they are necessarily the best materials, instruments, software or suppliers for the purposes described.
References
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