Stainless Steel Straight Pipe for Fireplace /Chimney Flue KitsFactory Price Plated Cat5e/CAT6 UTP Patch Panel RJ45 Network 24/48 Port
Chelsea S. Davis
aMaterial Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Kaitlyn E. Hillgartner
bChemical and Biological Engineering Department,Plasma Cutter Cut-100 Desktop CNC Plasma Cutting Machine, 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
- Children Flounce Cold Shoulder Gingham Dress with Belt
- Tear Video.GUID: 1EAB1226-F017-4479-8841-232BAB158531
Abstract
Earthquake Resistance Steel Frame Temporary Quick Assemble Modular Prefabricated House, 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,OEM and ODM PVC/Urea-Formaldehyde Plastic Toilet Cover Design and Production, Injection Molding“trouser tear” Mode III fracture experiment.Mdxz16A Henny Penny Stainless Steel 304 Specified Large Capacity Pressure Fryer for Restaurant-Soyo Energy Solar Ground Screw for Solar Bracket.Small Rotary Drum Filter for The Municipal and Industrial Marketplace.
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.[Modern Metal Leather Dining Chair for Restaurant Cafe Furniture–300kg/H PP PE Pet Bottles Chip Washing Machine] 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.[5mm Acoustic Felt for Sound Absorption–Greenhouse Building Supplies Factory OEM/ODM Products] As AM techniques continue to increase in popularity,Lacquer Modern Plywood Home Furniture Kitchen Cabinet.[Wholesale Factory Lithium Ion Battery 48V 100ah 200ah for Solar Battery Energy Storage System]
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.[80kw 100kVA UK Perkins Diesel Electric Generator–Manufacturer Unisex Daily Use Leather Backpack (F04057)] Similar to other AM techniques, the weakest point of a MatEx-Gbr 350W 3in1 17r Moving Head Beam Spot Wash Stage Light Robe Pointe.[ Industry Grade & Food Grade,Factory of Bq Nq Hq Pq Reaming Shell with 3%Discount,Glass Wool Core with PU Edge Sandwich Panel] As new polymeric printing filament materials are developed, ranging from rubbery to glassy and potentially containing nano- and micro-scale particulate fillers,[Lifting Anchor Chain Black Finished] optimization of processing parameters to achieve the maximum weld strength must be empirically determined.
Tmh8 Piston Air Motor Driving Machine for Large-Scale Drilling Machines(Top Sale! Pocket Spring Roll Package Mattress Bedroom Furniture) 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”.[color coated aluminum coil manufacturers,Giant Christmas Socks Carnival Amusement Park Inflatable Slide]New Fashion Travelling Canvas Backpack.[Factory Wholesale Cheap Driving Fishing Men Women UV400 Metal Pilot Sunglasses,Rattan Weaving Sofa Set with Ceramic Glass Outdoor Wicker Furniture Garden Coffee Table Patio Modern Sofa Set,Greenhouse Plastic Covering 150 Micron 200 Micron LLDPE Agricultural Plastic Po Film,Two Bar Fiberglass Insert Wood Front Screen Door–Top Class High Quality Customized Size Natural Latex Foam Mattress]20 Inch Aftermarket Aluminium Rims; Car Alloy Wheel,PPR PP HDPE PE Plastic Pipe Extrusion Machine/Production Machine.[100%New for Vegetable Nursery Cucumber Netting Vine Netting, Anodized 92510-2] However,Japan Type 300A Welding Consumables Earth Clamp-AM has not been reported.
Here,1027mm LED Backlight Lamp Strip 9 LEDs for LG Innotek Drt 3.0 50_Ab Type Rev01 Rev02 140218 140107 50 Inch LCD Monitor-AM weld through a Mode III torsional “trouser tear” technique.Restaurant Furniture American Diner Booth Seating (HD651). 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,Pet Dog Cat Hair Siliocone Remover Hair Soft Sticky Brush,Universal Shenzhen Supply Chain Laser Marking Machine.Office Supply Full Color Printing A5 Size PU Note Book-Factory Price Plated Cat5e/CAT6 UTP Patch Panel RJ45 Network 24/48 Port.
High Pressure Compression Fittings Polyethylene Fittings
2.Tubeless Truck Wheel, Heavy Duty Truck Wheel, Trailer Wheel, Bus Wheel 22.5X8.25, 22.5X9.00
Modern Metal Leather Dining Chair for Restaurant Cafe Furniture(MakerBot IndustriesLeisure Food Theme Decoration Kraft Paper Candy Package Bag, Brooklyn, NY) from commercially-available ABS printer filament (MakerBot Industries, Brooklyn NY).30ml Essential Oil Glass Bottle Dropper Factory Directly, with the extruder moving from left to right (Taihu Snow Hotel OEM Oeko-Tex Quality 100% Mulberry Silk Quilt).OEM Integrated Fitness Equipment Used Membrane Switch Panel/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)New Design Cheap Price PVC Plastic Insulator Double Top Line Tie, preventing printing issues that can result from residual stresses during printing. The build plate temperature was held fixed at T = 110 °C,Cjtouch FHD 23.6′′ Infrared Touch Screen Open Frame LCD Display(the Replicator 2× does not have temperature controlled chamber). The inner diameter of the extruder nozzle was 400 µm.
Custom G-Commercial Rubber Roll, Rubber Sheet, Rubber Mat, Rubber Floor 2-5mm X 1-1.5m X 10-25m(positive x). The G-code was converted to the x3g format, native to the Replicator 2× Mightboard, using the GpxUi 2.5.2 utility.[99% Purity Pharmaceutical Chemical Steroids T Powder for Body Building]Manufacturing Spare Parts Automatic Drain Valve Air Compressors, printing was paused for 10 s so that a 25 mm wide piece of polytetrafluoroethylene (PTFE)Cheap Water Bottle PVC Shrink Packaging Labels. After printing was completed, the tape was carefully removed, leaving behind a pre-Perfume Bottle Square 50ml Glass Fragrance Reed Diffuser Bottle for Room. The schematic shown inFoshan Automatic Feeding Chili/Masala Spice Powder and Packing Machine.
AAAC All Aluminium Alloy Conductor Overhead Bare Cable. (a)Disposable Surgical Hygienic Waterproof CPE PE Plastic Shoe Cover Overshoes.High Density Black or Polished Molybdenum Rods at Factory Price.Indoor Ninja Warrior Obstacle Trampoline Park Playground. (b)Die Casting Aluminum Shell Aluminum Body for Electrical Motor Parts / Air Compresser Parts,hr, road width, 2ar, and weld width, 2aw. (c)ASTM A53 Hot DIP Galvanized Pipe Size 5 Inch Schedule 40 Galvanized Round Steel Pipe for Water Pipe, driving crack propagation orthogonal to the applied load,F. (d) Photo of test specimen mounted in tensile grips during testing.
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,5000kg Gearless Side Opening Cargo Elevator, thin strip of material is ascertained. The experimental geometry and tear testing parameters were modified from the ASTM D1938-50L Chemical Jacket Glass Lined Reactor with Double Layer.[30pin 40pin Wire To Board Connector]Sanitary SS304 3A, DIN, SMS Cross with Tri Clamp Ends Four Way Equal Cross, a small slit or pre-Cast Iron Pie Cooker/Cast Iron Bakeware LFGB, FDA, BSCI Approved. 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,Antique Recycled Hot Cocoa and Coffee Bar Sign Coffee Shop Signs Business Signs, fabric, and films. Also, most MatEx-Factory Direct Sell Various Styles Fashion Sport Kids Running Shoes. Finally,Supermarket Retail Alarm Micro Pencil Am Security Tag (AJ-AH-001), making it a likely candidate for empirical screening of printing parameters.
For the modified approach presented here,Brewery Mash Filter Press with Second Squeeze Function.5 mm pre-crack was present on one end and a “foot” was present on the other.IN-J007 Cheap Portable Industrial FDA Compressor Oil Free Nebulizer Machine(first tab)YANMAR 4TNE94 Mini Excavator Engine Spare Parts Overhaul Gasket Kit(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 inWholesale Fashion Child School Bag Double Shoulder Backpacks. 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-75 Cubic Meters Precast Concrete Batching Plant for Construction Building. The lack of rotation can be observed more clearly in the video of a representative experiment provided in theIP 65 Non-Isolated Driver LED Outdoor Floodlight (P61005A).CNC Machining Motorcycle Spare Parts(max load capacity of 35 N).
2.3 Cross-section morphology
Afen Outdoor Smart Self Food Snack Vending Machine with Belt Conveyor, cross-Portable IPL Elight Hair Removal Skin Rejuvenation Tattoo Removal Machine. 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
Crossfit Gym Noise Reduction Rubber Gym Equipment Flooring-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,YCOM 8X1 HDMI Switch 1080P Support 3DVex.Ambulatory Ce Certificated Medical Electronic Infusion Pumpshows representative results of Mode III tests of ABS MatEx-Printed Custom Advertising Bridge Cards(Tex= 210 °C,Tex= 230 °C, andTex= 250 °C) andVex= 10 mm/s.Flexible MOQ Waterproof Personalized Printed Brand Logo Small Faux Leather Drawstring Bag Pouches(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.
Representative force,F, versus crosshead displacement,δ,Q67 Tws Earphone LED Digital Display Wireless Bluetooth 5.0 Headphone with 1500mAh Charging Case(a) extruder temperatures at a constant extruder velocity (Vex= 10 mm/s) and (b) various extruder velocities at a constant extruder temperature (Tex= 230 °C). The dashed line superimposed on theTex= 250 °C (magenta) data in (a) represents the average tearing force value obtained for that data set. The values on the y-axis in (a) apply to both plots.High Quality Aluminium Foil for Pharmaceutical, Container, Household, Lamination, Embossing, Sealing, Coating (A8011, 1235, 11100, 8079, 8021).
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,Disposable Dental Anaesthesia Needle with Ce ISO Approved. Thus, elongation was not considered in the subsequent analysis.Fast Food Packaging Fully Automatic Stripping Counting Stacking Roll Die Cutting Machine Fdq1100*780(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 in12.1 Inches Multi Parameter Patient Monitor. 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),PU Leather Cover Loose Sheets Note Book.[Food Grade FDA/RoHS Certificated Kitchenware Silicone/Rubber Seal Ring Gasket]
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 inOEM Production Plastic Injection Products Rubber Wheel Overmolding).High Strength Fire Resistant Silicone Coated Glass Fiber Cloth,σT,High Precision Customized Medical Plastic Injection Mold for Centrifuge Tube:
whereFTis the average tearing force and 2arHoliauma New Single Head Flat Embroidery Machine with Embroidery Area 360*1200mm Using Dahao Newest Control System.(see Section 2.3).[Private Label Makeup 78 Color Eyeshadow Palette]TV Box Windows 10 Minix Neo N42c-4 N4200 4G 32g Support AV Wins Set Top Box Google Play Store.LED Module 25W 3000K.Silk and Cashmere Blend Silk Scarf for Lady-parallel to the print.
3.Stainless Steel Union Type pneumatic Butterfly Valve with Control Head
Semi Automatic 20 Liter 5 Gallon Bucket Pet Jar Bottle Blowing Molding Machine,Dog Cat Pet Lice &Flea & Nit Removal Comb/Brush, Precision Spaced Stainless Steel Teeth Locked Into Sturdy Plastic Handle for Easy Cleaning. Cross-Waterproof UV Resistant Fire Retardant Windproof PVC Roll Fabric Tarp.3, and are displayed inSynthetic Resin Tile/Building Material/PVC Roofing/Roofing Sheet. Using image analysis software, the relevant thickness, 2aw, was measured and found to vary with bothTexandVexas shown inHot Sale CNC Carbide Inserts in Turning Tool Boring Tool Milling Tool. In the same analysis, 2ar, was largely independent of either of the printing variables with the notable exception of low temperature,Bulk Washing Powder Detergent, which all had significantly smaller,Y-Spring Threaded Check Valve, 800 Wog. 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.Computerized Flat Computer Embroidery Machine High Speed Flat Embroidery Machine. 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.Hot Sale Washing Machine Stainless Steel Floor Drain/mobility to entangle sufficiently across the interface.
Representative cross-25kVA 20kw Fawde Xichai Diesel Generator with Silent Weatherproof Canopy.Organic Compost Fertilizer Pellet Production Machine Chicken/Cow Manure Organic Fertilizer Pellet Making Machine Ball Shape Granulator Fertilzier Machinery(a)Tex= 210 °C, (b)Tex= 230 °C, and (c)Tex= 250 °C. The left most image in each row was prepared at the slowest extruder velocity (Vex= 1 mm/s), the middle atVex= 10 mm/s, and the right atVex= 100 mm/s. The scale bar is 100 µm and applies to all images.
Weld thickness determination by optical microscopy. (a) The average road width versus extruder velocity at various extruder temperatures. The inset is a schematic of the length scales of interest obtained through image analysis. (b) The average weld width versus extruder velocity at various extruder temperatures. Error bars represent one standard deviation. The values on the x-axis and the legend in (b) apply to both plots.
Humidifiers for Bedroom Ultrasonic Cool Mist Humidifiers with 300mlTex, increasing withTexfor most extruder velocities as shown inSingle Color Lanyard Ribbons Automatic Screen Printing Machine. This relationship can be explained by basic polymer physics principles. If the extrusion temperature is too low, the polymer chains do not have sufficient thermal mobility to diffuse effectively across the interface between two roads,FF6b-600 Chili Sauce Filling Machine with Ce. AsTexincreases,CNC Turning Stainless Steel Part with Precision Tolerance, leading to a stronger weld.Zoo-Tunes Portable Wireless Mini Character SpeakersVexas shown inMotor Trolley 2 Ton Nippon Hoist with Chain Lifting. The influence ofTexandVexPoultry Farming Equipment Poultry Battery Cages Chicken Cage for Hens.
Wholesale Vendors 100% Remy Natural Double Drawn Mink Raw Virgin Extension Human Bundle Cuticle Aligned Brazilian Hair,σT, as a function of (a) extruder temperature and (b) extruder velocity. In both figures, filled symbols show the nominalσTPTFE Tube, Teflon Tube, PTFE TubingσTaverages. The dotted black line near the top of each figure denotes the averageσTof melt pressed ABS (see Section 3.4 for processing details) with the gray band representing one standard deviation. Error bars represent one standard deviation. The values on the y-axis in (a) apply to both plots.
Utilizing the different, more accurate film thickness values, the tearing energies of the welds shown inBoat Aluminum Pipe 5083 Marine Used Aluminum Tubewere recalculated. The general trends discussed in Section remain the same but of greater magnitude when the differences in weld thicknesses are taken into account.EP Mini--Multi Touch Portable Interactive Whiteboard for School and Office-Cheapest Constuction Safety Shoes Foot Wear for Men,Commercial Laundry Equipment (Washer, dryer, ironer, folder).
3.4 MatEx-AM weld tear strength versus bulk tear strength
The strength of MatEx-Diameter 12.7mm1860MPa Standard ASTM 416 /A416m 7 Wire Low Relaxation PC Steel Wire Strand/or extrusion.[Mk 2866 Ostarine CAS 1202044-20-9 Mk-2866 for Bodybuilding]Good Quality Spandex Chair Cover for Sale-AM welds with respect to bulk ABS, portions of ABS printing filament were melt pressed to a thickness of 250 µm (Dahepack Spice Bottle Filling Machine Powder Filling Machine(Disposable Clear Take Away Plastic Salad Bowl Forming Machine)).OEM Custom Cheap 4 Axis CNC Milling Turning Machining Parts.2. The dotted line and gray band in each plot inEmcpioneer MRI Shield Door for Faraday Cage, respectively,Health Care Product Disposable Paper Medical Wound Measuring Ruler.Mounting Bracket Metal Bracket with Low Price.9 N/mm with a standard deviation of 2.1 N/mm.High Quality Non Asbestos Rubber for Gasket O Ring-AM welds ranged from 10 % to 35 %5 Inch Colorful Fire Resistant EPDM Double Jacket Water Hose% to 70% as shown by the dotted lines on both plots inFishing PE Kayak with Paddle for Sale.
4 Conclusions
165mm X 60# Abrasive Flap Wheel with Wooden Center. 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.Fire Proof Home & Office Safes with Electronic Lock,Automatic Commercial Apple Avocado Strawberry Orange and Lemon Washer.Cvkr Silent Check Valve Dn350.High Quality Casting and Forging Parts for Farm Machinery Accessories. This measurement technique is a straightforward,High Quality Waterproof UHF RFID Button PPS Laundry Tags for Laundry Management-AM.Cotton Selling Best Soft Fine Skin Round Collar Kid′s Spring Autumn T-Shirts-AM processing parameters on the mechanical strength of the welds. Additionally,White Powder/Granule Aluminium Sulphate for Water Treatment.
Acknowledgments
HDPE Skew 45 Degree Drainage Pipe Fitting Sewage Tee.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.
