Open Access. Powered by Scholars. Published by Universities.®
Other Materials Science and Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Polymer and Organic Materials (5)
- Structural Materials (4)
- Metallurgy (3)
- Aerospace Engineering (2)
- Nanoscience and Nanotechnology (2)
-
- Semiconductor and Optical Materials (2)
- Analytical, Diagnostic and Therapeutic Techniques and Equipment (1)
- Applied Mechanics (1)
- Bioimaging and Biomedical Optics (1)
- Biomaterials (1)
- Biomedical Engineering and Bioengineering (1)
- Chemistry (1)
- Computer-Aided Engineering and Design (1)
- Diagnosis (1)
- Engineering Science and Materials (1)
- Mechanical Engineering (1)
- Mechanics of Materials (1)
- Medicine and Health Sciences (1)
- Other Biomedical Engineering and Bioengineering (1)
- Physical Sciences and Mathematics (1)
- Polymer Chemistry (1)
- Structures and Materials (1)
Articles 1 - 17 of 17
Full-Text Articles in Other Materials Science and Engineering
Effects Of Release Materials And Temperature Ramp Rates On The Surface Finish Of Carbon-Fiber Composite Components, Sudeep Louis, Thucmy Dang, Ethan Schlocker
Effects Of Release Materials And Temperature Ramp Rates On The Surface Finish Of Carbon-Fiber Composite Components, Sudeep Louis, Thucmy Dang, Ethan Schlocker
Materials Engineering
Toray Advanced Composites is interested in improving their carbon fiber reinforced polymers (CFRP) manufacturing process by enhancing their control on the amount of surface roughness for varied customer preference. Surface roughness of CFRP is important in post-production processes including coating, priming, and painting. This project seeks to determine the effects of three release materials and two temperature ramp rates on the surface finish of CFRP. The release materials used were Tooltech, FEP, and Frekote 770-NC. The two initial temperature ramp rates were 1°F/min and 2°F/min. Surface roughness was measured using a profilometer and analyzed using Ra values. Ra is an …
Analysis Of Novel Corrosion Resistant Maraging Steels For Use In Additive Manufacturing, Bradley Michael Samuel, James Knowlton Smith
Analysis Of Novel Corrosion Resistant Maraging Steels For Use In Additive Manufacturing, Bradley Michael Samuel, James Knowlton Smith
Materials Engineering
Stainless maraging steel has been proven to be an industry standard material for plastic injection molds. Its high hardness and corrosion resistance extend the lifetime of the tool. This alloy system is also well-suited to additive manufacturing, which can be utilized to form internal cooling channels, further increasing tool life. Using Rapid Alloy Development (RAD) Oerilkon METCO is developing a new composition of stainless maraging tool steel that has high hardness/strength, is corrosion resistant, and has additive-capable melting and solidification properties. This study tests the hardness and corrosion resistance of the new RAD alloys against the current market competitor Corrax …
Manipulating Fiber Orientation For The Reduction Of Warpage In Carbon Fiber Composite Sandwich Panels, Landon Burnley, Gabrielle Correia
Manipulating Fiber Orientation For The Reduction Of Warpage In Carbon Fiber Composite Sandwich Panels, Landon Burnley, Gabrielle Correia
Materials Engineering
Safran Cabin (Santa Maria, CA), previously known as Zodiac Aerospace, designs and manufactures interior cabin components for private and commercial aircraft. Carbon fiber face sheets have recently been incorporated in their overhead luggage bin assemblies which utilize a composite sandwich panel design, in order to provide additional stiffness to the previous glass fiber sandwich panels. Since the introduction of carbon fiber in these luggage bin panels, Safran has experienced an increase in warpage during manufacturing. When inspected by quality control, the panels are tested mimicking how they are installed in aircraft. If the panels do not meet specifications, the warped …
Invariant-Based Method For Improving Efficiency Of Mechanical Testing In Aerospace Certification Of Carbon Fiber-Epoxy Composites, Alyssa Rina Gruezo, Erika Gabrielle Hansen
Invariant-Based Method For Improving Efficiency Of Mechanical Testing In Aerospace Certification Of Carbon Fiber-Epoxy Composites, Alyssa Rina Gruezo, Erika Gabrielle Hansen
Materials Engineering
The current challenge with qualification of carbon fiber composites in the aerospace industry would be the low efficiency of testing hundreds of samples. The Trace Theory strives to streamline the qualification process by utilizing a material’s Trace to predict properties of composites using Excel programs and basis data. To test this theory, predicted properties from the program, QuickLam, were compared to experimental data. Unidirectional 0° (T1), unidirectional 90° (T2), quasi-isotropic (T3), and hard quasi-isotropic (T4) laminates were made using HexTowR carbon fiber and TC250 resin provided by TenCate Advanced Composites. Tensile and compression tests were done according to ASTM D3039 …
Shear Strength Of Carbon Fiber/Epoxy Hinges Using The V-Notch Rail Shear Test, Calvin Noetzel
Shear Strength Of Carbon Fiber/Epoxy Hinges Using The V-Notch Rail Shear Test, Calvin Noetzel
Materials Engineering
The mechanical properties of carbon fiber reinforced polymer (CFRP) hinges produced by Common Fibers (Kent, Washington) are a new technology with uncharacterized mechanical properties. Currently, Common Fiber’s hinges are utilized in wallets, but in order to expand the application of the hinges to structural components, complete characterization of the mechanical properties of the hinges is necessary. To address this problem, hinges developed by Common Fibers were tested utilizing the V-Notch rail shear test, ASTM D7078, to determine the shear strength of the hinges. Two layups, [+45/-45/0]s and [0/+45/-45/0]s were produced by Common Fibers for the experiment. Hinged and …
Electrochemical Characterization Of Precious Metal Braze Alloys Using Potentiodynamic Polarization, Maxwell Glen Martin, Mason Gregory Morgan, Matthew David Vance
Electrochemical Characterization Of Precious Metal Braze Alloys Using Potentiodynamic Polarization, Maxwell Glen Martin, Mason Gregory Morgan, Matthew David Vance
Materials Engineering
This study aimed to characterize the electrochemical behavior of six precious metal braze alloys by performing potentiodynamic polarization tests (ParStat 2273) based on ASTM Specifications G5 and G59. To determine the extent to which the alloys will contribute to galvanic corrosion in a marine environment (3.5 wt% NaCl), corrosion analysis software was used to produce fitted Tafel lines to determine the open circuit potential, Voc, for each alloy. The Voc values for the alloys were found to be -66.58 mV for Gold ABA, 13.01 mV for Nicoro®, -39.00 mV for Nioro®, 23.4 mV …
Low Velocity Impact Tower Feasibility, Setup, And Impact Testing Of Carbon Fiber Reinforced Epoxy Thermoset And Peek Thermoplastic Matrix Composites, Brent Plehn
Materials Engineering
A low velocity impact tower was donated to Cal Poly's Materials Engineering Department along with four fiber reinforced polymer matrix composites. The tower was set up in building 192 in the Mechanical Testing Laboratory. Improvements were made to the tower including adding velocity detection capabilities, making loose hardware inclusive, adding an extra tower arm for better consistency, adding a double jawed clamp for faster testing, and rerouting the tower's compressed air system to improve performance. A standard operating procedure was drafted, tested, and redrafted for impact testing composite panels. The four composite panels consisted of two quasi-isotropic 16 ply AS-1 …
Analyzing The Flexural Properties Of Self-Constructed Bamboo Laminates, Brett Dorren
Analyzing The Flexural Properties Of Self-Constructed Bamboo Laminates, Brett Dorren
Materials Engineering
Bamboo plies of 1/8" and 1/32" thicknesses were glued together to form multiple unidirectional and cross-ply laminates that measured 12" by 12". The thickness of each laminate was between 0.25" and 0.375". All laminates were pressed together with a Tetrahedron MTP-10 bench top precision press at 75°F and 1000 lbf for 40 minutes. Laminates were then cut with a band-saw into four 3" by 12" test specimens, 24 hours after pressing. Each test specimen was three-point bend tested to identify the modulus of rupture (MOR) and apparent bending stiffness. Three-point bend testing was also performed on laminates that were …
Evaluation Of High Phosphorus Electroless Nickel Platings To Protect Carbon Steel Heat Exchangers In Seawater Service, Nathan Brink
Evaluation Of High Phosphorus Electroless Nickel Platings To Protect Carbon Steel Heat Exchangers In Seawater Service, Nathan Brink
Materials Engineering
The purpose of this project was to determine the suitability of using a high phosphorus electroless nickel (HPEN) coating to prevent corrosion in carbon steel heat exchangers in seawater service. 1 in. x 4 in. samples were cut from ¼ in. SA-516-70 pressure vessel plate, pickled to remove mill scale, dressed with 300 grit sand paper and sent out for plating with 2 mils of HPEN. Due to a clerical error during plating, samples were plated to a significantly lesser extent than requested. Samples were plated with approximately 0.6 mils of HPEN versus the 2 mils requested, however this was …
Measuring The Mechanical Properties Of A Newly Developed Discontinuous Carbon Fiber And Epoxy Composite, Morgan Adams
Measuring The Mechanical Properties Of A Newly Developed Discontinuous Carbon Fiber And Epoxy Composite, Morgan Adams
Materials Engineering
Engineering firm Pratt & Miller have developed a new and previously untested carbon fiber/epoxy composite using a spray lay-up process similar to a process commonly used in fiberglass production. This new composite is made by using a pneumatic chop gun that simultaneously cuts the carbon fibers to a specific length and deposits the chopped fibers and resin onto surface of an exposed mold surface. The composite is then rolled down to flatten and better wet the fibers and then the whole mold is vacuum bagged at room temperature to cure. The flexural stiffness and flexural strength of the composite with …
Tensile Properties Of Adhesive Joints Between Alclad 2024-T3 Aluminum Sheets And Extruded 6061-T6511 Aluminum For Use In Ultralight Personal Aircraft, Kevin Jones
Materials Engineering
Cold cure two-part epoxy adhesives were tested in aluminum joints to investigate their viability for use in an ultralight aircraft. The joints consisted of Alclad 2024-T3 aluminum sheets adhesively bonded to extruded 6061-T6511 aluminum, and are part of low-load-bearing members required to carry a minimum load of 175 lbs./ft. or 14.58 lbs./in. The Alclad 2024-T3 and 6061-T6511 aluminum were prepared by sanding with 80 grit abrasive paper, the surface was cleaned with acetone to remove surface contaminants, rinsed with distilled water, and dried using paper towels. Once the surface was prepared, the test coupons were assembled using one of the …
Fluorescence Characterization Of Quantum Dots For Use As Biomarkers, Logan M. Grimes
Fluorescence Characterization Of Quantum Dots For Use As Biomarkers, Logan M. Grimes
Materials Engineering
Fluorescence profiles of quantum dots (QDs) were characterized to select the ideal QDs for encapsulation in phospholipids for use as biomarkers to selectively adhere to cancer cells. QDs were synthesized and extracted 0, 30, 60, and 90 seconds after precursor compounds were mixed. These extractions were isolated by extraction time. Portions from each vial were coated in a zinc sulfide shelling procedure, leaving at least half of the QD solution unshelled. These samples were characterized over four days to monitor fluctuations in fluorescence. This was done utilizing an Ocean Optics spectrometer in conjunction with Spectra Suite software. The central wavelength, …
Design And Construction Of A Simulated Evaporative Heat Exchanger For Testing The Mitigation Effects Of Pipe Coatings On Mineral Scale Deposition, Taylor J. Anderson
Design And Construction Of A Simulated Evaporative Heat Exchanger For Testing The Mitigation Effects Of Pipe Coatings On Mineral Scale Deposition, Taylor J. Anderson
Materials Engineering
The thermal efficiency of evaporative heat exchangers is diminishing due to mineral scale buildup on heat exchanger surfaces. A simulated evaporative heat exchanger was designed and constructed for testing the mitigation effects of polymer coatings on mineral scale deposition rates. The heat exchanger was designed to cool hot mud at 200°F using a cooling water supply with a calcium concentration of 1000 ppm. The system was constructed using 1.5-inch diameter polypropylene piping, a DIG Corporation drip irrigation system, a TotalPond 530 GPH pond pump, an Omega CSI32K miniature benchtop controller, Omega FWH321-020 high temperature heater tape, and fifteen copper pipe …
Application Of Quantum Dots Onto Glass Wafers As A Feasibility Test For The Spectral Down Conversion Of Uv Light For Solar Cells, Anthony Fong
Materials Engineering
Quantum dots have the ability to convert high energy photons into multiple lower energy photons. Down conversion of such high energy photons from sources such as UV light can be beneficial for applications on solar cells which waste much of the energy in the form of thermalization. To test this theory, a solar cell was hooked up to an Amprobe Solar Analyzer and tests were run to compare power output with and without the presence of quantum dots. Additionally, quantum dots were spin coated onto a glass wafer to determine its adhesion ability. Spectrometer readings were taken of the wafer …
Biaxial & Twist Testing Of Composite Carbon-Fiber Sandwich Panels For Automotive Racing Vehicles, Erik Eckberg
Biaxial & Twist Testing Of Composite Carbon-Fiber Sandwich Panels For Automotive Racing Vehicles, Erik Eckberg
Materials Engineering
Composite sandwich panels were constructed with 4-ply plain weave carbon-fiber/epoxy face sheets in the 0o/45o/0o/45o orientation and 1/8th inch Nomex honeycomb core. The panels were cut into 5-inch square test plates for mechanical testing. All testing was done on a fixture designed and fabricated by Pratt & Miller Engineering and installed on an Instron testing system at Cal Poly. The twist test was performed by supporting diagonal corners of the plate while simultaneously loading the opposite two corners at a crosshead rate of .06 in/min (ASTM 3044-94R11). Out of 10 panels tested, …
The Effects Of Cure Schedule On Properties Of Glass-Fiber Reinforced Epoxy Matrix Composites, Trevor J. Lee
The Effects Of Cure Schedule On Properties Of Glass-Fiber Reinforced Epoxy Matrix Composites, Trevor J. Lee
Materials Engineering
Two different two-component resin systems were cured, via Differential Scanning Calorimetry, for the times recommended by their respective manufacturers. The resin cure schedules were designed to simulate typical and attainable processing conditions; they were cured at 120°F, 140°F, and 160°F, and in-mold post-cured at 200°F, 230°F, and 260°F. The resulting scans were then compared to a baseline cure for each resin system, consisting of two heating-cooling cycles at a constant rate of temperature change. These baseline cures were then used to determine the percent cure of each sample and the shift in glass transition temperature between the baseline cure and …
Using Living Materials To Intervene In The Natural Succession Process To Accelerate The Re-Development Of A Self-Sustaining Ecosystem That Has Been Damaged By Human Intervention, Eric Jorgensen
Materials Engineering
No abstract provided.