Annual Technical Conference - ANTEC, Conference Proceedings | Year: 2016
Many types of polymers are not weldable. For example, thermoset polymers cannot be welded. While thermoplastic polymers are considered weldable as a class, most combinations of dissimilar plastics cannot be welded. Even plastics within the same generic grouping may not weld easily because of high crystallinity or high melting temperature, widely differing melt flow indices, or high melt viscosity. In this presentation, the basics of adhesive bonding of plastics will be given. This will serve as review for some and introduction for others. General topics include surface preparations and primers, joint design, selection of adhesives, and some specific ideas on bonding of difficult materials such as fluoropolymers and elastomers.
News Article | May 4, 2017
AJAX, ONTARIO--(Marketwired - May 4, 2017) - Environmental Waste International Inc. (TSX VENTURE:EWS) (the "Company" or "EWI"), a company specializing in eco-friendly systems with proven patented technology for the breakdown of organic materials, today announced that it has received TSX Venture approval and has closed the previously announced financing raising gross proceeds of $1,721,250 with certain amendments to the terms of the financing. The terms of the convertible note (the "Note") set out on the Company's May 1, 2017 press release have been modified and the Note will now mature 5 years from the date of issue. Additionally, the investor will receive one common share purchase warrant (a "Warrant") for every common share of the Company purchased in such financing for a total of 3,712,500 Warrants. Each Warrant will entitle the holder to acquire one common share of the Company at an exercise price of $0.11 for a period of five years. EWI Investors, LLC (the "Investor") was the sole purchaser of securities in the financing. Immediately prior to the completion of the financing, the Investor held 5,000,000 common shares of the Company, representing approximately 3.2% of the outstanding common shares of the Corporation. After completion of this financing, the Investor will hold (a) 8,712,500 common shares, representing approximately 5.3% of the Company's outstanding common shares, and (b) 3,712,500 Warrants, representing approximately 96% of the Company's outstanding Warrants. Assuming full conversion of the Note and the exercise of all 3,712,500 Warrants, the Subscriber would hold 24,697,727 common shares, representing approximately 13.8% of the Company's outstanding common shares. The securities were acquired by the Investor for investment purposes. The Investor may from time to time acquire additional shares or other securities of the Company, dispose of some or all of the existing or additional securities of the Company, or continue to hold common shares or other securities in the normal course of its investment activities. Robert Savage, a director of the Company, is an insider of the Investor. An early warning report relating to the securities purchased by the Subscriber will be available on www.sedar.com under the Corporation's profile. Environmental Waste International, Inc. specializes in eco-friendly systems for the breakdown of organic materials, including tires. EWS has spent over 15 years engineering systems that integrate the EWS patented Reverse Polymerization™ process and proprietary microwave delivery system. EWS's unique microwave technology safely processes and recycles waste tires, while creating a highly valuable commodity output for industry, including carbon black, oil and steel. Each unit is designed to be energy efficient and where possible, create an economically positive model for the recovery of various hydrocarbon oil and gases. For more information please visit, www.ewi.ca. This news release includes certain forward-looking statements that are based upon current expectations, which involve risks and uncertainties associated with the Company's business and the environment in which the business operates. Any statements contained herein that are not statements of historical facts may be deemed to be forward-looking, including those identified by the expressions "anticipate", "believe", "plan", "estimate", "expect", "intend", and similar expressions to the extent they relate to the Company or its management. The forward-looking statements are not historical facts, but reflect the Company's current expectations regarding future results or events. These forward-looking statements are subject to a number of risks and uncertainties that could cause actual results or events to differ materially from current expectations, including the matters discussed under "Risks and Uncertainties" in the Company's most recent Management Discussion & Analysis, which can be found on the Company's profile at www.sedar.com. The Company assumes no obligation to update the forward-looking statements, or to update the reasons why actual results could differ from those reflected in the forward-looking statements. Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
Fatigue and Fracture of Engineering Materials and Structures | Year: 2016
This paper revisits a complicated analytical solution of the stress intensity factor K adopted in a newly published British standard BS 8571:2014 for clamped single edge notched tension (SENT) specimens. Comparison with existing numerical results of K shows that the analytical K solution in BS 8571 is correct only for the crack length to specimen width ratio a/W ≤ 0.6, but incorrect for a/W > 0.6. A reinvestigation is thus performed using the crack compliance method, and a corrected K solution is obtained for the BS 8571 clamped SENT specimens over the full range of a/W. On this basis, a simple closed-form solution of K is obtained using the best curve fitting with an accuracy within 1% for crack sizes up to a/W = 0.98. Results show that the proposed closed-form solution of K agrees well with the numerical results of K for the clamped SENT specimens. © 2015 Wiley Publishing Ltd.
Engineering Fracture Mechanics | Year: 2015
Fracture control technology has been developed to control brittle and ductile fracture initiations as well as fracture propagation in gas pipelines. The approaches developed forty years ago remain in use today for fracture initiation control, but not for ductile fracture propagation control. Different methods have been proposed for high-strength pipeline steels. This includes the two-curve model, simplified equations, corrections, correlations, alternative fracture criteria and finite element methods. This paper presents a state-of-the-art review on fracture control technology and development for modern and vintage gas transmission pipelines with critical discussions and recommendations. © 2015 Elsevier Ltd.
Journal of Pressure Vessel Technology, Transactions of the ASME | Year: 2016
This paper presents a critical comparison of the traditional strength criteria and the modern plastic flow criteria used in the structural design and integrity assessment of pressure vessels. This includes (1) a brief review of the traditional strength criteria used in the ASME Boiler and Pressure Vessel (BandPV) Code, (2) a discussion of the shortcomings of the traditional strength criteria when used to predict the burst pressure of pressure vessels, (3) an analysis of challenges, technical gaps, and basic needs to improve the traditional strength criteria, (4) a comparison of strength theories and plasticity theories for ductile materials, (5) an evaluation of available plastic flow criteria and their drawbacks in prediction of burst pressure of pressure vessels, (6) a description of a newly developed multiaxial yield criterion and its application to pressure vessels, and (7) a demonstration of experimental validation of the new plastic flow criterion when used to predict the burst pressure of thin-wall pressure vessels. Finally, recommendations are made for further study to improve the traditional strength design criteria and to facilitate utilization of the modern plastic flow criteria for pressure vessel design and analysis. © 2016 by ASME.
TMS Annual Meeting | Year: 2011
Friction stir welding (FSW) of hard metals such as steel and titanium requires unique tool materials capable of achieving long linear lengths while minimizing tool degradation. Tungsten-based materials have demonstrated success as a FSW tool material in resisting degradation while maximizing tool life. Here, a review of the development of current and future tungsten (W)-based tool materials for the FSW of hard metals will be given. Tool degradation mechanisms will be characterized along with cutting edge tool materials when used for welding 70-ksi high-strength steel and Ti-6Al-4V. In addition, resulting weld mechanical properties from these welds with corresponding stir zone microstructural characterization will be presented. This on-going work has resulted in a greater understanding of W-based tool materials and the development of improved W-based tool material compositions capable of achieving tool life in the hundreds of feet.
Welding Journal | Year: 2013
The susceptibility to stress-relaxation cracking of Alloy IN740 was evaluated using high-temperature tensile testing and Gleeble stress-relaxation testing in the temperature range from 600°-900°C and compared to Alloys IN718 and Waspaloy®. The test results indicate that the susceptibility to stress-relaxation cracking of IN740 is lower than that of Waspaloy, and it is similar to that of Alloy IN718. A ductility dip was observed in the alloys tested. IN740, IN718, and Waspalloy showed a ductility (reduction of area) minimum of 11.3% at 850°C, 8.5% at 750°C, and 4.0% at 900°C, respectively. The three alloys showed an increase of effective stress or negative-creep behavior during stress relaxation at most testing temperatures, increasing the driving force for stress-relaxation cracking. Waspaloy presented a normal stress relaxation behavior at 850°, 900°, and 950°C. Phase computational modeling predictions indicate that IN740 and Waspaloy are strengthened mainly by γ ' precipitates while IN718 is hardened by the precipitation of both gamma prime and gamma double prime. The modeling predictions show that alloys strengthened only by gamma prime (IN740 and Waspaloy) present faster precipitation reaction kinetics and experience formation of eta phase during the stress relaxation tests. The synergistic effect of stress relaxation behavior, characteristics and kinetics of precipitation reactions, and high-temperature or creep ductility may control the relative susceptibility to stress relaxation cracking of these three alloys.
NDT and E International | Year: 2012
Electromagnetic properties of heat exchanger tubes with outside diameter in the range from 15.8 mm to 25.3 mm and wall thickness in the range from 0.63 mm to 1.6 mm made of SAF 2205, Type 439 and Sea-Cure were determined with model-based eddy current technique. Two encircling eddy current measurement sensors with uniform field were optimized and designed based on initial computer modeling results. A precision measurement circuit was assembled with the sensors and a lockin amplifier. Sensor computer models were built and validated through direct magnetic and voltage measurements. The sensor magnetic field uniformity was tested and agreed very well with model predictions. The sensor resonance frequencies were verified to ensure resonance effects would not interfere with the measurement process. The tubes electrical conductivity and initial magnetic permeability were determined through optimization process minimizing the cost (objective) function at three frequencies 200 Hz, 1 kHz, and 2.5 kHz. The agreement between the eddy current and other conventional destructive magnetic and electrical measurements was very good where relevant comparison was possible. © 2012 Elsevier Ltd. All rights reserved.
NDT and E International | Year: 2012
Electromagnetic properties of heat exchanger tubes made of SAF 2205, Type 439 and Sea-Cure stainless steels were determined with magnetic and electrical techniques. The standard magnetic measurements were conducted at direct (DC) and alternate (AC 200 Hz) current excitation. The magnetic permeability, coercivity, retentivity, and other magnetic parameters were measured in tube axial and circumferential direction, in open and closed magnetic circuits and in wide range of magnetic field strengths from 10 A/m to 82 kA/m. The electrical conductivity was determined with custom-designed fixture in axial direction only at DC and AC (50 200 Hz). The unique set of results revealed that a certain anisotropy of properties existed between the two geometric directions. The agreement between the measurements from the different techniques was good where comparison was possible. © 2012 Elsevier Ltd. All rights reserved.
News Article | March 3, 2017
The melting pot known as America includes many cultural ingredients, and Finnish-American pianist Jennifer DeFrayne is playing her part to contribute the special spice known as “sisu.” Her sophomore album (titled Sisu) is co-produced with Corin Nelsen, and releases globally today via her independent record label, Palo Isle Music; it is available in physical CD or digital form, on Amazon, iTunes, CDBaby, most music websites and http://www.jenniferdefrayne.com. “Sisu” was a familiar word for DeFrayne, growing up in the Upper Peninsula of Michigan, one of the cradles of Finnish culture in the U.S. It is loosely defined as a unique quality characterizing the Finnish spirit…a mindset that enables an individual to reach beyond their present limitations, act against all odds and transform struggles into success. It is believed to be a universal capacity which we all share: Perseverance, Courage, Endurance, Determination, Grit, Fortitude, Bravery, Spirit, Resilience and Inner Strength. DeFrayne’s life is a demonstration of sisu, as told more deeply in her biography. At the age of 5, she embarked on her journey as a self-taught pianist inspired by the wild beauty of the land around her, which is featured in her new Sisu music video. Despite many family heartbreaks and health challenges, she continued turning to the piano for solace, and in 2014, was named Best New Artist by Zone Music Reporter, when her debut album By A Wire (Little Hartley Music) was also nominated for Best Piano Album with Instrumentation. Many artists release a critically-acclaimed debut album only to stumble a bit on the sophomore effort. Such is not the case for DeFrayne, according to earlier reviewers. While Sisu shows growth and change for DeFrayne, it also underscores the fact that the praise heaped on her first recording was a mere precursor to the artistry yet to come. Regarding the evolution of the 12 songs on the new album, Sisu, she says, "Each song on this album embraces the spirit of sisu in one way or another, and each song is meant to reflect the many characteristics of sisu." To highlight a few tracks on the album, one begins with “Fire Island” a contemplative piece titled with an English translation of her strong Finnish maiden name “Palosaari.” The raw pouring out of emotion that DeFrayne invites the listener to witness is instantly engaging. The mood lightens on “Be Who You Are,” indicating the acceptance of the trials and tribulations that have riddled her life. By far, the most haunting and moving song on the album is its namesake “Sisu.” The artful layering of tones, moods, and instrumentation (piano, violin, bass guitar and Electronic Wind Instrument aka EWI) certainly earn this track the title of a masterpiece. Her years of coping with personal grief, illness and recovery from a stroke at an early age, led Jennifer to want to heal others, too; this healing spirit is apparent in the peaceful song “Palo Santo.” The airiness of an EWI with gentle piano and vocalizations conveys a sense of calm and space. “Equanimity” feels like a deep breath in a trying time; conveying multiple emotions at once, DeFrayne engages soft vocals and English horn to portray strength and composure in the midst of a storm. “Perseverance” is Jennifer’s closing message to her listeners; it is melancholy wrapped in joy, with a touch of percussion added to an encouraging and hopeful soundscape. An impressive roster of guest artists contributed to the album, including Jeff Haynes (percussion), Premik Russell Tubbs (EWI and sax), Michael Manring (bass guitar and EBow), Jill Haley (English horn and oboe), Sara Milonovich (violin and vocals), Jeff Pearce ("ambient" guitar), and Jeff Oster (flugelhorn). Sisu was produced by DeFrayne and Grammy®-award winner Corin Nelsen (SynchroSonic Productions), who also mixed & mastered the album. All music was composed, and piano performed, by DeFrayne. In an early review, noted music writer Bill Binkelman stated "Jennifer DeFrayne's Sisu is not just better than her debut, which is already high praise, but it is a work of such emotional depth, technical artistry, and self-assuredness, that I am left wondering 'Where has this remarkable woman been all this time?' " In 2017, Finland celebrates 100 Years of Independence with its Centennial, and the world will learn much about Finnish life, culture and traditions. Thanks to DeFrayne’s new album, many Americans will be ahead of the curve, having already learned the essence of sisu from her life and music. Broadcast promotion for the album is handled by LAZZ Promotions, Ed & Stacey Bonk; contact via (905) 470-1230 or e-mail: lazzpromotions(at)rogers.com. For review copies and interviews, please contact Beth Ann Hilton at The B Company / PR & Marketing, via (310) 560-8390 or e-mail: bethhilton(at)theBcompany.com. Track List: Fire Island (5:49) Be Who You Are (4:19) Sisu (7:17) Beyond (5:19) Gathering (3:55) Palo Santo (6:21) Roots (3:38) Stepping Stones (5:02) Equanimity (4:41) Internal Light (3:23) Renew (3:41) Perseverance (5:25)