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Showing 1 to 20 of 376 for “"ASTM"”.
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Improved Venting for Flammability Limit Testing Using ASTM E681 Apparatus
… limits was reviewed and experts on the ASTM E681 standard were interviewed to identify new means of improving the reproducibility of the ASTM E681 test. Venting was identified as a variable of flammability limits not yet addressed. Limitations of the current system for sealing and …
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Corrosion Behavior of ASTM A1010 Stainless Steel for Applications in Bridge Components
… of a low chromium-content stainless steel, ASTM A1010, for use in steel bridge members. This stainless steel has been marketed as a potential replacement for conventional structural steels for bridges located in highly-corrosive environments, with the potential to provide life-cycle cost …
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Characterization of new particulate MMC materials and bolted joints through applicable ASTM standards
… thermal expansion are conducted according to the ASTM standards in order to characterize the material. All these tests are conducted for the matrix alloy, for 30% and 45% reinforced MMC. It was found that due to the presence of SiC particles there was a considerable increase in Young's modulus, …
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Flexural Resistance Factors for Partially Prestressed Members Using ASTM A 1035 Reinforcing Steel
… concrete beams in the United States is ASTM A615, Grade 60. However, several high-strength reinforcing bars are now available. These bars are believed to offer better performance in reinforced and prestressed concrete beams. The current specifications ACI 318 and AASHTO LRFD are designed …
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Development of a test facility for making in-duct sound measurements according to Astm E477-1984
Duct silencers must reduce sound levels enough to be noticed by the human ear. By placing the appropriate duct silencer in the air-conditioning duct system, sound levels in rooms where noise is a problem can be significantly reduced. Only through insertion loss measurements can the appropriate …
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Freeze-Thawing of Polyester/E-Glass as an Evaluation of an ASTM International Test Standard Proposal
… sectors and also in resisting this exposure. ASTM International has yet not developed a standard to test FRP materials resistance to freeze-thaw (FT) cycling exposure. The D20.18.02 committee of the ASTM is in the process of creating a test standard for freeze-thawing of FRP and has developed …
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Caracterização microestrutural de juntas soldadas de aço ASTM A-1018 produzidas por soldagem helicoidal em campo
… pela máquina a partir de bobinas de aço ASTM A1018, sendo dois desses tubos com espessura de parede de 12,5 mm, um deles com 16 mm e os três com diâmetro de 1200 mm. Cada um dos tubos teste foi soldado com velocidades distintas (800, 1200 e 1600 mm/min) com dois passes de solda …
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Evolução das tensões residuais e sua relação com a “misorientação” microestrutural de um aço astm dh36 após soldagem
The residual stress is an important parameter to be studied in order to guarantee reliability and resistance of the structures and to avoid their future failures. A particular phenomenon about residual welding stress changes over time has recently been observed with the residual stress evaluation …
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ASTM assessment of a novel shoulder prosthetic design: measurement of glenoid edge motion in three degrees of freedom
… The American Society for Testing and Materials (ASTM) set out a standardised test to evaluate glenoid loosening, in which the glenoid is cyclically loaded (for 100,000 cycles) and the vertical displacement of the edges is measured. However, under load the glenoid edges will also deflect …
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Effects of Head Size on the Performance of Twist-Off Bolts
… Specification (2000) removes the requirement for ASTM F436 washers (ASTM 2000a) under the bolt head of twist-off bolts where the head diameter equals or exceeds that of an ASTM F436 washer when oversized and slotted holes are used. The need for washers is also removed for A490 strength bolts used …
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Evaluación de la factibilidad del uso de la resistencia del concreto elaborado con cemento de mampostería ASTM C-91 tipo M, en la construcción de viviendas coladas in-situ
Concreto -- Calidad de los componenentes del concreto -- Características deseables en el concreto -- Sugerencia técnica para la construcción de viviendas de paredes premoldeadas coladas in-situ --Diseño de mezcla y ensayos de laboratorio -- Pruebas a los agregados del concreto -- Cálculo para el …
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Comparison of Shear Modulus Test Methods
… research compared the results of three tests: ASTM D 198 torsion, ASTM D 198 three-point bending and the five-point bending test (FPBT) using machine-stress-rated (MSR) lumber and laminated veneer lumber (LVL) to determine if the shear properties evaluated by the different test methods were …
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Mitigating alkali silica reaction in recycled concrete
… concrete using the testing procedures of ASTM C 1260/1567 and ASTM C 1293. Pore solution analysis and Thermal Gravimetric Analysis (TGA) were also conducted.</p><p>It was found that fly ash, silica fume and ground granulated blast furnace slag (GGBFS) were effective in mitigating ASR in …
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The Tissue-reduced Virtual Family Models for RF-induced Heating Evaluation of Passive Medical Implants at 1.5 T and 3 T
… for the safety of patients. The study in ASTM phantom and human models is adopted to evaluate the RF-induced heating near the medical implants. To make the experiment in human models more practical, the tissue-reduced virtual family models were proposed for RF-induced heating simulation …
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Interfacial strength development in thermoplastic resins and fiber-reinforced thermoplastic composites
… an interfacial tension test based on the ASTM tensile adhesion test (ASTM D897) and a fracture toughness test using a compact tension (CT) specimen (based on the ASTM toughness test for metals ASTM E399-83). The interfacial tensile test proved to be very difficult to perform and with an …
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Developing An Alternative Hardened Concrete Air Void Characterization Method
… air void system in concrete. This study uses ASTM C457, “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete” as a baseline characterization method and attempts to thoroughly reduce the long sample preparation and characterization time …
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Effects of Atomic Oxygen on Outgassing of Silicone Materials
… the outgassing properties of materials using ASTM E595 and another vacuum chamber intended to determine how materials are affected by atomic oxygen using ASTM E2089 to determine how atomic oxygen affects outgassing of silicones, which are of interest as atomic oxygen can alter the chemical …
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Experimentation of Mode I and Mode II Fracture of Uni-Directional Composites and Finite Element Analysis of Mode I Fracture Using Cohesive Contact
… different loading conditions. For this research, ASTM D5528, ASTM D7905 & 4ENF tests were performed to evaluate the fracture resistance of uni-directional pre-preg laminates; the 4ENF was used to compare its effectiveness as to ASTM D7905.</p> <p>Finite element methods such as the use of cohesive …
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