... In 1951, NSF, then the National Sanitation Foundation, was approached by the Thermoplastics division of the Society of the Plastics Industry to initiate a research study related to the suitability of plastic pipe for potable water supplies. The results were reported in 1955 under the title...

... a subject of considerable research over the past several years. This paper presents a method for determination of long-term service life of corrugated HDPE pipe by utilizing some of the current widely accepted methods employed by the smooth-walled plastic pipe industry while modifying them somewhat to take...

... to the combustion gas stream gives the heat release rate history of the sample as a function of its temperature. The maximum rate of heat release and the temperature at which it occurs are polymer characteristics related to .re performance and flame resistance. polymer plastic fire flammability flame...

... efficient composite cylinders are the cylinders that have plastic liners. The main applications are where the weight savings are important, such as cylinders for self-contained breathing apparatus (SCBA) used by firemen. In this paper, we describe an accident which occurred in France. A fireman was killed...

... Recently, Donoso and Landes proposed the existence of a common format equation (CFE) for developing calibration functions for two-dimensional fracture specimens. In the CFE approach, the relation between load, plastic displacement, and uncracked ligament size is expressed as the product of three...

...) varnish, D 202 (1924) paper and D 229 (1925) rigid sheet and plate plastics. D 495 (1938) dry tracking is generally now recognized as a technical failure, but a commercial success. This standard is still widely used and referenced! Standards D 69 (1920) friction tape, D 295 (1928) varnished cotton fabric...

... significantly affect mixture stiffness. The parameter m of the creep compliance equation which is used in the Superpave models as the slope of the permanent deformation equation is not reliable and should not be used to predict rutting. Pattern search method used to determine the Vermeer plastic properties...

... durability testing plastic paint and coating Gregory R. Fedor and Patrick J. Brennan 1 COMPARISON BETWEEN NATURAL WEATHERING AND FLUORESCENT UV EXPOSURES: UVA-340 LAMP TEST RESULTS REFERENCE: Fedor, G. R. and Brennan, E J., "Comparison Between Natural Weathering and Fluorescent UV Exposures: UVA-340...

... In this work, elastic-plastic fracture mechanics (EPFM) methods are extended to study the behavior of surface cracks. The material used is a tungsten inert gas (TIG) welded 2219-aluminum alloy, welded with 2319 weld wire. Calibration and a crack-growth test were performed. A multiple specimen R...

... rubber, and plastic film laminates; natural rubber and polyvinyl chloride were poorer barriers. permeation pesticides rubber plastic gloves protective clothing Arthur D. Schw~pe1, Rosemary Goydan1, Daniel J. Ehntholt 1, Uwe Frank2, and Alan P. Nielsen-' RESISTANCE OF GLOVE MA'IERIALS...

... II as has been observed for slow crack growth in visco-elastic polymers. For the first loading from the end of the starter cracks, plastic deformation at the crack tip also contributed to the nonlinearity. Other sources of nonlinearity included an increasing fracture resistance in one...

... rubber mixing permeability plastic polychloroprene polyisobutylene polyvinyl chloride rubber processing technology resistance to weather resistance to water resistance to outdoor aging resistance to moisture vapor transmission rubber processing technology seaming sheet membrane single ply...

... The fatigue fracture surface micromorphology of poly(vinyl chloride) (PVC) was studied as a function of molecular weight (M), plasticizer content, and residual orientation, with particular attention given to how these variables affect the formation of discontinuous growth bands (DGBs...

... percent by volume, was estimated to reduce the effective thermal performance of the material to 60 percent of that which would have been realized had there been no shrinkage. urea formaldehyde foam insulation plastic thermal insulation material standards formaldehyde fungal growth shrinkage...

... Carbon and Alloy Steel Forgings for Pressure Vessels (A 508-77) and HY-130 high-strength structural steel is shown along with graphic plots of the J Ic results. It is expected that a fully computer controlled test will result from this initial test program. computers elastic plastic testing...

... Deterioration of most plastic materials starts at the outer surface and may take the form of discoloration, pitting, exudation of ingredients, fiber prominence, and microcracking. The deleterious effects of weathering consist of a complex set of processes in which the combined action...

... of these estimation techniques. Comparisons between the values of J as calculated by the energy rate definition and those calculated by the estimation techniques for compact toughness, three-point bend, and center-cracked tension specimens are made. elastic methods estimates plastic techniques...

... Information from tests on blunt notched specimens for J-integral calibration by conventional J = -1/ B ∂ U /∂ a analysis is used to evaluate the significance of plastic zone adjustment to physical crack length in crack growth resistance, K R , calculations. Secants are drawn to load versus...

... estimated from fracture mechanics analysis, with its size being on the order of one tenth of the notch radius. Plasticity effects must be handled properly in predicting crack initiation, but linear elastic analysis is generally satisfactory for handling the propagation phase. fatigue (materials...