Impact penetration test

Water resistance test methods include AATCC 127 (hydrostatic pressure test), AATCC 42 (impact penetration test), and AATCC 35 (rain test). In the hydrostatic pressure test, a sample is subjected to a column of increasing water pressure until leakage occurs. The impact penetration test requires water to be sprayed on the taut surface of a fabric sample from a height of two feet. The fabric is backed by a blotter of predeterrnined weight, which is reweighed after water penetration. The rain test is similar in principle to the impact penetration test. 

Water-resistant fabrics protect against water penetration during a light or brief shower and pass AATCC Test Methods 22 and 42 (Impact Penetration Test). 

AATCC TM 42-Water resistance impact penetration test... 

AATCC 42-1985, Water Resistance Impact Penetration Test Five hundred ml of liquid is allowed to spray from a height of 2 ft against the taut surface of a test specimen backed by a preweighed blotter. The blotter is then reweighed, and the difference in weight used to determine the amount of liquid that penetrated. 

Results of the KC Blood Strike Through Test, the Impact Penetration Test, the Hydrostatic Pressure Test, the Biological Fluid Resistance Test (2 psi) were highly correlated (i.e., they differentiated between different types of gowns in a similar manner). 

AATCC test method 42-2000. Water resistance impact penetration test. AATCC technical manual, vol. 82. 2007. 

The AATCC 42-1994 impact penetration test [155] uses an apparatus similar to that of the spray test, but the fabric is clamped to the inclined stand with a... 

In this paper, the performanees of laser-ultrasound are estimated in order to identify lacks of weld penetration. The laser-ultrasonic technique is applied to cylindrical metallic strucmres (few mm thick) in a single-sided control. The results obtained for different materials (gold-nickel alloy and tantalum) are presented by B-sean views for which the control configuration is discussed with regard to the thermal effects at the laser impact. This testing is performed for different lacks of weld penetration (up to 0.5 mm for a thickness of 2 mm) even in the presence of the weld bead, which corresponds to an actual industrial problem. 

Small Arms Ammunition , TM 9-1990(1947), 42-4(Bullet Stripping Test, Bullet Penetration Test, Bullet Fit Test and Bullet Pull Test are briefly described) 12)E.Burlot, MAF 23, 185 (1949)(Detonation of ordinary expls by impact of solid projectiles launched at great velocities) 13)L.Medard ( )Cessat, MAF 23, 195-203(1949)... 

Figure 5.15. Impact fracture surface of C/SiC composites [24] (a) after Charpy impact test and (b) after the nails penetrated test...

Friction tests that utilize violent rubbing against a hard or abrasive surface are the Pantex skid test, the oblique impact test, and also the friction-impact torpedo test [12]. These tests also are for secondary explosives and involve the shear strength and penetration hardness of the softer materials. 

Impact-Penetration Energy The puncture impact system uses a swinging pendulum arm. A round test sample, clamped around its periphery, is impacted. The penetration energy is calculated from the force necessary to break the sample. 

A typical helmet is expected to be between 5 and 10 mm thick, dependent on both material type and applicatioa The shell thickness is normally determined experimentally by the penetration test. The shell canbe made of either an injection-moulded thermoplastic or a pressure-moulded resin system, reinforced with ballistic resistance fabrics/fibres (Mills, 1996). Energy is absorbed when the helmet is impacted, with the shell bending and deformation of the underlying foam. The amount of the impact energy absorbed by the foam depends on ... 

Lenses are tested to withstand the impact of a 2.5-cm (1-inch) ball dropped from 127 cm (50 inches), plus a penetration test for plastic lenses as required by American National Standards Institute (ANSI) Z87 for all eye and face protectors, two-level classification for impact protection. See ANSI Z87.1-2003, Standard for Occupational and Educational Eye and Face Protection Devices. 

Testing and validation of automotive Li-ion batteries falls into two major categories. The first is performance testing intended to determine how the battery will perform under a variety of conditions and usage models. The second is abuse testing intended to determine how the battery will react to various abuse situations, such as crash, impact, penetration, rollover, and high temperatures. 

The casks withstood the majortty of Impacts well, with the exception of the piston impacts. However, in no test was the inner cavity penetrated. D CFR Title 10, Part 72 continues to require a penetration test, additional Impact shields, nuiy have to be buUt around some casks. 

High-speed penetration tests were conducted by subjecting samples to shock cylindrical punching at speeds of 125, 600 and 800 m/s [13]. At the moment of impact, the temperature distribution over the punch pattern on the backside of the samples was recorded using an infrared camera. 

This paper deals with the control of weld depth penetration for cylinders in gold-nickel alloy and tantalum. After introducing the experimental set-up and the samples description, the study and the optimization of the testing are presented for single-sided measurements either in a pulse-echo configuration or when the pump and the probe laser beams are shifted (influence of a thermal phenomenon), and for different kind of laser impact (a line or a circular spot). First, the ultrasonic system is used to detect and to size a flat bottom hole in an aluminium plate. Indeed, when the width of the hole is reduced, its shape is nearly similar to the one of a slot. Then, the optimization is accomplished for... 

One measure of impact resistance is the laminate s mean break height (MBH) (102). In the standard test, there is a 50% probabiHty that a five-pound (2.27-kg) ball will not fall through a laminate if the ball is dropped at the MBH. Typical MBHs for 12 in. (- 30 cm) square laminates prepared with 30 mil (0.76 mm) thick interlayer are 10 ft ( -- 3 m) at 0°F (—18 C) and 15 ft ( -- 4.6 m) at 70°F (2I°C). Figure 2 shows a relationship between adhesion and falling ball penetration resistance measured at 2I°C. 

Filter layers, frost penetration, and cap-liner connections are other factors to consider in designing the closure system for a hazardous waste landfill. Before using geotextiles for filter layers in closures, one should conduct pressure tests and clogging tests on the material. Freeze-thaw cycles probably have little effect on membranes, but their impact on clay is still not known. Because of this lack of knowledge, membrane and clay layers should be placed below the frost penetration layer. Finally, a cap membrane should not be welded to the primary FML. Differential settlement in the cap can put tension on the cap membrane. In such a situation, the seam could separate and increase the potential for integration of the surface water collection system into the LDS. 

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