Showing results: 16 - 30 of 158 items found.
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National Technical Systems
Thermo Gravimetric Analysis (TGA) is a thermal analysis technique used to measure changes in the weight (mass) of a sample as a function of temperature and/or time. TGA is commonly used to determine polymer degradation temperatures, residual solvent levels, absorbed moisture content, and the amount of inorganic (noncombustible) filler in polymer or composite material compositions.
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National Technical Systems
TMA is used to characterize linear expansion, glass transitions, and softening points of materials by applying a constant force to a specimen while varying temperature. For expansion measurements, a probe rests on a sample on a stage with minimal downward pressure. Other constant force experiments include measurement of penetration, bending, tension, shrinkage, swelling, and creep (sample motion measured as a function of time under an applied load).
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National Technical Systems
Volume resistivity represents an insulating material’s resistance to leakage current through its body. It calculates the ratio of the potential gradient in relation to the current in a material with the same density. A direct-current resistance between opposing faces of a one-meter cube of the material numerically equates to volume resistivity in SI (Ohm-m).
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ASTM D635 -
National Technical Systems
This test method was developed for polymeric materials used for parts in devices and appliances. The results are intended to serve as a preliminary indication of their acceptability with respect to flammability for a particular application. The final acceptance of the material is dependent upon its use in complete equipment that conforms with the standard applicable to such equipment.
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ASTM D882 -
National Technical Systems
This test method covers the determination of tensile properties of plastics in the form of thin sheeting and films (less than 1.0 mm (0.04 in.) in thickness). Film is defined in Terminology D883 as an optional term for sheeting having a nominal thickness no greater than 0.25 mm (0.010 in.). Tensile properties of plastics 1.0 mm (0.04 in.) or greater in thickness shall be determined according to Test Method D638. This test method can be used to test all plastics within the thickness range described and the capacity of the machine employed. Specimen extension can be measured by grip separation, extension indicators, or displacement of gage marks. The procedure for determining the tensile modulus of elasticity is included at one strain rate. The modulus determination is generally based on the use of grip separation as a measure of extension; however, the desirability of using extensometers, is recognized and provision for the use of such instrumentation is incorporated in the procedure. Test data obtained by this test method is relevant and appropriate for use in engineering design. The values stated in SI units are to be regarded as the standard. The values in parentheses are provided for information only. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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EUROCAE ED-105 -
National Technical Systems
The EUROCAE ED-105 is the Aircraft Lightning Test Methods published by the European Organization for Civil Aviation (EUROCAE). The document is one of a set covering the whole spectrum of aircraft interaction with lightning. Its intent is to describe how to conduct lightning direct effects tests and indirect effects tests
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National Technical Systems
Ballistics testing is a critical component of the QA processes associated with MIL-STD-810 and other regulatory guidelines. At NTS, we have more than 50 years of experience helping defense contractors meet these challenges while developing more effective tools and technologies for America’s troops. With a number of ballistics testing facilities throughout the country, we specialize in meeting your project’s requirements in a safe and cost-effective manner. Our team of in-house engineers is comprised of recognized experts in their field, and our testing labs are equipped with some of the most sophisticated measurement and analysis tools available today.
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National Technical Systems
Products and equipment used at excessive heights need to be durable enough to withstand the extreme conditions they will face. Accurately replicating temperature, humidity and atmospheric conditions requires specially designed facilities in which controlled, precise altitude testing can be performed.
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National Technical Systems
Different types of devices have different thresholds for acceptable amounts of acoustic noise. Acoustic testing services assess how your product will perform in real-world conditions, and whether or not further revisions should be made to reduce noise. At NTS, we have more than 50 years of experience performing acoustic noise testing and monitoring. We can determine an appropriate testing protocol for your needs, and ensure it is completed to the highest possible standards at one of our many test centers located across the country.
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National Technical Systems
Acceleration testing provides engineers with data on the behavior of materials and equipment when the test items are subjected to acceleration forces (typically measured in terms of g-forces) applied slowly and held steadily for extended periods of time. Acceleration testing specifically avoids creating shock, vibration, or dynamic (resonant) responses in test items.
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National Technical Systems
NTS’ Pittsfield, Massachusetts facility has long been involved in the wind power industry. Our participation in the IEC TC-88 PT 24 committee which is responsible for releasing the wind industry test standard IEC 61400-24 and the development of our analytical modeling capabilities enable our engineering department to provide the design evaluation and testing services your wind power products require.
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National Technical Systems
Many people may consider flocking birds such as sea gulls, ravens, and pigeons to be a nuisance but otherwise harmless. However, to jet aircraft and individuals carried aboard, the possibility of a bird strike poses an existential threat. For instance, when U.S. Airways Flight 1549 crashed into the Hudson River in New York back in January, 2009, the subsequent investigations performed by the NTSB and FAA found that a double bird strike during take-off (one in each engine) caused the incident.
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National Technical Systems
Advanced Composite Materials (ACMs) have broad, proven applications, in the aircraft, aerospace, and sports equipment sectors. Even more specifically ACMs are very attractive for aircraft and aerospace structural parts. ACMs have been developing for NASA’s Advanced Space Transportation Program, armor protection for Army aviation and the Federal Aviation Administration of the U.S.A., and high-temperature shafting for the Comanche helicopter. Additionally, ACMs have decades of history in military and government aerospace industries. However, much of the new technology is now being developed for secondary or commercial markets, and the technology of advanced composites manufacture is continually evolving.
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National Technical Systems
NTS can perform detailed compatibility and functionality testing of your product with various hardware (e.g., platforms, adapters, other Bluetooth peripherals, etc.) and software (e.g., operating systems and other applications). We can also perform interference testing to see how other technologies (e.g., ZigBee, microwaves, cordless phones, etc.) may interfere with your product. We can also perform range testing in our facility to evaluate how well it performs in the real-world.
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National Technical Systems
The intent of arc resistance testing is to distinguish between solid electrical insulating materials. It examines the specimen’s ability to resist an arc with high voltage and low current exposed to the material’s insulating surface. The ASTM arc resistance test for dry and uncontaminated materials centers on the time elapsed until tracking paths form.