ASTM D2990 PDF

0 Comments

ASTM D – Air Permeability of Textile Fabrics . ASTM D testing determines the tensile and compressive creep and creep-rupture of plastics under. ASTM D CREEP TESTING. These test methods cover the determination of tensile and compressive creep and creep-rupture of plastics under specified. Creep tests are described in the following standards: ISO , ISO , and ASTM D A full notch creep test (FNCT) to ISO is used to test pipes.

Author: Gazil Akinolabar
Country: Malaysia
Language: English (Spanish)
Genre: Automotive
Published (Last): 26 June 2004
Pages: 151
PDF File Size: 13.91 Mb
ePub File Size: 16.8 Mb
ISBN: 384-7-50012-476-8
Downloads: 99322
Price: Free* [*Free Regsitration Required]
Uploader: Vudogor

ASTM D2990

Deflection is measured using either the die movement after correction to the self-deformation of the test arrangement or using a video measuring system. The test load, which is specified prior to the start of the test is based on the polymer characteristics and the intended use, is applied without jolts.

Temperature and humidity d2909 typically recorded throughout out the test. Electromechanical Creep Testing Machines The Kappa creep testing machine is equipped with a central lead screw and is suitable for creep tests and advanced creep tests requiring maximum precision in force control.

The test load is calculated according to the requirements and must be applied without jolts and then held constant. Our website uses cookies to ensure that we give you the best user experience.

Creep Tests

The test results are as follows: Conditioning is an important part of the test. For this reason it is necessary to ensure that the r2990 temperature remains constant throughout the test. As is the case with all flexure tests, the specimen height must be measured carefully.

  CAUGHT MARGARET PETERSON HADDIX PDF

The test axes are equipped with tensile specimen grips. X Our website uses cookies to ensure that we give you the best user experience. Specimen strain is recorded by a state-of-the-art measuring system. The testing machines are equipped with multiple test axes. The specimen strain is determined optically by modern creep test systems that use a high-precision video measurement system.

Using this data, creep curves can be generated, which depict the long-term behavior of plastics.

Creep tests on plastics

The materials covered range from simple polyolefins to high-performance thermoplastics. Along with creep testing,they can be used for quasistatic test methods, for example, to perform a tensile test to ISO It is necessary to prevent thermal expansion aatm to temperature fluctuations, which overlap the creep strain.

The specimen strain is recorded over the course of the test, which often lasts 1, hours. For tests above or below ambient temperature, precisely controlled temperature chambers are used. Flexure creep modulus Creep flexural strength Creep curves with logarithmic time axis Creep module time aatm with logarithmic time axis Isochrone stress-strain curves.

Since this type of test runs over a long period of time, it is typical to test multiple specimens at once. By continuing to browse our website, you are agreeing to the use of cookies. They provide slip-free gripping of the specimen, typically specimen type 1A to ISO Creep tests are described in the following standards: During a creep test, specimens are subjected to a static load. The standard ISO specimen has dimensions of 10 x 4 x 80 mm and is taken from the mid-section of the multi-purpose specimen.

  GRZDOWICZ PAN LODOWEGO OGRODU TOM 3 PDF

It is mounted behind the test axes to allow access to the system by the operator from the front. This corresponds to the load placed on many components made of plastic.

In this way it is possible to achieve statistically verified test results. Experience the ease of intuitive and structured operation that reflects your lab processes.

A three-point flexure fixture, as described in ISO for flexure testsis used as the flexure test tool.

ASTM D – CREEP TESTING

Tensile creep modulus and the nominal tensile creep modulus Creep tensile strength Creep curves with logarithmic time axis Creep module time curves with logarithmic time axis Isochrone stress-strain curves Recovery strain curve. The company has recently expanded its creep tensile testing capacity by investing in two Kappa Multistation creep testing systems by ZwickRoell.

The electromechanical creep testing machine, KappaMultistationis equipped with a load cell and one drive per test axis.