ASTM D1623 Type A Test Fixture

Description

ASTM D1623 Standard Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics

 

ASTM D1623 covers the determination of the tensile and tensile adhesion properties of rigid cellular materials in the form of test specimens of standard

shape under defined conditions of temperature, humidity, and testing machine speed

Tensile properties shall be measured using any of three types of specimens:

Type A shall be the preferred specimen in those cases where enough sample material exists to form the necessary specimen.

Type B shall be the preferred specimen when only smaller specimens are available, as in sandwich panels, etc.

Type C shall be the preferred specimen for the deter- mination of tensile adhesive properties of a cellular plastic to a substrate as in a sandwich panel

(top and bottom substrate) or the bonding strength of a cellular plastic to a single substrate.

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ASTM D1623  / Apparatus

Testing Machine

A testing machine of the constantrate- of-crosshead-movement type comprising essentially the following:

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ASTM D1623 / Grips

Grips for holding the test specimen shall be the self-aligning type; that is, they must be attached to the fixed and movable members of the testing machine

in such a way that they will move freely into alignment as soon as any load is applied, so that the long axis of the test specimen will coincide with the direction of

the applied pull through the center line of the grip assembly.

*** Universal-type joints immediately above and below the specimen grips are recommended.

The test specimen shall be held in such a way that slippage relative to the grips is prevented, in so far as possible.

For Type A specimens,

For Type B specimens

For Type C specimen

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Load Indicator

Use a load cell or suitable loadindicating mechanism capable of showing the total tensile load exerted on the test specimen when held in the grips

Choose an indicator that will permit precision to within 61 %.

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Extension Indicator

If measurement of the extension is desired, use a suitable instrument for determining the distance between two fixed points on the test specimen, or similarly

by grip separation or extensometer at any time during the test.

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Specimen Cutter

For Type A specimens use a suitable lathe cutter

*** Before conducting ASTM D1623 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.

 

***PARSROS  offers several types of grips and fixtures which will enable you to perform a variety of tests

  that are accurate and repeatable.