ASTM D1621 PDF

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D Standard Test Method for Compressive Properties of Rigid Cellular Plastics rigid Standard + Redline PDF Bundle ASTM License Agreement. This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D on Plastics. This test method provides information regarding the mechanical behavior of rigid cellular materials under compressive loads. This test makes it possible to.


Astm D1621 Pdf

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Similar to ISO , ASTM D is a testing standard designed to measure the compressive properties of rigid cellular plastics (i.e. foam). ASTM D - Designation: D – 10 Standard Test Method for Compressive Properties of Ri. Model No. ASTM.D - Rigid Cellular Plastics Compression Test Fixture. The compression test fixture consists of an upper and lower platen set. The 8” in.

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Originally published as D 59 T. Last previous edition D The tests cannot be considered signicant for engineering design in applications differing widely from the load - time scale of the standard test.

Such applications require additional tests such as impact, creep, and fatigue. If there are no material specications, then the default conditions apply. Apparatus 5. A spherical loading block of the suspended, self-aligning type is recommended for the upper loading platen. Verify the calibration of the test machine and lead indicator in accordance with Practices E 4. NOTE 2Although the use of dial gages or automatic recorders to measure crosshead movement and thus obtain deformation complies with this test method, it should be pointed out that this is not exactly comparable to the use of strain-measuring devices mounted on the specimen.

The use of crosshead movement to obtain strain leads to values of moduli of elasticity having considerable variation, and to values perhaps only one tenth of those obtained by measuring strain directly on the specimen. Test Specimen 6.

Astm d1621 free download zip

The minimum height shall be Care should be taken so that the loaded ends of the specimen are parallel to each other and perpendicular to the sides. NOTE 3Cellular plastics are not ideal materials, and the compressive modulus may appear signicantly different, depending on the test conditions, particularly the test thickness. All data that are to be compared should be obtained using common test conditions.

If it is necessary to place gage marks on the specimen, this shall be done so as not to affect the surfaces of the specimen. Specimens that fail at some obvious aw should be discarded and retests made, unless such aws constitute a variable the effect of which it is desired to study.

Conditioning 7. In cases of disagreement, the tolerances shall be 61C Procedure 8. Hold the pressure of the dial foot to 0. When a sliding-caliper gage is used, the proper setting shall be that point at which the measuring faces of the gage contact the surfaces of the specimen without compressing them. The rate of crosshead movement shall be 2.

Also read: ASTM F710 EBOOK

If there are no material speci? Apparatus 5. The testing machine shall also include the following: 5.

The accuracy of the load measurement system shall be veri? These plates shall be larger than the specimen loading surface to ensure that the specimen loading is uniform. This measurement is made through use of the test machine crosshead drive system or using a direct measurement of compression platen displacement.

The accuracy of the displacement measurement transducer shall be veri? This variance is a function of load frame stiffness, drive system wind-up, load cell compliance and?

This compliance can be measured then, if determined to be signi? The procedure to determine compliance follows: 1 Con? Stop the crosshead and return to the pre-test location.

On each specimen test curve at each given load value, subtract the system compliance from each recorded displacement value. This will be the new load-de?

ASTM D1621

Test Specimen 6. The minimum height shall be Care should be taken so that the loaded ends of the specimen are parallel to each other and perpendicular to the sides.

NOTE 2—Cellular plastics are not ideal materials, and the compressive modulus may appear signi? All data that are to be compared should be obtained using common test conditions.

Conditioning 7. Procedure 8. Hold the pressure of the dial foot to 0. When a slidingcaliper gage is employed, the proper setting shall be that point at which the measuring faces of the gage contact the surfaces of the specimen without compressing them. It will expedite the testing process if, when the specimen is in place, the upper platen is positioned close to, but not touching, the specimen. This recorded curve will be used directly if following 5.

Substitute the speci?

Calculation 9. Specimens that fail at some obvious? Measure all distances for deformation or strain calculations from this point.

Other books: ASTM E617 DOWNLOAD

At that point Point M in Fig. Read the load and measure the deformation or strain Distance O-T at that point.

It is obtained by pooling the within-laboratory standard deviations of the test results from all of the participating laboratories. Precision For each material, all of the samples were prepared at one source, but the individual specimens were prepared at the laboratories that tested them. Each test result was the average of seven individual determinations.Request RR:D Users of this test method should apply the principles outlined in Practice E to generate data speci?

Conditioning 7. Each test result was the average of seven individual determinations. Do we really need another conditioning standard? Each test result was the average of seven individual determinations. NSF International conducts a comprehensive three- part program to ensure the quality and safety of the polyethylene gas distribution pipe and fittings manufactured by Performance Pipe. It will expedite the testing process if, when the specimen is in place, the upper platen is positioned close to, but not touching, the specimen.

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