ASTM D7030-04 Short-Term Creep Performance of Corrugated Fibreboard Containers Under Constant Load

Scope:

Empty paper corrugated shipping containers are put to the test. A compression load is applied vertically for a given time period, and the resistance of the test container to the applied load is determined by the procedure defined by ASTM D7030-04. Pelletized/unitized loads can also be tested. Testing is done keeping in mind that such boxes are often stacked up one over the other. A fixed platen compression testing equipment exerts a fixed static load under specified atmospheric conditions. The failure of corrugated containers can be thus obtained using this standard testing method.

Test Procedure:

The constant load to be exerted on the container under test is selected. The specimen is placed at the center of the bottom plate of the testing apparatus, and the test load is placed on it. The climatic conditions specified for the test are to be maintained throughout the entire duration of the compression creep test. The deflection versus time data is recorded for a given time period. The recommended test time is 12 hours.

Specimen Size:

ASTM D7030-04 test is conducted on empty containers. The specimen size may vary depending on the apparatus used.

Data:

R= R12×P/(100-P)

where,
R12 = average creep rate in 12-h test (slope of straight line
fitted to creep data), and
P = load level expressed as a percent of Test Method D642 compression strength.
T= D/R
where:
T = time to fail,
D = failure deflection, and
R = adjusted creep rate.