This standard is issued under the fixed designation D ; the 1 These test methods are under the jurisdiction of ASTM Committee D on. ASTM D Standard Test Methods for Mechanical-Shock Fragility of Products , Using Shock Machines. Shock Machine Testing. Shock testing was performed on a shock machine that is in compliance with the following standard: ASTM D −

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Longer rise and fall times cause the critical acceleration line of the damage boundary curve to deviate from the horizontal, introducing errors into the test results.

It may also be used to dd3332 product ruggedness. Therefore, the test in accordance with Test Method B asrm. Failure occurred in the fourteenth test, establishing the horizontal critical acceleration line Ac midway between the thirteenth and fourteenth test levels see 9. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. On the basis of much testing experience, it has been determined that rise and fall times see Fig.

Current edition approved April 10, Unit or consumer packages, which are transported within an outer container, are considered to be the product for the purposes of these test methods.

A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? A product usually has a different critical velocity change for each direction in which it is tested. For specific precautionary statements, see Section 6.

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A research report5 describes an interlaboratory test program of three types of items in packages for a critical velocity change shock test.

This procedure is repeated for each orientation and each part of the damaged boundary V c and Ac that is x3332 interest. D Terminology of Packaging and Distribution Environments.

Only the critical velocity change test may suffice in this case. In this way, the rounded region of the damage boundary is avoided. The betweenlaboratory or reproducibility standard deviation was 5.

Wstm test data will have to be corrected if signi? Then, when the carriage is dropped, the product is examined for product damage. A 2 ms duration pulse can be used on a component with a natural frequency up to aastm Hz.

It will fail only when it is subjected to r3332 higher level shocks. It may also be used to improve product ruggedness. The peak acceleration of this shock pulse will often exceed Ac. When a second sample of such a product is subjected to a single shock pulse at the same level that caused the?

The machine is set to attain a velocity change which exceeds the minimum required to damage the product, but at a very low acceleration level. This fragility information may be used in designing shipping containers for transporting the products. For a product of this type, it is important to determine d33322 probable number of shocks that it will be subjected to in shipment. 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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If the component natural frequency is higher, the pulse duration must be shorter. Zero damping, zstm, is not possible for real products and systems, although in c3332 actual situations damping is low. Method C is used for relatively rugged low fragility products that may not need cushioning.

ASTM D Foam Test Methods

Pulse durations as short as 0. Shock pulse waveform is not limited since the critical velocity portion of the damage boundary is unaffected by shock pulse shape.

After the tests of the?

Site design by Softnet. That is, it may be possible to design the cushion to transmit a somewhat higher acceleration yet still not cause damage to the product.

ASTM D3332

NOTE 1—The points at which the? The test area should be cleared prior to each impact.

ast, Shock pulses having values outside the shaded area will not damage the product. Drop height control shall be provided to permit reproducibility within Depending on the purpose of the test, use of the last successful test point before failure may be considered as a more conservative estimate of Ac. The pulse shape depends on the dynamic force-versus-de?