ASTM D3332 PDF
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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For a product of this type, it is important to determine the probable number of shocks that it will be subjected to in shipment. The testing of hazardous material or products may require special precautions that must be observed. The test surface shall be guided to fall vertically without rotation or translation in other directions.
A number in parentheses indicates astn year of last reapproval. The maximum acceleration at which product damage first occurs is the fragility of the product in the direction tested. The accelerometer is fastened to the carriage in this case, and a rigid mass weighing the same as the product is subjected to a series of shock pulses.
Link to Active This link will always route to the current Active version of the standard. It may also be used to improve product ruggedness.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. 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.
If it passes, the specimen is tested at a shock level that is incrementally higher. D33332, it can be measured by photodiode-type devices that measure shock table impact and rebound velocity.
Safety equipment may be required, and its use must be understood before starting the test. Accept3 able increment size is in? Quality Foam can fabricate our foams to your exact specifications, whether working from our own in-house design or customer-supplied drawings.
The SRS of the shock pulse transmitted by the cushioning need only lie below Sc in a frequency range of approximately 1? For example, an increment of 5 in. Last previous edition D — It will fail only when it is subjected to even higher level shocks.
Originally published as D — On the basis of much testing experience, it has been determined that rise and fall times see Fig. As more product samples become available, the test results should be re? The accelerometer shall be attached rigidly to the base structure of the product or to the?
For specific precautionary statements, see Section 6. Government Printing Office,pp. It is important to keep damping values the same throughout all portions of the procedures described below.
ASTM D3332 Foam Test Methods
A research report5 describes an interlaboratory test program of three types of items in packages for a critical velocity change shock test.
Therefore, the test in accordance with Test Method B 9. Shock Response Spectrum SRS analysis can provide a tool for safely reducing the amount of conservatism.
Examples of unpackaged product handling are movement of the? For the same reason, waveforms having faired shapes that are not trapezoidal should not be used for this test.
ASTM D Foam Test Methods
A 2 ms duration pulse can be used on a component with a natural frequency up to 83 Hz. Referenced Documents purchase separately Awtm documents listed below are referenced within the subject standard but are not provided as part of the standard.
The repeatability standard deviations were 6. The values given in parentheses are for information only.
Most products are not affected by this multiplicity of tests. Calculation that assumes the shock pulse to be a perfect geometric?
ASTM D | Rycobel
The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Zero damping, however, satm not possible for real products and systems, although in most actual situations damping is low. Two test methods are outlined, as follows:. 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.