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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Link to Active This link will always route to the r3332 Active version of the standard. ASTM D outlines three test methods A-C for determining the fragility of products to be packaged for shipment in the distribution environment. Even though the product may be a prototype, additional sub-elements are frequently available to replace the one that was damaged. Method B is used when drop heights are known with great certainty. The product should be supported by a? NOTE 4—See shock machine manufacturer recommendations for setting acceleration levels because this procedure is speci?
Common practice is to de? For example, if a half sine shock pulse waveform is used, a deeply scalloped critical acceleration line is produced and the test data become meaningless.
A 2 ms duration pulse can be used on a component with a natural frequency up to 83 Hz. For specific precautionary statements, see Section 6. Accept3 able increment size is in? A product usually has a different critical velocity change for each sstm in which it is tested. Shock pulse waveform is not limited since the critical velocity portion of the damage boundary is unaffected by shock pulse shape. The procedure of A4.
The test data will have to be corrected if signi? None will be more severe than those produced by the trapezoidal shock pulse. The betweenlaboratory or d33332 standard deviation was 5.
ASTM D Foam Test Methods
This is because of the differences in pulse shape and characteristics between the fragility test and actual package cushion performance.
The instrumentation system shall have sufficient response to permit measurements in the following ranges.
Operating personnel must therefore remain alert to potential hazards and take necessary safety precautions. Depending on the purpose axtm the test, use of the last successful test point before failure may be considered as a more conservative estimate of Vc. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.
D Terminology of Packaging and Distribution Environments. The shock input for each test is thus determined by the previous test result.
For example, an increment of 5 g may be appropriate for most products but unacceptable for high-value products. If the product is complex, usually some sub-element of the product will fail? For example, an increment of 5 in.
ASTM D | Rycobel
Quality Foam can fabricate our foams to your exact specifications, whether working from our own in-house design or customer-supplied drawings. The values given in parentheses are for information only.
It is important to keep damping values the same throughout all portions of the procedures described below. It may also be used to improve product ruggedness. In this way, the rounded region of the damage boundary is avoided.
Method C is used for relatively rugged low fragility products that may not need cushioning. Two test methods are outlined, as follows: For most products, the damage boundary will be different for each direction in which the shock occurs.
In other frequency regions the cushion SRS may exceed Sc. Since they are relatively easy to control, shock pulses having a half sine shock waveform are normally used. If it passes, the specimen is tested at a shock level that is incrementally higher. Although a true square wave shock pulse is most desirable in theory, it is not possible to obtain in?
The damage boundary of a trapezoidal-shock pulse d3332 damage boundaries produced by other waveforms. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?