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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Although a true square wave shock pulse is most desirable in theory, it is not possible to obtain in?
asstm 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. Precision and Bias This procedure is less accurate than that described in A4.
Therefore, the test in accordance with Test Method B 9. Accept3 able increment size is in? Shock pulses having values outside the shaded area will not damage the product.
Failure occurred in the seventh test, establishing the vertical critical velocity change line midway between the sixth and seventh test levels see 9. 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. Each trapezoidal shock pulse had a faired acceleration level incrementally higher than the previous shock pulse.
Depending on the purpose of the test, use of the last successful test point before failure may be considered as a qstm conservative estimate of Vc. Maximum-faired acceleration level of the? For example, a component of a product with a natural frequency below 56 Hz can be effectively tested on a shock machine with a 3 ms duration pulse.
It may also be used to improve product ruggedness. For this reason, shocks transmitted by some cushion materials will be less severe than those produced by the trapezoidal-shock pulse test. Sample size determination based on Practice E or other established statistical procedures is recommended.
D Terminology c3332 Packaging and Distribution Environments.
It may also be used to improve product ruggedness. Historical Version s – view previous versions of standard. Operating personnel must therefore remain alert to potential hazards and take necessary safety precautions. NOTE 1—The points at which the? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
ASTM D3332 Foam Test Methods
Such a factor will vary widely for different types of products. Safety equipment v3332 be required, and its use must be understood before starting the test.
For example, an increment of 5 in. The shock input for each test is thus determined by the previous test result. If the product is complex, usually some sub-element of the product will fail? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. In this way, the rounded region of the damage boundary is avoided. Most products are not affected by this multiplicity of tests. Even though the product may be a prototype, additional sub-elements are frequently available to replace the one that was damaged.
The betweenlaboratory or reproducibility standard deviation was 5. If the component natural frequency is higher, the pulse duration must be shorter.
ASTM D Foam Test Methods
Examples of unpackaged product handling are movement of the? Unit or consumer packages, which are transported within an outer container, are considered to be the product for the purposes of these test methods.
Method C is used for relatively rugged low asstm products that may not need cushioning. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Complete details and descriptions of SRS may be found asttm the literature Method B is used when drop heights are known with great certainty. Two test methods are outlined, as follows: The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
The machine is set to attain a velocity change which exceeds sstm minimum required to damage the product, but at a very low acceleration level.
The procedure of A4. Since they are relatively easy to control, shock pulses having a half sine shock waveform are normally used. Be certain that the velocity change of subsequent shock pulses is maintained at or above the level determined in 9. Current edition approved April 10, Damage c3332 render the product unacceptable because it becomes inoperable or fails to meet performance speci?
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. If it passes, the asm is tested at a shock level that is incrementally higher.
Their use would cause the critical acceleration line of adtm damage boundary curve to vary widely as a function of velocity change.