ASTM D3332 Mechanical Shock Fragility Package Testing
ASTM D3332 shock testing evaluates the shock fragility of packaged products. As an ISTA-accredited test facility, Keystone Package Testing realizes the importance of mechanical shock package compliance testing. Meeting the ASTM D3332 requirements can be difficult. We understand the challenges and guide companies through the process.
When packages do not meet the requirements, Keystone assists with finding solutions. We provide comprehensive reports shortly after the completion of the testing. Keystone takes a consultative approach throughout the entire test program. Lastly, our proven process helps avoid product launch delays.
Summary of the ASTM D3332 Mechanical Shock Test
The ASTM test standard for mechanical shock determines the shock fragility of products. This fragility information is used when designing shipping containers for transporting the products. ASTM D3332 can also be used to improve product ruggedness.
Products that are transported within an outer container are considered to be the product for this standard. These products are generally consumer packages.
Lastly, this standard test method provides manufacturers with data on product shock fragility. This data is used in choosing optimum cushioning for shipping containers or product design.
ASTM D3332 Mechanical Shock Compliance Testing Procedures
The standard outlines two procedures. Test Method A and Test Method B. Method A will determine the product’s critical velocity change. On the other hand, method B determines the product’s critical acceleration.
Sampling and Conditioning
Before testing, a sample size is determined. Sampling procedures and the number of test specimens depend on the specific purposes and needs of the testing.
If temperature and humidity conditioning is required, ASTM D4332 is carried out. Unless otherwise specified, all tests are conducted with the same conditions.
First, the product is mounted on the shock test machine. The product may be supported by a fixture similar in shape and configuration to the cushion supporting the product in its shipping container. The fixture is fastened to the product so that the product does not leave the surface of the carriage during the shock test.
Test Method A: As mentioned above, test method A determines the critical velocity change portion of the damage boundary plot of a product.
One shock is performed. Next, the unit is examined or functionally checked to determine whether damage due to shock has occurred.
This method is carried out with incrementally increasing velocity change until product damage occurs.
Test Method B: This test method is used to determine the critical acceleration portion of the damage boundary plot of the product.
Trapezoidal shock pulses are most commonly used for this test method. One shock is performed. Next, the recorded shock pulse is examined to be certain the desired maximum-faired acceleration and velocity change are obtained.
If no damage has occurred, the shock test machine is set for a higher maxim-faired acceleration level. This shock fragility test is repeated until damage occurs.
After the completion of the test, a report is expedited with the following information:
- Reference to this test, including any deviations from the standard
- Identification of the product being tested
- Method of mounting the product on the carriage of the shock test machine
- Type of instrumentation used
- Recordings of the shock pulses
- Record of the shock test machine drop height for each shock pulse that caused damage
- Record of damage, including a photograph of product damage, if visible
Expert ASTM D3332 Mechanical Shock Package Testing Laboratory
In addition to ASTM D3332 testing, Keystone has a full scope of expertise including drop, accelerated aging, and temperature validation. Our team strives to give our customers more time and energy on product development instead of testing.
Contact us to learn first hand why so many companies partner with Keystone to achieve their ASTM D3332 package integrity test needs.