AECTP 400 test methods are to replicate the effects of vibration environments to which systems, subsystems and units (hereinafter referred to as materials) are exposed during specified operating conditions. This test method is applicable where it is necessary for the material to demonstrate its ability to resist the specified vibration environment without unacceptable deterioration in its functional and/or structural performance.
AECTP 400 is one of five documents included in STANAG 4370. It is important to use AECTP-400 in conjunction with other AECTPs (100 to 500) to implement the Environmental Project Tailoring process. This process ensures that the material is designed, developed and tested according to requirements directly derived from expected service use conditions.
It is particularly important to use AECTP 400 in conjunction with AECTP 100, which addresses the strategy, planning and implementation of environmental missions, and AECTP 200, which provides information on the characteristics of environments and guidelines for the selection of test methods.
The test methods contained herein, together with the associated considerations, are believed to form the basis for reasonable verification of the material's resistance to the effects of certain mechanical environments. It should be noted, however, that the test methods aim to reproduce the effects of the respective environments and do not necessarily replicate the actual environmental conditions. Where possible, guidance is provided on the limitations of the intended applications. If available, it is recommended to use measured data to establish test severity.
The AECTP-400 Test Methods address mechanical environments, both individually and when combined with other environments such as climate environments included in AECTP 300. The application of combined media is appropriate and often necessary where failures due to possible synergistic effects can be expected.
When developing a test program, the expected life cycle of the material and changes in the material's resistance caused by prolonged exposure to various mechanical environments will be considered. The environmental conditions of suitable material platforms should also be provided. Guidance on these aspects and information on the characteristics of the environments are given in AECTP 200. Guidelines for planning and implementing environmental missions are given in AECTP 100.
AECTP-400 has not been specifically developed to cover the following applications, but they can be applied in certain situations:
Weapon effects other than EMP,
Ammunition safety tests covering abnormal environments,
Packaging tests,
Suitability of clothing or fabric articles for military use,
Environmental stress screening (ESS) methods and procedures.
The list of AECTP 400 Test Methods reflects those already developed and completed. It is not comprehensive as other methods will be revised as they are developed. The listed methods should not be applied indiscriminately and should be selected for application when necessary. The AECTP 400 test sections are as follows:
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